UNIVERSITY  OF  CALIFORNIA, 

DEPARTMENT  OF  CIVIL  ENGINEERING 
BERKELEY.  CALIFORNIA 


SMITHSONIAN  MISCELLANEOUS  COLLECTIONS 

PART  OF  VOLUME  xxxv 


SMITHSONIAN 


METEOROLOGICAL  TABLES 


[BASED  ON  GUYOT'S  METEOROLOGICAL  AND  PHYSICAL  TABLES] 


THIRD  REVISED  EDITION 

(Corrected  to  December,  1906) 


No.    1032 


CITY    OF    WASHINGTON 
PUBLISHED  BY  THE   SMITHSONIAN  INSTITUTION 

1907 


•  -  .    «        -     •    -  c          v 


Engineering 
Library 


1707 


Engineering 
Library 


ADVERTISEMENT  TO  THIRD  REVISED  EDITION. 


The  original  edition  of  Smithsonian  Meteorological  Tables  was  issued 
in  1893,  and  revised  editions  were  published  in  1896  and  1897.  A  third 
revised  edition  is  here  presented,  which  has  been  prepared  at  the  request 
of  the  late  Professor  Langley  by  the  cooperation  of  Professors  Alexander 
McAdie,  Charles  F.  Marvin,  and  Cleveland  Abbe. 

All  errata  thus  far  detected  have  been  corrected  upon  the  plates,  the 
Marvin  vapor  tensions  over  ice  have  been  introduced,  Professor  F.  H. 
Bigelow's  System  of  Notation  and  Formulae  has  been  added,  the  List  of 
Meteorological  Stations  has  been  revised,  and  the  International  Meteoro- 
logical Symbols,  together  with  the  Beaufort  Notation,  are  given  at  the 

close  of  the  volume. 

R.  RATHBUN, 

Acting  Secretary. 
SMITHSONIAN  INSTITUTION, 

December,  1906. 


111 


^ 


93330 


ADVERTISEMENT  TO  SECOND  REVISED  EDITION. 


The  edition  of  the  Smithsonian  Meteorological  Tables  issued  in  1893 
laving  become  exhausted,  a  careful  examination  of  the  work  has  been 
nade,  at  my  request,  by  Mr.  Alexander  McAdie,  of  the  United  States 
Weather  Bureau,  and  a  revised  edition  was  published  in  1896,  with  cor- 
•ections  upon  the  plates  and  a  few  slight  changes.  The  International 
Meteorological  Symbols  and  an  Index  were  also  added. 

The  demand  for  the  work  has  been  so  great  that  it  becomes  necessary 
;o  print  a  new  edition  of  the  revised  work,  which  is  here  presented  with 

corrections  to  date. 

S.  P.  LANGLEY, 

Secretary. 
SMITHSONIAN  INSTITUTION, 

WASHINGTON  CITY, 
October  30,  1897. 


IV 


PREFACE  TO  EDITION  OF  1893. 


In  connection  with  the  system  of  meteorological  observations  estab- 
lished by  the  Smithsonian  Institution  about  1850,  a  collection  of 
meteorological  tables  was  compiled  by  Dr.  ARNOLD  GUYOT,  at  the 
request  of  Secretary  HENRY,  and  published  in  1852  as  a  volume  of  the 
Miscellaneous  Collections. 

Five  years  later,  in  1857,  a  second  edition  was  published  after 
careful  revision  by  the  author,  and  the  various  series  of  tables  were 
so  enlarged  as  to  extend  the  work  from  212  to  over  600  pages. 

In    1859   a   third  edition   was  published,  with   further  amendments. 

Although  designed  primarily  for  the  meteorological  observers  report- 
ing to  the  Smithsonian  Institution,  the  tables  obtained  a  much  wider 
circulation,  and  were  extensively  used  by  meteorologists  and  physicists 
in  Europe  and  in  the  United  States. 

After  twenty-five  years  of  valuable  service,  the  work  was  again 
revised  by  the  author ;  and  the  fourth  edition,  containing  over  700 
pages,  was  published  in  1884.  Before  finishing  the  last  few  tables, 
Dr.  GUYOT  died,  and  the  completion  of  the  work  was  intrusted  to  his 
assistant,  Prof.  WM.  LIBBEY,  JR.,  who  executed  the  duties  of  final  editor. 

In  a  few  years  the  demand  for  the  tables  exhausted  the  edition, 
and  thereupon  it  appeared  desirable  to  recast  entirely  the  work.  After 
very  careful  consideration,  I  decided  to  publish  the  new  tables  in 
three  parts:  METEOROLOGICAL  TABLES,  GEOGRAPHICAL  TABLES,  and 
PHYSICAL  TABLES,  each  representative  of  the  latest  knowledge  in  its 
field,  and  independent  of  the  others ;  but  the  three  forming  a  homo- 
geneous series. 

Although  thus  historically  related  to  Dr.  Guy  of  s  Tables,  the  present 
work  is  so  substantially  changed  with  .respect  to  material,  arrange- 
ment, and  presentation  that  it  is  not  a  fifth  edition  of  the  older  tables, 
but  essentially  a  new  publication. 


Vl  PREFACE. 

In  its  preparation  the  advantage  of  conformity  with  the  recently 
issued  International  Meteorological  Tables  has  been  kept  steadily  in  view, 
aud  so  far  as  consistent  with  other  decisions,  the  constants  and  methods 
there  enployed  have  been  followed.  The  most  important  difference  in 
constants  is  the  relation  of  the  yard  to  the  metre.  The  value  provi- 
sionally adopted  by  the  Bureau  of  Weights  and  Measures  of  the  United 
States  Coast  and  Geodetic  Survey, 

i    metre  ==  39.3700   inches, 

has  been '  used  here  in  the  conversion-tables  of  metric  and  English 
linear  measures,  and  in  the  transformation  of  all  formulae  involving 
su^h  conversions. 

A  large  number  of  tables  have  been  newly  computed  ;  those  taken 
from  the  International  Meteorological  Tables  and  other  official  sources 
ar.i  credited  in  the  introduction. 

To  Prof.  WM.  LIBBEY,  JR.,  especial  acknowledgments  are  due  for 
a  large  amount  of  attention  given  to  the  present  work.  Prof.  L,IBBEY 
had  already  completed  a  revision,  involving  considerable  recomputation, 
pf  the  meteorological  tables  contained  in  the  last  edition  of  Guy  of  s 
Tables,  when  it  was  determined  to  adopt  new  values  for  many  of  the 
constants,  and  to  have  the  present  volume  set  with  new  type.  This 
involved  a  large  amount  of  new  computation,  which  was  placed  under 
"he  direction  of  Mr.  GEORGE  E.  CURTIS,  who  has  also  written  the 
text,  aiid  has  carefully  prepared  the  whole  manuscript  and  carried  it 
^hrough  the  press.  To  Mr.  Curtis' s  interest,  and  to  his  special  experi- 
ence as  a  meteorologist,  the  present  volume  is  therefore  largely  due. 

Prof.  LIBBEY  has  contributed  Tables  38,  39,  55,  56,  61,  74,  77,  89, 
and  90,  and  has  also  read  the  .  proof-sheets  of  the  entire  work. 

I  desire  to  express  my  acknowledgments  to  Prof.  CLEVELAND  ABBE, 
for  the  manuscript  of  Tables  32,  81,  82,  83,  84,  85,  86;  to  Mr.  H.  A. 
HAZEN,  for  Tables  49,  50,  94,  95,  96,  which  have  been  taken  from  his 
Hand-book  of  Meteorological  Tables;  and  also  to  the  Superintendent  of 
the  United  States  Coast  and  Geodetic  Survey,  the  Chief  Signal  Officer 
of  the  Army,  and  the  Chief  of  the  Weather  Bureau,  for  much  valuable 
counsel  during  the  progress  of  the  work. 

S.  P.  LANGLEY, 

Secretary. 


TABLE  OF  CONTENTS. 


INTRODUCTION. 

PAGE 

Description  and  use  of  the  Tables xi  to  lix 

THERMOMETRICAL  TABLES. 
TABLE  PAGE 

Conversion  of  thermometric  scales — 

1  Absolute,  Centigrade,  Fahrenheit,  and  Reaumur  scales  .     .         2 

2  Fahrenheit  scale  to  Centigrade 3 

3  Centigrade  scale  to  Fahrenheit 7 

4  Centigrade  scale  to  Fahrenheit,  near  the  boiling  point  of 

water 9 

5  Differences  Fahrenheit  to  differences  Centigrade      ....         9 

6  Differences  Centigrade  to  differences  Fahrenheit      ....         9 

7  Reduction  of  temperature  to  sea  level — English  measures       .     .       ic 

8  Reduction  of  temperature  to  sea  level — Metric  measures    ...       n 

9  Correction  for  the  temperature  of  the  thermometer  stem.     For 

Fahrenheit  and  Centigrade  thermometers 12 

BAROMETRICAL    TABLES. 

Reduction  of  the  barometer  to  standard  temperature  — 

10  English  measures ^ 

1 1  Metric  measures 34 

Reduction  of  the  barometer  to  standard  gravity  at  latitude  45° — 

1 2  English  measures 58 

1 3  Metric  measures 59 

Reduction  of  the  barometer  to  sea  level  —  English  measures. 

1 4  Values  of  2000  m 50 

15  Correction  of  2000  m  for  latitude 69 

Reduction  of  the  barometer  to  sea  level  —  Metric  measures. 

1 7  Values  of  2000  m _g 

1 8  Correction  of  2000  m  for  latitude 9c 

19  B0  —  B  =  B(iom  —  i) 

^  J  • 9J 

vii 


viii  TABLE    OF    CONTENTS. 

BAROMETRICAL    TABLES.— Continued. 
TABLE  PAGE 

Determination  of  heights  by  the  barometer  —  English  measures. 

20  Values  of  60368  [i  +  0.0010195  x  36]  log  — ~~ 100 

Jj 

21  Term  for  temperature        104 

22  Correction  for  latitude  and  weight  of  mercury 106 

23  Correction  for  an  average  degree  of  humidity 108 

24  Correction  for  the  variation  of  gravity  with  altitude    .     .     .  109 
Determination  of  heights  by  the  barometer  —  Metric  measures. 

25  Values  of  18400  log  -  no 

L> 

26  Term  for  temperature in 

27  Correction  for  humidity      . 112 

28  Correction  for  latitude  and  weight  of  mercury 114 

29  Correction  for  the  variation  of  gravity  with  altitude    .     .     .     115 

30  Difference  of  height  corresponding  to  a  change  of  o.  i  inch  in  the 

barometer  —  English  measures .     n6 

31  Difference  of  height  corresponding  to  a  change  of  i  millimetre  in 

the  barometer — Metric  measures 117 

Determination  of  heights  by  the  barometer. 

32  Formula  of  Babinet 118 

Barometric  pressures  corresponding  to  the  temperature  of  the 

boiling  point  of  water  — 

33  English  measures 119 

34  Metric  measures 119 


HYGROMETRICAL    TABLES. 

Pressure  of  aqueous  vapor  (Brock)  — 

35  English  measures 122 

36  1  f  128 

>         Metric  measures   .  .  < 

43  /  I  142 

37  Pressure  of  aqueous  vapor  at  low  temperatures  (C.  F.  Marvin) — 

English  and  Metric  measures .     .     .       130 

38  Weight  of  a  cubic  foot  of  saturated  vapor — 

English  measures 132 

39  Weight  of  a  cubic  metre  of  saturated  vapor — 

Metric  measures „ 133 

Reduction  of  psychrometric  observations — English  measures. 

40  Pressure  of  aqueous  vapor 134 

41  Values  of  0.000367  B(t—t)  (i  +  -  — ') 136 

42  Relative  humidity — Temperature  Fahrenheit 138 


TABLE    OF    CONTENTS.  ix 

HYGROMETRICAL    TABLES.— Continued. 

TABLE  PAGE 

Reduction  of  pS5^chrometric  observations  —  Metric  measures. 

43  Pressure  of  aqueous  vapor 142 

44  Values  of  0.000660  B(t—  /,)  (  i  +  -   —  ) 143 

873  7 

45  Relative  humidity — Temperature  Centigrade 144 

Reduction  of  snowfall  measurements. 

46  Depth  of  water  corresponding  to  the  weight  of  snow  (or  rain) 

collected  in  an  8 -inch  gage 146 

47  Rate  of  decrease  of  vapor  pressure  with  altitude 146 

WIND    TABLES. 

Mean  direction  of  the  wind  by  Lambert's  formula — 

48  Multiples  of  cos  45° ;  form  and  example  of  computation  .     .  148 

49  Values  of  the  mean  direction  (a)  or  its  complement  (90  — a)  149 

50  Synoptic  conversion  of  velocities '..'.'.     .     .  154 

5!     Miles  per  hour  into  feet  per  second .     .  155 

52  Feet  per  second  into  miles  per  hour 155 

53  Metres  per  second  into  miles  per  hour 156 

54  Miles  per  hour  into  metres  per  second     .     .     .     .     .     .     .     .     .  157 

55  Metres  per  second  into  kilometres  per  hour 158 

56  Kilometres  per  hour  into  metres  per  second    .     .     .     .     .     .     .  159 

57  Beaufort  scale  for  winds  at  sea 160 

GEODETICAL    TABLES. 

58  Relative  acceleration  of  gravity  at  different  latitudes      ....  162 

59  Length  of  one  degree  of  the  meridian  at  different  latitudes     .     .  164 

60  Length  of  one  degree  of  the  parallel  at  different  latitudes  .     .     .  165 

61  Duration  of  sunshine  at  different  latitudes 166 

62  Declination  of  the  sun  for  the  year  1899    . 177 

63  Relative  intensity  of  solar  radiation  at  different  latitudes  .     .     .  178 

CONVERSION   OF   LINEAR    MEASURES. 

64  Inches  into  millimetres 180 

65  Millimetres  into  inches 187 

66  Feet  into  metres     .     .          200 

67  Metres  into  feet 202 

68  Miles  into  kilometres 204 

69  Kilometres  into*  miles 206 

70  Interconversion  of  nautical  and  statute  miles  ...'...  208 

71  Continental  measures  of  length  with  their  metric  and  English 

equivalents 208 


X  TABLE    OF    CONTENTS. 

CONVERSION  OF  MEASURES  OF  TIME  AND  ANGLE. 

TABLE.  PAGE. 

72  Arc  into  time 210 

73  Time  into  arc 211 

74  Days  into  decimals  of  a  year  and  angle 212 

75  Hours,  minutes  and  seconds  into  decimals  of  a  day       .     .     .     .  216 

76  Decimals  of  a  day  into  hours,  minutes  and  seconds 216 

77  Minutes  and  seconds  into  decimals  of  an  hour 217 

78  Local  mean  time  at  apparent  noon    .     . 217 

79  Sidereal  time  into  mean  solar  time 218 

80  Mean  solar  time  into  sidereal  time 218 

MISCELLANEOUS   TABLES. 

Weight  in  grammes  of  a  cubic  centimetre  of  air. 

81  English  measures — Temperature  term 220 

82  "  "         — Humidity  term :  auxiliary  table  .     .     .  221 
03  "          —Humidity  and  pressure  terms,  combined  222 

84  Metric  measures — Temperature  term 224 

85  "  "        — Humidity  term  :  auxiliary  table     .     .     .  225 

86  "  "        —Humidity  and  prersure  terms  combined  .  226 

87  Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes  229 

88  Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces  230 

89  Conversion  of  grains  into  grammes 230 

90  Conversion  of  grammes  into  grains 231 

91  Conversion  of  units  of  magnetic  intensity 231 

92  Quantity  of  water  corresponding  to  given  depths  of  rainfall  .     .  232 

93  Atmospheric  water  vapor  lines  in  the  visible  spectrum       .     .  •    .  233 
Absorption  by  atmospheric  water  vapor  in  infra-red  spectrum     .  234 

94  Division  by  28  of  numbers  from  28  to  867972 236 

95  Division  by  29  of  numbers  from  29  to  898971 237 

96  Division  by  31  of  numbers  from  31  to  960969 238 

97  Natural  sines  and  cosines 239 

98  Natural  tangents  and  cotangents 241 

99  Logarithms  of  numbers 243 

100  Bigelow's  Standard  System  of  Notation  and  Formulae  ....  245 

101  List  of  meteorological  stations 250 

102  International  Meteorological  Symbols 268 

103  Beaufort's  Notation  for  use  at  sea 272 

104  Acceleration  of  apparent  gravity 273 


INTRODUCTION. 
DESCRIPTION   AND   USE   OF   THE  TABLES. 

TABLE!.      Conversion  of  the  Absolute  thermometric  scale  to  the  Centigrade, 
Fahrenheit  and  Reaumur  scales. 

The  equivalent  values  of  the  four  scales  are  given  for  every  five  degrees 
on  the  Absolute  scale. 

By  the  help  of  the  table  of  proportional  parts  at  the  bottom  of  this  table, 
it  is  also  convenient  for  converting  Fahrenheit  to  Centigrade  and  Reaumur, 
and  Centigrade  to  Fahrenheit  and  Reaumur. 

The  formulae  expressing  the  relations  between  the  different  scales  are 
given  at  the  bottom  of  the  table,  where  • 

A.°  =  Temperature  Absolute. 
C.  °  =  Temperature  Centigrade. 
F.  °  =  Temperature  Fahrenheit. 
R.°  =  Temperature  Reaumur. 
Examples : 

To  convert  285. °5  Absolute  into  Centigrade,  Fahrenheit,  and  Reaunm  . 
From  the  table,  283.°  A.  =  io.°  C.  =  50.°  F.  =     8.°     K. 

From  the  proportional  parts,       2.     A.  =    2.         =    3.6       =     1.6 
From  the  proportional  parts,      0.5^.=       .5      =      .9       =      .4 

285.5  A.  =  12.5  C.  =  54.5  F.  =  10.0     R. 

To  convert  i6.°9  Centigrade  to  Absolute,  Fahrenheit,  and  Reaumur. 
From  the  table,  15.°  C.=  288.°  A.=  59-°  &  =  12.°     R. 

From  proportional  parts,       1.9        =       1.9        =     3.4        =     1.5 


16.9  C.  =  289.9  <A>  —  62.4  F.  =  13.5     R. 
To  convert  147. °y  Fahrenheit  to  Absolute,  Centigrade,  and  Reaumur. 

140.°  F.=   333-°  A.  =  60. °   C.=  48.°     R. 

7.7        =       4.3        =    4.3        =     3.4 


147.7  F.=  337-3  -4.  =  64.3  C.=  51.4     R. 
To  convert  i8.°3  Reaumur  to  Absolute,  Centigrade,  and  Fahrenheit. 

16.°  R.=    293.°  A.  r=2o.°   C.=  68.°     F. 
2.3        =        2.9        =    2.9       =     5.2 


18.3  R.  =  295.9  A.  —  22.9  C.  =  73.2     F. 


Xil  INTRODUCTION. 

TABLE  2.      Conversion  of  readings  of  the  Fahrenheit  thermometer  to  readings 
Centigrade. 

The  conversion  of  Fahrenheit  temperatures  to  Centigrade  temperatures 
is  given  for  every  tenth  of  a  degree  from  +  130!  '9  F.  to  —  7o.°9  F.  The 
side  argument  is  the  whole  number  of  degrees  Fahrenheit,  and  the  top 
argument,  tenths  of  a  degree  Fahrenheit  ;  interpolation  to  hundredths  of  a 
degree,  when  desired,  is  readily  effected  mentally.  The  tabular  values  are 
given  to  hundredths  of  a  degree  Centigrade. 

The  formula  for  conversion  is 


where  F°  is  a  given  temperature   Fahrenheit,  and  C°  the  corresponding 
temperature  Centigrade. 

Example  : 

To  convert  79^7  Fahrenheit  to  Centigrade. 
The  table  gives  directly  26.°5O  C. 

For  conversions  of  temperatures  above  ^i0/7,  use  Table  i. 

TABLE  3.     Conversion  of  readings  of  the  Centigrade  thermometer  to  readings 
Fahrenheit. 

The  conversion  of  Centigrade  temperatures  to  Fahrenheit  temperatures 
is  given  for  every  tenth  of  a  degree  Centigrade  from  +  5O.°9  to  —  5o.°9  C. 
The  tabular  values  are  expressed  in  hundredths  of  a  degree  Fahrenheit. 

The  formula  for  conversion  is 

^°  =  |  C°  +  32° 

where   C°  is  a  given  temperature  Centigrade,  and  F*  the  corresponding 
temperature  Fahrenheit. 

For  conversions  of  temperatures  above  the  upper  limit  of  the  table, 
use  Tables  i  and  4. 

TABLE  4.      Conversion  of  readings  of  the   Centigrade  thermometer  near  the 
boiling  point  to  readings  Fahrenheit. 

This  is  an  extension  of  Table  3  from  9O.°o  to  ioo.°9  Centigrade. 
Example  : 

To  convert  95*74  Centigrade  to  Fahrenheit. 

From  the  table,  95°7°  C.   —   204*26  F. 

By  interpolation,  0.04        =       0.07 

05^74  C.  =  204r33  F. 
TABLE  5.     Conversion  of  differences  Fahrenheit  to  differences  Centigrade. 

The  table  gives  for  every  tenth  of  a  degree  from  o°  to  20.°  9  F.  the 
corresponding  lengths  of  the  Centigrade  scale. 


THERMOMETRICAL    TABLES.  xiii 

Conversion  of  differences  Centigrade  to  differences  Fahrenheit.  TABLE  6 

The  table  gives  for  every  tenth  of  a  degree  from  o°  to  9^9  C.  the  corre- 
sponding lengths  of  the  Fahrenheit  scale. 

Example : 

To  find  the  equivalent  difference  in  Fahrenheit  degrees  for  a  difference 

of  4^72  Centigrade. 

From  the  table,  4.°7o  C.  =  8°$6  F. 

From  the  table  by  moving  the  decimal  point  for  0.2,      0.02       =  0.04 

4.°72  C.  =  8^50  F. 

REDUCTION    OP    TEMPERATURE    TO    SEA    LEVEL. 

English  Measures.  TABLE  7. 

Metric  Measures.  TABLE  8. 

These  tables  give  for  different  altitudes  and  for  different  uniform  rates 
of  decrease  of  temperature  with  altitude,  the  amount  in  hundredths  of  a 
degree  Fahrenheit  and  Centigrade,  which  must  be  added  to  observed  tem- 
peratures in  order  to  reduce  them  to  sea  level. 

The  rate  of  decrease  of  temperature  with  altitude  varies  from  one 
region  to  another,  and  in  the  same  region  varies  according  to  the  season 
and  the  meteorological  conditions  ;  being  in  general  greater  in  warm  lati- 
tudes than  in  cold  ones,  greater  in  summer  than  in  winter,  and  greater 
in  cyclones  than  in  anti-cyclones.  For  continental  plateau  regions,  the 
reduction  often  becomes  fictitious  or  illusory.  The  use  of  the  tables  there- 
fore requires  experience  and  judgment  in  selecting  the  rate  of  decrease  of 
temperature  to  be  used.  Much  experimental  work  is  now  in  progress  with 
kites  and  balloons  to  determine  average  vertical  gradients.  It  must  be 
remembered  that  the  tables  here  given  are  not  tables  giving  the  data  as 
recently  determined  for  various  elevations. 

The  tables  are  given  in  order  to  facilitate  the  reduction  of  temperature 
either  upwards  or  downwards  in  special  investigations,  but  the  reduction  is 
not  ordinarily  applied  to  meteorological  observations. 

The  tables,   7  and  8,   are   computed  for   rates  of  temperature  change 
ranging  from  i°  Fahrenheit  in  200  feet  to  i°  Fahrenheit  in  900  feet,  and 
from   i°  Centigrade  in   100  metres  to    i°   Centigrade   in  500  metres;    and 
for  altitudes  up  to  5,000  feet  and  3,000  metres  respectively. 
Example,  Table  7  : 

Observed  temperature  at  an  elevation  of  2,500  feet, 
Reduction   to  sea   level  for  an  assumed   decrease  in  tem- 
perature of  i°F.  for  every  300  feet, 

Temperature  reduced  to  sea  level, 

Example,  Table  8  : 

Observed  temperature  at  an  elevation  of  500  metres, 
Reduction  to  sea  level  for  an  assumed  decrease  in  tempera- 
ture of  i  °  C.  for  every  200  metres, 

Temperature  reduced  to  sea  level,  i5.°o  C. 


Xlv  INTRODUCTION. 

CORRECTION   FOR   THE   TEMPERATURE   OF   THE   THERMOMETER   STEM. 

TABLE  9      Fahrenheit  thermometers;  Centigrade  thermometers. 

When  the  temperature  of  the  thermometer  stem  is  materially  different 
from  that  of  the  bulb,  a  correction  needs  to  be  applied  to  the  observed  read- 
ing in  order  to  correct  it  for  the  difference.  This  correction  frequently 
becomes  necessary  in  physical  experiments  where  the  bulb  only  is  immersed 
in  a  bath  whose  temperature  is  to  be  determined,  and  in  meteorological 
observations  it  may  become  appreciable  in  wet-bulb,  dew  point,  and  solar 
radiation  thermometers,  when  the  temperature  of  the  bulb  is  considerably 
above  or  below  the  air  temperature. 

If  t'  be  the  average  temperature  of  the  mercury  column,  t  the  observed 
reading  of  the  thermometer,  n  the  length  of  mercury  in  the  stem  in  scale 
degrees,  and  a  the  apparent  expansion  of  mercury  in  glass  for  1°,  the 
correction  is  given  by  the  expression 

-  an  (f  -  t) 

in  which,  for  Centigrade  temperatures,  a  =  0.000154  or  0.000155. 

The  average  temperature  of  the  mercury  column  can  not  be  directly 
observed  and  is  difficult  to  determine,  for  it  differs  from  the  temperature 
of  the  glass  stem  by  an  amount  depending  on  the  conduction  of  heat 
between  the  bulb  and  the  mercury  column.  Practically  however  it  is 
possible  to  use  the  actually  observed  temperature  of  the  glass  stem  as  the 
value  of  t'  by  making  a  small  compensating  change  in  the  value  of  a, 
and  this  appears  to  be  the  simplest  method  that  has  been  proposed.  Mr. 
T.  B.  Thorpe  {Journal  of  the  Chemical  Society,  vol.  37,  1880,  p.  160)  has 
determined  by  a  series  of  experiments  that  the  proper  thermometric  cor- 
rections will  be  obtained  by  this  method  if  0.000143  be  used  as  a  coefficient 
(for  Centigrade  temperatures)  instead  of  the  value  of  a  given  above,  and 
this  value  has  been  adopted  in  the  present  tables. 

The  correction  formulae  are,  then, 

T=  t  —  0.0000795  n  (t!  —  t}  Temperature  Fahrenheit. 
T=  t—  0.000143    n   (f  ~~  O  Temperature  Centigrade. 
in  which   T=  Corrected  temperature. 
t  =  Observed  temperature. 
f  =  Mean  temperature  of  the  glass  stem. 
n  =  Length  of  mercury  in  the  stem  in  scale  degrees. 


When  f  is  than  /,  the  numerical  correction  is  to  be 

Example  : 

The  observed  temperature  of  a  black  bulb  thermometer  is  i2o.°4  F.y  the 
temperature  of  the  glass  stem  is  55.°2  F.  and  the  length  of  mercury 
in  the  stem  is  130°  F.  To  find  the  corrected  temperature. 

With  n  =  130°  F.  and  —  /  t  =  [—  ]  65°  F.,  as  arguments,  the  table  gives 
the  correction  o.°7  F.  ,  which  by  the  above  rule  is  to  be  added  to  the 
observed  temperature.  The  corrected  temperature  is  therefore  i2i°iF. 


TABLES   FOR   MERCURIAL   BAROMETERS. 

REDUCTION  TO  A  STANDARD  TEMPERATURE  OF  OBSERVATIONS  MADE  WITH 
MERCURIAL  BAROMETERS  HAVING  BRASS  SCALES. 

The  indicated  height  of  the  mercurial  column  in  a  barometer  varies  not 
only  with  changes  of  atmospheric  pressure,  but  also  with  variations  of  the 
temperature  of  the  mercury  and  of  the  scale.  It  is  evident  therefore  that  if 
the  height  of  the  barometric  column  is  to  be  a  true  relative  measure  of 
atmospheric  pressure,  the  observed  readings  must  be  reduced  to  the  values 
they  would  have  if  the  mercury  and  scale  were  maintained  at  a  constant 
standard  temperature.  This  reduction  is  known  as  the  reduction  for  tem- 
perature, and  combines  both  the  correction  for  the  expansion  of  the  mercury 
and  that  for  the  expansion  of  the  scale,  on  the  assumption  that  the  attached 
thermometer  gives  the  temperature  both  of  the  mercury  and  of  the  scale. 

The  freezing  point  is  universally  adopted  as  the  standard  temperature 
of  the  mercury,  to  which  all  readings  are  to  be  reduced.  The  temperature 
to  which  the  scale  is  reduced  is  the  normal  or  standard  temperature  of  the 
adopted  standard  of  length.  For  English  scales,  which  depend  upon  the 
English  yard,  this  is  62°  Fahrenheit.  For  metric  scales,  which  depend 
upon  the  metre,  it  is  o°  Centigrade.  As  thus  reduced,  observations  made 
with  English  and  metric  barometers  become  perfectly  comparable  when  con- 
verted by  the  ordinary  tables  of  linear  conversion,  viz  :  millimetres  to  inches 
and  inches  to  millimetres  (see  Tables  64,  65),  for  these  conversions  refer  to 
the  metre  at  o°  Centigrade  and  the  English  yard  at  62°  Fahrenheit. 

Prof.  C.  F.  Marvin  in  the  Monthly  Weather  Review  for  July,  1898, 
has  pointed  out  the  necessity  of  caution  in  conversion  of  metric  and  English 
barometer  readings  : 

Example:         Attached  thermometer,     2^.°^.C. 

Barometer  reading,          762 . 1 5  mm. 

If  the  temperature  is  converted  to  Fahrenheit  =  77. °y  and  the  reading  to 
30.006,  the  temperature  correction  according  to  table  10  would  be  —  0.133 
inch  and  the  reduced  reading  29.873.  This  would  be  erroneous.  The  correct 
conversion  is  found  by  taking  the  correction  corresponding  to  2^.°^.C.  and 
762mm. — i.  e., — 3. 15  mm.  and  corrected  reading  759mm. — which,  con- 
verted into  inches  gives  the  correct  result,  29.882. 

Professor  Marvin  further  remarks  that  circumstances  sometimes  arise  in 
which  a  Centigrade  thermometer  may  be  used  to  determine  the  temperature 
of  an  English  barometer,  or  a  Fahrenheit  attached  thermometer  may  be 
used  with  a  metric  .^cale.  In  all  such  cases  the  temperature  must  be  brought 
into  the  same  system  of  units  as  the  observed  scale  reading  before  correc- 
tions can  be  applied,  and  the  observed  reading  must  then  be  corrected  for 
temperature  before  any  conversion  can  be  made. 

With  aneroid  barometers  corrections  for  temperature  and  instrumental 
error  must  be  determined  for  each  instrument.  The  general  formula  for 
reducing  mercurial  barometers  with  brass  scales  to  the  standard  tempera- 

tureis 


Xvi  INTRODUCTION. 

in  which  C=  Correction  for  temperature. 

B  —  Observed  height  of  the  barometric  column. 

/  =  Temperature  of  the  attached  thermometer. 
T  =  Standard  temperature  of  the  mercury. 
m  =  Coefficient  of  expansion  of  mercury. 

/  =  Coefficient  of  linear  expansion  of  brass. 

0  =  Standard  temperature  of  the  scale. 

The  accepted  determination  of  the  coefficient  of  expansion  of  mercury 
is  that  given  by  Broch's  reduction  of  Regnault's  experiments,  viz  : 

m  (for  i°  C.)  =  10X181792  +  o.i75^+  0.0351  16/2). 
As  a  sufficiently  accurate  approximation,  the  intermediate  value 

m  =  0.0001818 

has  been  adopted  uniformly  for  all  temperatures  in  conformity  with  the  usage 
of  the  International  Meteorological  Tables. 

Various  specimens  of  brass  scales  made  of  alloys  of  different  com- 
position show  differences  in  their  coefficients  of  expansion  amounting  to 
eight  and  sometimes  ten  per  cent,  of  the  total  amount.  The  Smithsonian 
Tables  prepared  by  Prof.  Guyot  were  computed  with  the  average  value 
/(for  i  °C)  =  0.00001  88  ;  for  the  sake  of  uniformity  with  the  International 
Meteorological  Tables,  the  value 

/  =  0.0000  1  84 

has  been  used  in  the  present  volume.     For  any  individual  scale,  either  value 
may  easily  be  in  error  by  four  per  cent. 

A  small  portion  of  the  tables  has  been  independently  computed,  but  the 
larger  part  of  the  values  have  been  copied  from  the  International  Meteoro- 
logical Tables  •,  one  inaccuracy  having  been  found  and  corrected. 

TABLE  1O.      Reduction  of  the   barometer   to  standard   temperature  —  English 
measures. 

For  the  English  barometer  the  formula  for  reducing  observed  readings 
to  a  standard  temperature  becomes 


i  +  m  (t  —  32°) 

in  which  B  =  Observed  height  of  the  barometer  in  English  inches. 

/  =  Temperature  of  attached  thermometer  in  degrees  Fahrenheit. 

m  =  0.0001818  X  |  =  o.oooioi 
/  =  0.0000184  X  |  =  0.0000102 

The  combined  reduction  of  the  mercury  to  the  freezing  point  and  of  the 
scale  to  62°  Fahrenheit  brings  the  point  of  no  correction  to  approximately 


BAROMETRICAL   TABLES.  xvii 

28°. 5  Fahrenheit.  For  temperatures  above  28°. 5  Fahrenheit,  the  correction 
is  subtractive,  and  for  temperatures  below  28°. 5  Fahrenheit,  the  correction 
is  additive,  as  indicated  by  the  signs  (-J-)  and  ( — )  inserted  throughout  the 
table. 

The  table  gives  the  corrections  for  every  half  degree  Fahrenheit  from 
o°  to  loo.0  The  limits  of  pressure  are  19  and  31.6  inches,  the  corrections 
being  computed  for  every  half  inch  from  19  to  24  inches,  and  for  every 
two- tenths  of  an  inch  from  24  to  31.6  inches. 

Example  : 

Observed  height  of  barometer  =      29.143 

Attached  thermometer,  54°5  F. 

Reduction  for  temperature  -    0.068 

Barometric  reading  corrected  for  temperature  =      29.075 


TABLE    11. 

TABLE  11.      Reduction   of   the    barometer   to    standard    temperature  —  Metric 
measures. 

For  the  metric  barometer  the  formula  for  reducing  observed  readings  to 
the  standard  temperature,  o°  C.  ,  becomes 

r-     R  ('"  -  0* 

C-.  —  —  j2 


i  +  mt 

in  which  C    and   B  are   expressed    in    millimetres    and   t    in    Centigrade 
degrees. 

m  =  0.0001818  ;     /  =  0.0000184. 

In  the  tables,  the  limits  adopted  for  the  pressure  are  440  and  795  mil- 
limetres, the  intervals  being  10  millimetres  between  440  and  600  milli- 
metres, and  5  millimetres  between  600  and  795  millimetres 

The  limits  adopted  for  the  temperature  are  o°  and  -{-  35°.  8,  the  inter- 
vals being  o°.5  and  i°.o  from  440  to  560  millimetres,  and  o°.2  from  560  to 
795  millimetres. 

For  temperatures  above  o°  Centigrade  the  correction  is  negative,  and 
hence  is  to  be  subtracted  from  the  observed  readings. 

For  temperatures  below  o°  Centigrade  the  correction  is  positive,  and 
from  o°  C.  down  to  —  20°  C.  the  numerical  values  thereof,  for  ordinary  baro- 
metric work,  do  not  materially  differ  from  the  values  for  the  corresponding 
temperatures  above  o°  C.  Thus  the  correction  for  —  9°  C.  is  numerically 
the  same  as  for  +  9°  C.  and  is  taken  from  the  table.  In  physical  work  of 
extreme  precision,  the  numerical  values  given  for  positive  temperatures  may 
be  used  for  temperatures  below  o°  C.  by  applying  to  them  the  following 
corrections  : 


XV111 


INTRODUCTION. 


Corrections  to  be  applied  to  the  tabular  values  of  Table  11  in  order  to  use  them 
when  the  temperature  of  the  attached  thermometer  is  below  o°  Centigrade. 


Temper- 

PRESSURE  IN 

MILLIMETRES. 

ature. 

450                 500 

550 

600 

650 

700                 750 

800 

C. 

mm.             mm. 

mm. 

mm. 

mm. 

mm.             mm. 

mm. 

-    i° 

0.00     !        0.00 

0.00 

o.oo 

0.00 

O.OO             O.OO 

o.oo 

-  9 

.00 

.00 

.00 

.00 

.00 

.00     j          .00 

.00 

—  10 

0.00               0.00 

o.oo 

0.00 

0.00 

+  O.OI          +  O.OI 

+  O.OI 

ii 

.00                  .00 

.00 

.00 

+  0.01 

.OI 

.01 

.01 

12 

.00      '            .00 

.00 

+  0.01 

.01 

.01 

.01 

.01 

13 

.00             .00 

+  0.01 

.01 

.01 

.01 

.01 

.01 

-14 

.00          +  0.01 

.01 

.01 

.01 

.01 

.01 

.01 

-15 

+  0.01          +0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  0.01 

+  O.OI 

16 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

.01 

17 

.01                   .01 

.01 

.01 

.01 

.01 

.01 

.02 

18 

.01                   .01 

.01 

.01 

.01 

.01 

.01 

.02 

-19 

.01 

.01 

.01 

.01 

.01 

.01 

.02 

.02 

•—20 

+  0.01 

+  O.OI 

+  0.01 

+  0.01 

+  0.01 

+  0.02 

+  0.02 

+  0.02 

21 

.01 

.01 

.01 

.02 

.02 

.02 

.02 

.02 

22 

.01 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

23 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

.02 

-24 

.01 

.02 

.02 

.02 

.02 

.02 

.02 

•03 

Example : 

Observed    height    of    barometer,    763. 17™"*-: 

attached  thermometer,  —  12°  C. 
Numerical  value  of  the  reduction  for  +  12°  C. 
Correction  for  temperature  below  o°  C. 

Reduction  for  —  12°  C. 
Observed  height  of  barometer 

Barometer  corrected  for  temperature 


Temperature   of    the 


=      764.68 


REDUCTION   OF   THE    MERCURIAL   BAROMETER   TO   STANDARD    GRAVITY. 

The  atmospheric  pressure  is  measured  by  the  weight  of  the  mei- 
curial  column  of  the  barometer,  but  by  common  usage  the  pressures  are 
expressed  in  terms  of  the  height  of  the  barometric  column  instead  of  by 
its  weight.  The  observed  height  however  is  not  a  true  measure  of  the 
pressure,  because  it  changes  with  the  temperature  of  the  mercury  and 
with  the  variations  in  the  value  of  gravity.  Therefore  to  obtain  a  height 
that  shall  be  a  true  relative  measure  of  the  atmospheric  pressure,  the  ob- 
served height  of  the  mercurial,  column  must  be  reduced  to  that  which 
would  be  measured  at  a  standard  temperature  and  under  a  uniform  stand- 
ard value  of  gravity. 


BAROMETRICAL    TABLES.  xix 

The  standard  value  of  gravity  adopted  is  that  prevailing  at  latitude 
45°  and  sea  level.  The  reduction,  accordingly,  consists  of  two  parts  —  a 
correction  for  altitude  and  a  correction  for  latitude.  The  gravity  correc- 
tion for  altitude  is  usually  combined  with  the  reduction  of  the  barometer 
to  sea  level ;  the  gravity  correction  for  latitude,  which  is  here  given,  is 
commonly  called  simply  the  "gravity  correction,"  or  the  "reduction  to 
standard  gravity." 

If  B$  and  B^  represent  the  barometric  heights  (corrected  for  tem- 
perature) at  latitudes  <£  and  45°,  and  g$,  g^  the  acceleration  of  gravity 
at  these  latitudes,  we  have 


and  the  correction  to  the  observed  height  will  be 


If  the  earth  be  an  ellipsoid  of  revolution  composed  of  homogeneous 
homofocal  layers  arranged  according  to  any  law  of  density, 

£>=£•«  O-^  cos  2#) 

in  which  k  is  a  constant  depending  on  the  ellipticity  of  the  earth  ;   and 
the  correction  becomes 

C  =  —  k  cos  2  <f>  B$. 

The  value  of  k  adopted  here  is  that  determined  by  Prof.  Harkness,* 

£  =  0.002662. 

The  correction  is  the  same  numerically  for  <f>  =  45°  4-  <*  and  ^  =  45°  —  o. 
It  is  negative  for  latitudes  below  45°  and  positive  for  latitudes  above  45! 

TABLES    12,13. 

TABLE  12  (English  measures)  gives  the  correction  in  thousandths  oi 
an  inch  for  every  degree  of  latitude  and  for  each  inch  of  barometric  pres- 
sure from  19  to  30  inches. 

TABLE  13   (Metric  measures)  gives  the  correction  in  hundredths  of  a 
millimetre  for  each  20  millimetres  barometric  pressure  from  520  to  780  mil- 
limetres. 
Example : 

Barometric  reading  (corrected  for  temperature)  at  Dodge 

City,  latitude  37°  45',  =     27.434 

Gravity  correction  for  latitude  from  Table  12,  =  —  0.018 


Barometer  reduced  to  latitude  45°,  =     27.416 

*WM.  HARKNESS:    The  solar  parallax  and  Us  related  constants.    Washington, 
1891,  4°,  pp.  169. 


XX  INTRODUCTION. 

THE    HYPSOMETRIC    FORMULA    AND    ITS    CONSTANTS. 

The  fundamental  formula  for  reducing  the  barometer  to  sea  level  and 
for  determining  heights  by  the  barometer  is  the  original  formula  of  Laplace, 
amplified  into  the  following  form  — 

log 


in  which  h  =  Height  of  the  upper  station. 
h,  =  Height  of  the  lower  station. 
Z=  h  —  h0. 

p  =  Atmospheric  pressure  at  the  upper  station. 
p0  =  Atmospheric  pressure  at  the  lower  station. 
R  =  Mean  radius  of  the  earth. 

6  —  Mean  temperature  of  the  air  column  between  the  altitudes 
h  and  h0. 

e  —  Mean  pressure  of  aqueous  vapor  in  the  air  column. 

b  =  Mean  barometric  pressure  of  the  air  column. 

<£  =  Latitude  of  the  stations. 
K=  Barometric  constant. 

a  =  Coefficient  of  the  expansion  of  air. 

k  =  Constant  depending  on  the  figure  of  the  earth. 

The  pressures  p0  and  p  are  computed  from  the  height  of  the  column  of 

r> 

mercury  at  the  two  stations  ;  the  ratio  -£  of  the  barometric  heights  may  be 

JD 

substituted  for  the  ratio  «,  if  B0  and  B  are  reduced  to  the  values  that  would 

P 
be  measured  at  the  same  temperature  and  under  the  same  relative  value  of 

gravity. 

The  correction  of  the  observed  barometric  heights  for  instrumental  tem- 
perature is  always  separately  made,  but  the  correction  for  the  variation  of 
gravity  with  altitude  is  generally  introduced  into  the  formula  itself. 

If  B0,  B  represent  the  barometric  heights  corrected  for  temperature  only, 
we  have  the  equation 


being  a  constant  depending  on  the  variation  of  gravity  with  altitude. 


Since  -^-  is  a  very  small  fraction,  we  may  write 
K 


M  being  the  modulus  of  common  logarithms. 


BAROMETRICAL    TABLES.  Xxi 

D 

By  substituting  for  Z  its  approximate  value  Z—K  log  -75°,  we  have 

Jo 


B0 

l<*^- 

With  these  substitutions  the  barometric  formula  becomes 


cos 


As  a  further  simplification  we  shall  put 


y  =  >£  cos  2<£  and  17  =    =-      , 

jTt 


and  write  the  formula  — 


log§- 


Values  of  the  constants.  —  The   barometric   constant   K  is   a   complex 
quantity  defined  by  the  equation 


^M  is  the  normal  barometric  height  of  Laplace,  760  mm. 

A  is  the  density  of  mercury  at  the  temperature  of  melting  ice.  M. 
Marek  (Travaux  et  Memoires  du  Bureau  international  des  Poids  et  Mesures, 
t.  II,  p.  D  55)  gives  the  value,  A  =  13.5956,  and  finds  that  different 
specimens  of  mercury  purified  by  different  processes  differ  from  this  by 
several  units  in  the  fourth  decimal.  The  International  Meteorological 
Committee  has  taken  the  value 

A  =  I3-5958, 
and  for  the  sake  of  uniformity  this  value  is  here  adopted. 

8  is  the  density  of  dry  air  at  o°  C.  and  under  the  pressure  of  a  column 
of  mercury  Bn  at  the  sea  level  and  at  latitude  45?  The  value  adopted 
by  the  International  Bureau  of  Weights  and  Measures  (  Travaux  et  MSmoires, 
t.  i,  p.  A  54)  is 

8  =  0.001293052. 

M  (the  modulus  of  common  logarithms)  =  0.4342945. 
These  numbers  give  for  the  value  of  the  barometric  constant 
fC  =•  18400  metres. 


INTRODUCTION. 

For  the  remaining  constants,  the  following  values  have  been  used  : 

0  =  0.00367  for  i°  Centigrade.     (International  Bureau  of  Weights  and 

Measures  :     Travaux  et  Mtmoires,  t.  I,  p.  A  54.) 
y  =  k  cos  2  <f>  —  0.002662  cos  2  <£.     (Harkness  :    The  solar  parallax,  etc. 

see  p.  xix.) 
R  =  6367324  metres.     (A.  R.  Clarke  :    Geodesy,  8°,  Oxford,  1880.) 


-  =  A^-f±-=  0.002396.     (Ferrel:     Report  Chief  Signal  Officer,    1885, 
K 

Pt-   2,  p.   393.) 

REDUCTION   OF  THE   BAROMETER    TO   SEA   LEVEL. 
In  reducing  the  barometer  to  sea-level,  h0  =o,  and  the  factor  (  i  -\ — — :  \ 

becomes  1 1 -f -^).       Taking   the   product   of   this   factor   and    K  (i  +  aO) 

\  J\   j 

( i  -f-  >? ) ,  and  neglecting  the  term  in  6Z,  the  formula  becomes 
in  metric  measures 

Z  (metres)  =  (18444  +  67-53  9  c-  +  0.003  Z)  (^j)  (i  +  r)  loS  f° ' 
and  in  English  measures 

Z  (feet)  -  (56573  +123.1   0° F-  +  0.003  Z)  (Y^-O)  (i  +  7)  log  -£  • 

The  form  adopted  for  the  tables  is  that  of  M.  An  got.* 
Taking  the  formula  in  English  measures,  let 

m 


56573  +  I23-1  °  +  0-003 
Putting 

m  B* 


We  may  with  sufficient  accuracy  write  — 

jj 

m^=  m  —  m  y  =•-  log  —  - 
B 

and  may  call  m}  the  value  of  m  corrected  for  the  variation  of  gravity  with 
latitude. 

Now  the  reduction  of  the  barometer  to  sea  level  is  BQ  —  B,  which  may 
be  transformed  into  the  following  : 


The  above  fraction  designated  m  contains  the  altitude  ^,  the  mean 
temperature  0,  and  the  humidity  factor  (i  —  /3).     In  the  Smithsonian  tables, 


*A.  ANGOT  :  Annales  du  Bureau  Central  Metkorologique.     Ann£e  1878,  t.  I,  p.  C. 
but  Angot  uses  slightly  different  numerical  constants. 


BAROMETRICAL    TABLES. 


XX111 


victeorological  and  physical,  by  Dr.  A.  Guyot,  the  distinguished  author 
in  treating  of  this  humidity  factor  in  connection  with  hypsometric  tables 
took  the  following  position  : 

1 '  To  introduce  a  separate  correction  for  the  expansion  of  aqueous  vapor 
"  is,  in  the  writer's  view,  a  doubtful  improvement.  The  laws  of  the  distri- 
"  bution  and  transmission  of  moisture  through  the  atmosphere  are  too  little 
"  known,  and  its  amount,  especially  in  mountain  regions,  is  too  variable,  and 
' '  depends  too  much  upon  local  winds  and  local  condensation,  to  allow  a 
' '  reasonable  hope  of  obtaining  the  mean  humidity  of  the  layer  of  air  between 
' '  the  two  stations  by  means  of  hygrometrical  observations  made  at  each  of 
"  them.  These  doubts  are  confirmed  by  the  experience  of  the  author  and 
"of  many  other  observers,  which  shows  that,  on  an  average,  L/aplace's 
"  method  works  not  only  as  well  as  the  other,  but  more  uniformly  well.  At 
"  any  rate  the  gain,  if  there  be  any,  is  not  clear  enough  to  compensate  for 
' '  the  undesirable  complication  of  the  formula. ' ' 

Since  this  position  was  taken  by  Dr.  Guyot  forty  years  ago,  there  has 
been  no  such  advance  in  our  knowledge  as  to  impair  the  practical  conclusion 
in  conformity  with  which  he  constructed  his  hypsometric  table.  Accord- 
ingly in  treating  this  portion  of  the  formula  in  the  construction  of  the 
present  tables  for  the  reduction  of  the  barometer  to  sea  level,  it  has  been 
deemed  advantageous  to  retain  the  method  adopted  by  Guyot,  and  to 
incorporate  the  humidity  factor  in  the  temperature  term,  thereby  assum- 
ing the  air  to  contain  the  average  degree  of  humidity  corresponding  to  the 
actually  prevailing  condition  of  temperature. 

In  evaluating  the  humidity  factor  as  a  function  of  the  air  temperature, 
the  tables  given  by  Prof.  Ferrel  have  been  adopted  {Meteorological  researches. 
Part  Hi. — Barometric  hypsomctry  and  reduction  of  the  barometer  to  sea  level. 
Report,  U.  S.  Coast  Survey,  1881.  Appendix  10.)  These  tables  by  inter- 
polation, and 'by  extrapolation  below  o°  F. ,  give  the  following  values  for  /9: 

For  Fahrenheit  temperatures, 


0 

ft 

0 

ft 

<9 

ft 

e 

ft 

F. 

F. 

F. 

F. 

-20° 

0.00008 

10° 

0.00104 

36° 

0.00267 

62° 

0.00724 

-16 

.00020 

12 

.OOIII 

38 

.00293 

64 

.00762 

—  12 

.00032 

14 

.00118 

40 

.00322 

66 

.00801 

-  8 

.00044 

16 

.00126 

42 

.00353 

68 

.00839 

18 

.00134 

44 

.00386 

70 

.00877 

—  6 

O.OOO5O 

20 

.00143 

46 

.00421 

72 

.00914 

-  4 

.00056 

22 

.00153 

48 

.00458 

—  2 

.00062 

24 

.00163 

50 

.00496 

76 

0.00990 

o 

.00068 

26 

.00174 

52 

•00534 

80 

.01065 

+  2 

.00075 

28 

.00187 

54 

.00572 

84 

.01141 

4 

.00082 

30 

.00203 

56 

.00610 

88 

.01217 

6 

.00089 

32 

.00222 

58 

.00648 

92 

.01293 

8 

0.00096 

34 

0.0243 

60 

.00686 

96 

.01369 

XXIV  INTRODUCTION. 

For  Centigrade  temperatures, 


0 

ft 

e 

£ 

0 

8 

c. 

c. 

c. 

-18° 
-16 

O.OOOJ 
.0008 

0° 

+  2 

O.OO22 
.0026 

1  8° 

20 

0.0077 
.0084 

-14 

.0009 

4 

.0031 

22 

.0091 

—  12 

.0010  + 

6 

.0037 

24 

.0097  + 

—  IO 

.0012 

8 

.0043 

26 

.0104 

—  8 

.0013 

10 

.0050 

28 

.0111 

-  6 

.0015 

12 

.0056 

3° 

.0118 

-  4 

.0017 

14 

.0063 

32 

.0125 

—  2 

.OOI9 

16 

.OO7O 

34 

.0132 

36 

.0139 

The  practical  tables  consist  essentially  of  two  mutually  dependent 
parts :  —  the  first  gives  values  of  2000  m  in  a  table  of  double  entry  of 
which  the  altitude  of  the  station  and  the  mean  temperature  of  the  air 
between  the  station  and  sea  level  are  the  arguments ;  the  second  gives  the 
reduction  to  sea  level  in  a  table  of  double  entry  of  which  the  arguments 
are  2000  m  and  the  observed  barometric  height  corrected  for  temperature. 
In  addition,  a  subsidiary  table  gives  the  small  correction  for  latitude  to 
be  applied  to  the  values  of  2000  m.  This  correction,  while  of  theoretical 
interest,  seldom  becomes  of  practical  importance,  since  its  effect  is  in 
general  overshadowed  by  the  relatively  large  uncertainties  incident  to  the 
determination  of  the  true  mean  temperature. 

The  mean  temperature  of  the  air  column  is  to  be  obtained  from  the 
observed  temperature  at  the  station  by  employing  some  assumption  as  to 
the  rate  of  change  of  temperature  with  altitude.  In  the  discussion  of 
barometric  observations  made  in  the  mountain  and  plateau  regions  of  the 
United  States,  it  has  been  found  that  this  rate  of  change  is  a  climatic  factor 
which  needs  to  be  determined  for  every  station  for  different  seasons  of  the 
year,  and  for  different  atmospheric  conditions.  When  the  results  of  such 
investigations  are  embodied  in  tables  for  reduction  to  sea  level,  the  tables  and 
the  method  of  their  use  may  be  simplified  and  the  labor  of  obtaining  the 
reduction  greatly  abridged ;  but  in  the  nature  of  the  case,  these  special 
methods  can  not  be  utilized  in  the  construction  of  general  tables  which 
are  to  be  applicable  to  all  phases  of  topography  and  climate. 

Whatever  method  be  used  for  obtaining  the  mean  temperature  of  the 
air  column  (0)  from  the  observed  temperature  at  the  station,  the  former 
and  hence  the  latter  is  subject  to  the  important  condition  that  it  shall  not 
contain  the  diurnal  fluctuation.  Hence  in  reducing  to  sea  level  any  indi- 
vidual observation  of  the  barometer,  the  simultaneous  observation  of  air 
temperature  used  in  obtaining  0  should  be  reduced  to  the  daily  mean  by 
a  correction,  or,  better,  the  actual  mean  temperature  of  the  preceding  twenty- 
four  hours  should  be  taken. 

In  the  report  on  Barometry  by  Prof.  F.  H.  Bigelow,  published  as 
volume  II  of  the  Report  of  the  Chief  of  the  Weather  Bureau,  1900—1901, 
an  elaborate  discussion  of  the  hypsometric  formulae  and  other  equations 
is  given.  The  special  features  of  the  report  are  (i)  New  Barometric 


BAROMETRICAL,    TABLES.  XXV 

Reduction  Tables  for  reductions  between  any  two  planes  within  the  eleva- 
tions from  sea  level  to  10,000  feet ;  (2)  the  reexamination  of  the  elevations 
of  Weather  Bureau  Stations  and  a  computation  of  corrections  ;  (3)  the  con- 
struction of  temperature  gradients  in  latitude,  longitude,  and  altitude  for  all 
stations  in  the  United  States  ;  (4)  the  computation  of  the  relative  humidity 
at  sea  level  and  the  vapor  tension  on  the  sea  level,  the  3, 500- foot  and  the 
ic,ooo-foot  planes;  (5)  the  computation  of  the  normal  station  pressures ; 
(6)  the  construction  of  charts  of  pressure,  temperature,  and  vapor  tension 
for  each  month  and  the  }7ear  on  the  three  planes  referred  to,  and  an  exten- 
sive series  of  tables  for  practical  reduction  of  observed  readings. 

TABLES  14,  15,  16. 

TABLES   14,  15,  16.      Reduction    of   the    barometer   to    sea    level  —  English 

measures. 

Table  14  gives  values  of  2000  x  m. 


m  =  — 


56573  -i-  123.1  0  +  0.003  Z 

The  temperature  0  varies  by  intervals  of  2°  from  —  20°  F.  to  96°  F. , 
except  near  the  extremities  of  the  table  where  the  interval  is  4!  The  alti- 
tude Z  varies  by  intervals  of  100  feet  from  100  to  9000  feet.  The  values 
of  200002  are  given  to  one  decimal. 

In  order  to  facilitate  interpolations  for  ^actions  of  a  100  feet  in 
altitude,  the  tabular  differences  for  100  feet  have  been  added  on  each  line. 

Table  1 5  gives  a  small  correction  to  2000  m  for  latitude,  computed 
from  the  expression 

2000  m  x  0.002662  cos  2  <£. 

The  arguments  are  200002,  which  varies  by  tens  from  10  to  350,  and 
the  latitude,  which  varies  by  5°  from  o°  to  90.°  The  correction  is  to  be 
subtracted  for  latitudes  below  45°  and  added  for  latitudes  above  45.°  The 
tabular  values  are  given  to  one  decimal. 

Table  16,  with  the  value  of  2000  02  thus  corrected,  gives  the  correction 
which  must  be  applied  to  the  barometric  reading  B  (corrected  for  tem- 
perature) to  reduce  it  to  sea  level.  The  arguments  are  B>  which  varies  by 
0.5  inch  from  31.00  inches  to  19.5  inches,  and  values  of  200002,  which  are 
given  for  every  unit  from  i  to  334. 

The  reduction  values  B0  —  B  are  given  to  o.oi  inch. 

Example  : 

Let  B  =  26.24  inches  be  the  barometric  reading  (corrected  for  temper- 
ature) observed  at  a  station  whose  altitude  is  3572  feet,  and  latitude 
32.°  Suppose  the  mean  temperature  of  the  air  column  0  =  63^)  F. 

Table  14  gives  (p.  63)  with  Z=  3,500  feec  and  0  =  62.°8  F.,  2000 02  =  108.0 
The  difference  for  72  feet  is  2.2 

The  approximate  value  of  200002  is  110.2 


XXVI  INTRODUCTION. 

Table  15,  with  2000  m  —  no  and  latitude  =  32°,  gives  the  subtractive 
correction  o.i.  Hence  the  corrected  value  of  2000  m  is  no.i. 

With  2000^  =  110.1  and  #=26.24,  Table  16  (p.  72)  gives  the  reduc- 
tion to  sea  level,  3.55  inches.  Accordingly  the  barometric  pressure  reduced 
to  sea  level  is 

B0  =  26.24  +  3-55  =  29.79  inches. 

TABLES  17,  18,  19.     Reduction  of  the  barometer  to  sea  level  —  Metric  measures. 

For  reducing  to  sea  level  readings  of  the  metric  barometer,  the  baro- 
metric formula  in  metric  measures  derived  on  page  xxii  is  treated  in  the 
same  manner  as  the  formula  in  Knglish  measures  just  described  in  detail, 
and  the  method  of  construction  of  the  tables  is  the  same. 

Table  17  gives  values  of  2ooom. 


— 

18444  +  67-53  d  +  0.003  X 

The  temperature  0  varies  by  intervals  of  2°  from  —  16°  C.  to  +  36°  C. 
except  near  the  extremities  of  the  table  where  the  interval  is  4°  The  alti- 
tude Z  varies  by  10  metres  from  10  to  3000  metres.  The  values  of  2000  m 
are  given  to  one  decimal. 

Table  18  gives  the  small  correction  to  2000  m  for  latitude.  The  argu- 
ments are  2000  m,  which  varies  by  tens  from  10  to  350,  and  the  latitude 
which  varies  by  5°  from  o°  to  90.°  The  correction  is  to  be  subtracted  for 
latitudes  below  45°  and  added  for  latitudes  above  45?  The  tabular  values 
are  given  to  one  decimal.  The  value  of  2000  m  thus  corrected  is  then  used 
in  entering  Table  19. 

Table  19  gives  the  correction  which  must  be  applied  to  the  barometric 
reading  B  (corrected  for  temperature)  to  reduce  it  to  sea  level.  The  argu- 
ments are  B,  which  varies  by  lomm.  from  790  mm.  to  480  mm.,  and  values 
of  2000  m  which  vary  by  units  from  i  to  345.  The  tabular  values  B9  —  B 
are  given  to  o.  i  mm. 

Example  : 

Let  B=  648.7mm.  be  the  barometric  reading  observed  and  corrected 
for  temperature  at  a  station  whose  altitude  is  1353  metres  and  latitude 
32.°  Suppose  the  mean  temperature  of  the  air  column  0=  14?  3  C. 

Table  17  gives  (p.  83)  for  0  =  14°  and  Z—  1353,      2000  m=  138.6 
The  proportional  part  for  0^3  is  .15 

Hence  the  approximate  value  of  2000  m  is  J  38.45 

Table  18,  with  2000  m=  138  and  latitude  32°,  gives  the  subtractive 
correction  0.15.  Hence  the  corrected  value  of  2000  m  is  138.3.  With  this 
value  and  B  =  649  mm.  as  arguments,  Table  19  gives  B0  —  B  =  112.0  mm. 

Accordingly  the  barometric  reading  reduced  to  sea  level  is 

.#.  =  648.7  +  1  1  2.0  =  760.7  mm. 


BAROMETRICAL    TABLES.  XXVll" 

THE    DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

TABLES   20,  21,  22,  23,  24.     English  Measures. 

The  barometric  formula  developed  in  the  preceding  section  (see  p.  xxi) 
is  arranged  in  the  following  form  for  determining  heights  by  the  barometer, 

Z=  A^log  B0  -  log  B)  |  (i  +  a  0) 

(i+fl 

+  k  cos  2<£)  (1+17) 


in  which  ^T(log  B0  —  log  B)  is  an  approximate  value  of  Z  and  the  factors 
in  the  brackets  are  correction  factors  depending  respectively  on  the  air 
temperature,  the  humidity,  the  variation  of  gravity  with  latitude,  the  varia- 
tion of  gravity  with  altitude  in  its  effect  on  the  weight  of  mercury  in  the 
barometer,  and  the  variation  of  gravity  with  altitude  in  its  effect  on  the 
weight  of  the  air.  With  the  constants  already  given,  the  formula  becomes 
in  English  measures : 


Z  (feet)  =  60368  (log  B0  —  log  B) 


[1+0.002039(0  —  32°)] 
(i+0) 

(l  +  0.002662  COS  2<£)  (l  +  0.00239) 


In  order  to  make  the  temperature  correction  as  small  as  possible  for 
average  air  temperatures,  50°  F.  will  be  taken  as  the  temperature  at  which 
the  correction  factor  is  zero.  This  is  accomplished  by  the  following  trans- 
formation : 

i  +  0.002039  (0  —  32°)  =  [i  +  0.002039  (0  —  50°)]  [i  +  0.0010195  x  36°]. 

The  second  factor  of  this  expresssion  combines  with  the  constant,  and 
gives  60368  (i  +0.0010195  x  36°)  —  62583.6. 

The  first  approximate  value  of  Z  is  therefore 

62583.6  (log  B0-  log  B). 

In  order  further  to  increase  the  utility  of  the  tables,  we  shall  make  a 
further  substitution  for  log  B0  —  log  B,  and  write 


62583.6  (log  B0  -  log  B)  =  62583.6  log  -  log 

Table   20  contains  values  of  the  expression 

62583.6  log  ^ 

for  values  of  B  varying  by  intervals  of  o.oi  inch  from  12.00  inches  to  30.90 
inches. 

The  first  approximate  value  of  Z  is  then  obtained  by  subtracting  the 


XXV111  INTRODUCTION. 

tabular  value  corresponding  to  B0  from  the  tabular  value  corresponding  to 
B  (B  and  B9  being  the  barometric  readings  observed  and  corrected  for 
temperature  at  the  upper  and  lower  stations  respectively). 

Table  21  gives  the  temperature  correction 

Zx  0.002039  (0 —  5^°). 

The  side  argument  is  the  mean  temperature  of  the  air  column  (0)  given 
for  intervals  of  i°  from  o°  to  100°  F.  The  top  argument  is  the  approximate 
difference  of  altitude  Z  obtained  from  Table  20. 

For  temperatures  above  50°  F. ,  the  correction  is  to  be  added,  and  for 
temperatures  below  50°  /*".,  the  correction  is  to  be  subtracted.  It  will  be 
observed  that  the  correction  is  a  linear  function  of  Z,  and  hence,  for  example, 
the  value  for  Z=  1740  is  the  sum  of  the  corrections  in  the  columns  headed 
1000,  700,  and  40. 

In  general,  accurate  altitudes  can  not  be  obtained  unless  the  temperature 
used  is  freed  from  diurnal  variation. 

Table  22  gives  the  correction  for  latitude,  and  for  the  variation  of  gravity 
with  altitude  in  its  effect  on  the  weight  of  the  mercury.  When  altitudes 
are  determined  with  aneroid  barometers  the  second  factor  does  not  enter  the 
formula.  In  this  case  the  effect  of  the  latitude  factor  can  be  obtained 
by  taking  the  difference  between  the  tabular  value  for  the  given  latitude  and 
the  tabular  value  for  latitude  45.°  The  side  argument  is  the  latitude  of  the 
station  given  for  intervals  of  2.°  The  top  argument  is  the  approximate 
difference  of  height  Z. 

Table  23  gives  the  correction  for  the  average  humidity  of  the  air  at 
different  temperatures;  the  values  of  the  factor  (i  -4- j8)  adopted  by  Prof. 
Ferrel  and  given  on  page  xxiii  have  been  used.  This  correction  could  have 
been  incorporated  with  the  temperature  factor  in  Table  21,  but  it  is  given 
separately  in  order  that  the  magnitude  of  the  correction  may  be  apparent, 
and  in  order  that,  when  the  actual  humidity  is  observed,  the  correction  may 
be  computed  if  desired,  by  the  expression 


Z  (0.378  I 


where  e  is  the  mean  pressure  of  vapor  in  the  air  column,  and  b  the  mean 
barometric  pressure. 

The  side  argument  is  the  mean  temperature  of  the  air  column,  varying 
by  intervals  of  2°  from  —  20°  F.  to  96°  F.,  except  near  the  extremities  of  the 
table  where  the  interval  is  4?  The  top  argument  is  the  approximate 
difference  of  altitude  Z. 

Table  24  gives  the  correction  for  the  variation  of  gravity  with  altitude 
in  its  effect  on  the  weight  of  the  air.  The  side  argument  is  the  approximate 
difference  of  altitude  Z,  and  the  top  argument  is  the  elevation  of  the  lower 
station  k0. 

The  corrections  given  by  Tables  22,  23  and  24%are  all  additive. 


BAROMETRICAL    TABLES.  Xxix 

Example  : 


the  barometric  pressure  observed,  and  corrected  for  temperature, 
at  the  upper  and  lower  stations  be,  respectively,  B  —  23.61  and 
B0  =  29.97.  Let  the  mean  temperature  of  the  air  column  be  35°  F.y 
and  the  latitude  44°  16'.  To  determine  the  difference  of  height. 

Feet. 

Table  20,  argument  23.61,  gives  6420 

Table  20,  29-97>     "  —      64 

Approximate  difference  of  height  (Z)  =  6484 

Table  21,  with  Z=  6484  and  0  =  35°  F.,  gives  —    198 

Table  22,  with  Z=  6300  and  <£  =  44°,  gives  -f      16 

Table  23,  with  Z=  6300  and  0  —  35.°  F.,  gives  -f      17 

Table  24,  with  Z=  6300  and  h0  =  o,  gives  -f        2 

Final  difference  of  height  (Z)  =  6321 

If  in  this  example  the  barometric  readings  be  observed  with  aneroid 
barometers,  the  correction  to  be  obtained  from  Table  22  will  be  simply  the 
portion  due  to  the  latitude  factor,  and  this  will  be  obtained  by  subtracting 
the  tabular  value  for  45°  from  that  for  44°,  the  top  argument  being  Z—  6300. 
This  gives  16  —  15  =  i. 

TABLES   25,  26,  27,  28,  29.     Metric  Measures. 

The  barometric  formula  developed  on  page  xxi  is,  in  metric  units, 


Z  (metres)  ==  18400  (log  B0  —  log  B) 


(i  +0.003670  C.} 

(i+o.378f-) 

(i  -f  0.00266 cos  2 <£)  (i  -r  0.00239) 


•f 


6  367  324 


The  approximate  value  of  Z  (the  difference  of  height  of  the  upper  and 
lower  station)  is  given  by  the  factor  18400  (log  B0  —  log  B).  This  expression 
is  computed  by  means  of  two  entries  of  a  table  whose  argument  is  the 
barometric  pressure.  In  order  that  the  two  entries  may  result  at  once  in  an 
approximate  value  of  the  elevation  of  the  upper  and  lower  stations,  a 
transformation  is  made,  which  gives  the  following  identity: 

18400  (log  B0  -  log  B)  =  18400  (log  ^  -  log  7-j?)  - 

TA^LE    25 

*7^O 

Table   25  gives  values  of  the  expression  18400  log^-~-  for  values  of  B 

varying  by  intervals  of  i  mm.  from  300  mm.  to  779  mm.  The  first  approxi- 
mate value  of  Zis  then  obtained  by  subtracting  the  tabular  value  correspondir  g 
to  B0  from  the  tabular  value  corresponding  to  B  (B  and  B0  being  the 
barometric  readings  observed  and  reduced  to  o°  C.  at  the  upper  and  lower 


XXX  INTRODUCTION. 

stations  respectively ~).  The  first  entry  of  Table  25  with  the  argument  B 
gives  an  approximate  ralue  of  the  elevation  of  the  upper  station  above 
sea  level,  and  the  second  entry  with  the  argument  B0  gives  an  approximate 
value  of  the  elevation  of  the  lower  station. 

Table   26  gives  the  temperature  correction  :  0.00367  0  C.  x  Z. 

The  side  argument  is  the  approximate  difference  of  elevation  Z  and  the 
top  argument  is  the  mean  temperature  of  the  air  column.  The  values  of  Z 
vary  by  intervals  of  100  m.  from  100  to  4000  metres  and  the  temperature 
varies  by  intervals  of  i°  from  i°  C.  to  10°  C.  with  additional  columns  for  20°, 
30°,  and  40°  C.  Attention  is  called  to  the  fact  that  the  formula  is  linear 
with  respect  to  0,  and  hence  that  the  correction,  for  example,  for  27°  equals 
the  correction  for  20°  plus  the  correction  for  7.°  When  the  table  is  used  for 
temperatures  below  o°  C.y  the  tabular  correction  must  be  subtracted  from, 
instead  of  added  to,  the  approximate  value  of  Z. 

Table  27  (pp.  112  and  113)  gives  the  correction  for  humidity  resulting 

& 

from  the  factor  0.378  7-  x  Z—$Z. 

Page  112  gives  the  value  of  0.378-  multiplied  by  10000.     The  side 

argument  is  the  mean  pressure  of  aqueous  vapor,  £,  which  serves  to  repre- 
sent the  mean  state  of  humidity  of  the  air  between  the  two  stations. 
*  =  i  (/+./0)  (/and/0  being  the  vapor  pressures  observed  at  the  two  stations) 
has  been  written  at  the  head  of  the  table,  but  the  value  to  be  assigned  to  e 
is  in  reality  left  to  the  observer,  independently  of  all  hypothesis.  The  top 
argument  is  the  mean  barometric  pressure  \  (B  +  B0). 

The  vapor  pressure  varies  by  millimetres  from  i  to  40,  and  the  mean 
barometric  pressure  varies  by  intervals  of  20 mm.  from  500  mm.  to  760  mm. 

The  tabular  values  represent  the  humidity  factor  ft  or  0.378-7,  multiplied  by 

IOOOO. 

Page  113  gives  the  correction  for  humidity,  with  Z  and  loooo  x  0.378  ~ 

(derived  from  page  112)  as  arguments. 

The  approximate  difference  of  altitude  is  given  by  intervals  of  100 
metres  from  100  to  4000  metres,  and  the  values  of  10000/3  vary  by  intervals 
of  25  from  25  to  300.  The  tabular  values  are  given  in  tenths  of  metres  to 
facilitate  and  increase  the  accuracy  of  interpolation. 

Table  28  gives  the  correction  for  latitude,  and  for  the  variation  of 
gravity  with  altitude  in  its  effect  on  the  weight  of  the  mercurial  column. 
When  altitudes  are  determined  with  aneroid  barometers,  the  latter  factor 
does  not  enter  the  formula.  In  this  case  the  effect  of  the  latitude  factor 
can  be  obtained  by  subtracting  the  tabular  value  for  latitude  45°  from  the 
tabular  value  for  the  latitude  in  question. 

The  side  argument  is  the  approximate  difference  of  elevation  Z,  varying 
by  intervals  of  100  metres  from  100  to  4000.  The  top  argument  is  the 
latitude  varying  by  intervals  of  5°  from  o°  to  75! 


BAROMETRICAL    TABLES.  XXXJ 

TABLE     29. 

Table  29  gives  the  correction  for  the  variation  of  gravity  with  altitude 
in  its  effect  on  the  weight  of  the  air. 

The  side  argument  is  the  same  as  in  Table  28  ;  the  top  argument  is 
the  height  of  the  lower  station  varying  by  intervals  of  200  metres  from  o  to 
2000,  with  additional  columns  for  2500,  3000  and  4000  metres. 
Example : 

Let  the  barometric  reading  (reduced  to  o°  C. )  at  the  upper  station 
be  655.7mm.;  at  the  lower  station,  772.4mm.  Let  the  mean 
temperature  of  the  air  column  be  0=12*3  C-,  the  mean  vapor 
pressure  e  =  9  mm.  and  the  latitude  <f>  =  32.° 

Table  25,  with  argument  655.7,  gives  1179  metres. 

Table  25,     "  "        772.4,      "  -    129 

Approximate  value  of  Z  =  1308 

Table  26,  with  Z=  1300  and  6  =  i2.°3  C,  gives  59 

Table  27,  with  e  =  gmm.  and  Z=  1370,  gives  7 

Table  28,  with  Z=  1370  and  #  =  32°,  gives  5 

Table  29,  with  Z=  1370  and  h0  =  o,  gives  o 


Corrected  value  of  Z  =  1379  metres. 

TABLE     3O. 

TABLE  30.     Difference  of  height  corresponding  to  a  change  of  Q.I    inch   in 
the  barometer  —  English   measures, 

If  we  differentiate  the  barometric  formula,  page  xxvii,  we  shall  obtain, 
neglecting  insensible  quantities, 

dZ-=  -  26281  ^gr  (x  +  0.002039  (0  -  32°))  (i  +  0)  • 

in  which  B  represents  the  mean  pressure  of  the  air  column  dZ. 
Putting  d  B  =  o.  i  inch, 


+0.002039(6-32°)) 


The  second  member,  taken  positively,  expresses  the  height  of  a  column 
of  air  in  feet  corresponding  to  a  tenth  of  'an  inch  in  the  barometer  on  the 
parallel  of  45°  latitude.  Since  the  last  factor  (i  +  /3),  as  given  on  page  xxiii, 
is  a  function  of  the  temperature,  the  function  has  only  two  variables  and 
admits  of  convenient  tabulation. 

Table  30,  containing  values  of  dZ  for  short  intervals  of  the  arguments 
B  and  0,  has  been  taken  from  the  Report  of  the  U.  S.  Coast  Survey,  1881, 
Appendix  10,  —Barometric  hypsometry  and  reduction  of  the  barometer  to  sea 
level,  by  Wm.  Ferrel.* 

*  Due  to  the  use  of  a  slightly  different  value  for  the  coefficient  of  expansion,  Prof. 
Ferrel'  s  formula,  upon  which  the  table  is  computed,  is 

dZ=- 


XXxii  f  INTRODUCTION. 

Th^  temperature  argument  is  given  for  every  5°  from  30°  F.  to  85°  F., 
and  the  pressure  argument  for  every  0.2  inch  from  22.0  to  30.8  inches. 

This  table  may  be  used  in  computing  small  differences  of  altitude,  and, 
up  to  a  thousand  feet  or  more,  very  approximate  results  may  be  obtained. 

Example  : 

Mear>  pressure  at  Augusta,  October,  1891,  29.94  ;  temperature,      6o.°8  F. 
Hear-  pressure  at  Atlanta,  October,  1891,  28.97  \  temperature,      59^4 
Mean  pressure  of  air  column,  B  =  29.455  5  0  —  60?  i 

Entering  the  table  with  29.455  and  6o.°i  as  arguments,  we  take  out  94. 95 
as  the  difference  of  elevation  corresponding  to  a  tenth  of  an  inch  difference 
of  pressure.  Multiplying  this  value  by  the  number  of  tenths  of  inches 
difference  in  the  observed  pressures,  viz.  97,  we  obtain  the  difference  of 
elevation  921  feet. 

TABLE  31.     Difference  of  height  corresponding  to  a  change  of  one  millimetre 
in  the  barometer — Metric  measures. 

This  table  has  been  computed  by  converting  Table  18  into  metric  units. 
The  temperature  argument  is  given  for  every  2°  from  —  2°  C.  to  -f  36°  C. ;  the 
pressure  argument  is  given  for  every  millimetre  from  760  to  560  mm. 

TABLE   32.     Babinefs  formula  for  determining  heights  by  the  barometer. 

Babinet's  formula  for  computing  differences  of  altitude*  represents  the 
formula  of  Laplace  quite  accurately  for  differences  of  altitude  up  to  1000 
metres,  and  within  one  per  cent  for  much  greater  altitudes.  As  it  has  been 
quite  widely  disseminated  among  travellers  and  engineers,  and  is  of  con- 
venient application,  the  formula  is  here  given  in  English  and  metric  measures. 
It  might  seem  desirable  to  alter  the  figures  given  by  Babinet  so  as  to  con- 
form to  the  newer  values  of  the  barometrical  constants  now  adopted  ;  but 
this  change  would  increase  the  resulting  altitudes  by  less  than  one-half  of 
one  per  cent  without  enhancing  their  reliability  to  a  corresponding  degree, 
on  account  of  the  outstanding  uncertainty  of  the  assumed  mean  temperature 
of  the  air. 

The  formula  is,  in  English  measures, 

r        /0+/-640n  B0—B 
Z  (feet)  i  52494  !_'  +        900       J  B^TB  ; 

and  in  metric  measures, 


in  which  Z  is  the  difference  of  elevation  between  a  lower  and  upper  station, 
at  which  the  barometric  pressures  corrected  for  all  sources  of  instrumental 
error  are  B0  and  B,  and  the  observed  air  temperatures  are  t0  and  /,  respectively. 

*  Comptes  Rendus,  Paris,  1850,  vol.  xxx.,  page  309. 


BAROMETRICAL    TABLES.  XXXlll 


For  ready  computation  the  formula  is  written 

B-B 


and  the  factor  C,  computed  both  in  English  and  metric  measures,  has  been 
kindly  furnished  by  Prof.  Cleveland  Abbe.  The  argument  is  -J  (/0  +  1) 
given  for  every  5°  Fahrenheit  between  10°  and  100°  F.y  and  for  every  2° 
Centigrade  between  10°  and  40°  Centigrade. 

In  using  the  table,  it  should  be  borne  in  mind  that  on  account  of  the 
uncertainty  in  the  assumed  temperature,  the  last  two  figures  in  the  value  of 
C  are  uncertain,  and  are  here  given  only  for  the  sake  of  convenience  of 
interpolation.  Consequently  one  should  not  attach  to  the  resulting  altitudes 
a  greater  degree  of  confidence  than  is  warranted  by  the  accuracy  of  the 
temperatures  and  the  formula.  The  table  shows  that  the  numerical  factor 
changes  by  about  one  per.  cent  of  its  value  for  every  change  of  five  degrees 
Fahrenheit  in  the  mean  temperature  of  the  stratum  of  air  between  the 
upper  and  lower  stations  ;  therefore  the  computed  difference  of  altitude  will 
have  an  uncertainty  of  one  per  cent  if  the  assumed  temperature  of  the  air 
is  in  doubt  by  5°  F.  With  these  precautions  the  observer  may  properly 
estimate  the  reliability  of  his  altitudes  whether  computed  by  Babinet's 
formula  or  by  more  elaborate  tables. 

Example  : 

Let  the  barometric  pressure  observed  and  corrected  for  temperature  at 
the  upper  and  lower  stations  be,  respectively,  B  —  635  mm.  and 
B0  —  730  mm.  Let  the  temperatures  be,  respectively,  t  =  15°  C, 
t0  =  20°  C.  To  find  the  approximate  difference  of  height. 

With  |  (70  +  0  =  -      ^-  =  iy°5  C.,  the  table  in  metric  measures  gives 

/?    —  /?  rvc 

C=  17120  metres.  —• 

BQ  +  B      1365 

The  approximate  difference  of  height  =  17120  x  ~-  =  1191.5  metres. 

THERMOMETRICAL  MEASUREMENT  OF  HEIGHTS  BY  OBSERVATION  OF  THE 
TEMPERATURE  OF  THE  BOILING  POINT  OF  WATER. 

When  water  is  heated  in  the  open  air,  the  elastic  force  of  its  vapor 
gradually  increases,  until  it  becomes  equal  to  the  incumbent  weight  of  the 
atmosphere.  Then,  the  pressure  of  the  atmosphere  being  overcome,  the 
steam  escapes  rapidly  in  large  bubbles  and  the  water  boils.  The  tem- 
perature at  which  water  boils  in  the  open  air  thus  depends  upon  the 
weight  of  the  atmospheric  column  above  it,  and  under  a  less  barometric 
pressure  the  water  will  boil  at  a  lower  temperature  than  under  a  greater 
pressure.  Now,  as  the  weight  of  the  atmosphere  decreases  with  the 
elevation,  it  is  obvious  that,  in  ascending  a  mountain,  the  higher  the 


XXXI V  INTRODUCTION. 

station  where  an  observation  is  made,  the  lower  will  be  the  temperature  of 
the  boiling  point. 

The  difference  of  elevation  between  two  places  therefore  can  be  deduced 
from  the  temperature  of  boiling  water  observed  at  each  station.  It  is 
only  necessary  to  find  the  barometric  pressures  which  correspond  to  those 
temperatures,  and,  the  atmospheric  pressures  at  both  places  being  known, 
to  compute  the  difference  of  height  by  the  tables  given  herein  for  com- 
puting heights  from  barometric  observations. 

From  the  above,  it  may  be  seen  that  the  heights  determined  by 
means  of  the  temperature  of  boiling  water  are  less  reliable  than  those 
deduced  from  barometric  observations.  Both  derive  the  difference  of  alti- 
tude from  the  difference  of  atmospheric  pressure.  But  the  temperature  of 
boiling  water  gives  only  indirectly  the  atmospheric  pressure,  which  is 
given  directly  by  the  barometer.  This  method  is  thus  liable  to  all  the 
chances  of  error  which  may  affect  the  measurements  by  means  of  the 
barometer,  besides  adding  to  them  new  ones  peculiar  to  itself,  the  prin- 
cipal of  which  is  the  difficulty  of  ascertaining  with  the  necessary  accuracy 
the  true  temperature  of  boiling  water.  In  the  present  state  of  ther- 
mometry  it  would  hardly  be  safe,  indeed,  to  rely,  in  the  most  favorable 
circumstances,  upon  quantities  so  small  as  hundredths  of  a  degree,  even 
when  the  thermometer  has  been  constructed  with  the  utmost  care ;  more- 
over, the  quality  of  the  glass  of  the  instrument,  the  form  and  substance 
of  the  vessel  containing  the  water,  the  purity  of  the  water  itself,  the  position 
at  which  the  bulb  of  the  thermometer  is  placed,  whether  in  the  current  of 
the  steam  or  in  the  water,  — =•  all  these  circumstances  cause  no  inconsiderable 
variations  to  take  place  in  the  indications  of  thermometers  observed  under 
the  same  atmospheric  pressure.  Owing  to  these  various  causes,  an  obser- 
vation of  the  boiling  point,  differing  by  one-tenth  of  a  degree  from  the  true 
temperature,  ought  to  be  still  admitted  as  a  good  one.  Now,  as  the  tables 
show,  an  error  of  one-tenth  of  a  degree  Centigrade  in  the  temperature  of 
boiling  water  would  cause  an  error  of  2  millimetres  in  the  barometric 
pressure,  or  of  from  70  to  80  feet  in  the  final  result,  while  with  a  good 
barometer  the  error  of  pressure  will  hardly  ever  exceed  one-tenth  of  a 
millimetre,  making  a  difference  of  3  feet  in  altitude. 

Notwithstanding  these  imperfections,  the  hypsometric  thermometer  is 
of  the  greatest  utility  to  travellers  and  explorers  in  rough  countries,  on 
account  of  its  being  more  conveniently  transported  and  much  less  liable 
to  accidents  than  the  mercurial  barometer.  A  suitable  form  for  it,  designed 
by  Regnault \Annales  de  Chimie  et  de  Physique,  Tome  xiv,  p.  202),  consists 
of  an  accurate  thermometer  with  long  degrees,  subdivided  into  tenths. 
For  observation  the  bulb  is  placed,  about  2  or  3  centimetres  above  the 
surface  of  the  water,  in  the  steam  arising  from  distilled  water  in  a  cylin- 
drical vessel,  the  water  being  made  to  boil  by  a  spirit-lamp. 


HYGROMETRICAI,    TABLES.  XXXV 

TABLES     33,    34. 

Barometric  pressures  corresponding  to  the  temperature  of  boiling  water. 

TABLE   33.  English  Measures. 

TABLE   3-4.  Metric  Measures. 

Table  33  is  a  conversion  into  English  measures  of  Table  34.  The 
argument  is  the  temperature  of  boiling  water  for  every  tenth  of  a  degree 
from  1 85^0  to  2i2.°9  Fahrenheit.  The  tabular  values  are  given  to  the 
nearest  o.oi  inch. 

Table  34  is  Broch's  table  of  barometric  pressures  corresponding  to  tem- 
peratures of  boiling  water.  This  table  is  the  same  as  in  the  International 
Meteorological  Tables  of  1890.  The  argument  is  given  for  every  tenth  of  a 
degree  from  8o°.o  to  ioo°.9  C.  on  Regnault's  normal  mercurial  ther- 
mometer. The  tabular  values  are  given  to  the  nearest  o.  i  mm. 


HYGROMETRICAL  TABLES. 

PRESSURE   OF  SATURATED   AQUEOUS   VAPOR. 

Tables  35,  36,  and  43,  giving  the  pressure  of  saturated  aqueous  vapor, 
are  based  upon  Dr.  Broch's  reduction  of  the  observations  of  Regnault 
(  Travaux  et  Memoires  du  Bureau  international  dcs  Poids  et  Mcsurcs,  t.  I, 
p.  A  19-39).  This  reduction  assumes  that  the  observations  may  be  repre- 
sented by  the  empirical  formula 

jr_  A  x  I0 


in  which  F  is  the  pressure  of  aqueous  vapor  expressed  in  millimetres  of 
pure  mercury,  at  o°  C.  and  under  the  standard  gravity  at  latitude 
45°  and  sea  level,  its  density  being  13  59593. 

t,  the  temperature  expressed  in  Centigrade  degrees  on  Regnault's 
normal  mercurial  thermometer. 

a-  —  0.003667458 

By  using  the  simultaneous  values  of  F  and  t  given  by  Regnault  'a 
observations,  Dr.  Broch  obtained  a  series  of  observation  equations  whose 
solution  by  the  method  of  least  squares  gave  the  following  values  for  the 
coefficients  : 

A=       4.5686859 

b=      io~2  x  3.134366  174 

c  =  —  iQ-5  xi.  416  1  12  423 

d=      io-7  x  1.935338308 

*  =  —  io-9  x  2.  646  535  103 

/=      io-"  x  1.13937?  158 
From  this  formula  .Broch's  tables  of  vapor  pressure  were  computed. 


XXXVI  INTRODUCTION. 

TABLE   35.     Pressure  of  aqueous  vapor — English  measures. 

This  table  is  a  conversion  into  English  measures  of  Table  36.  It  gives 
the  vapor  pressure  for  temperatures  varying  by  o.°2  from  —  20.  °o  to  2i4.°o 
Fahrenheit,  on  Regnault's  normal  mercurial  thermometer  scale. 

The  tabular  values  are  given  in  inches  to  four  decimals. 

A  column  of  differences  for  o°.  i  is  added  for  convenience  in  interpolating. 

TABLE  36.     Pressure  of  aqueous  vapor. — Metric  measures. 

This  table,  taken  from  Broch,  gives  the  pressure  of  aqueous  vapor  to 
hundredths  of  a  millimetre  of  mercury  under  standard  gravity  for  temper- 
atures by  Regnault's  normal  mercurial  thermometer  varying  by  o°.i  C.  from 
—  29°. o  to  100°. 9  Centigrade.     The  values  for  temperatures  between  oc  C. 
and  45°  C.  are  given  in  Tpble  43,  the  remainder  in  Table  36. 

TABLE  37.     Pressure  of  aqueous  vapor  over  ice. — (C.  F.  Marvin.) 

Broch's  vapor  pressures  at  temperatures  below  o°  C.  (32°  F.)  as  given  in 
Tables  35  and  36,  when  compared  with  the  actual  observed  values  of  Reg- 
nault  are  found  to  be  systematically  too  large.  This  discrepancy  signifies 
that  the  empirical  formula  adopted  by  Broch  fails  to  represent  accurately 
the  law  of  variation  of  vapor  pressure  for  temperatures  both  above  and 
below  the  freezing  point.  Moreover,  the  failure  in  the  application  of  the 
formula  might  be  inferred  from  the  laws  of  diffusion  following  from  the 
kinetic  theory  of  gases,  for  these  give  no  reason  to  suppose  that  the  function 
expressing  the  relation  between  vapor  pressure  and  temperature  is  continuous 
between  the  two  states  of  water  and  ice. 

Under  proper  conditions  water  can  be  cooled  far  below  o°  C.  (32°  F.} 
before  solidifying,  so  that  at  the  same  temperature  we  may  have  it  either 
in  the  liquid  or  the  solid  state,  and  experiments  confirm  the  theory  of 
diffusion  in  showing  that  the  pressure  of  the  vapor  is  different  according  as 
it  is  in  contact  with  its  liquid  or  its  solid  at  the  same  temperature.  The 
method  hitherto  employed  of  combining  vapor  pressures  above  and  below 
freezing,  and  attempting  to  represent  them  by  a  single  continuous  function, 
must  therefore  be  considered  as  radically  erroneous. 

Recognizing  the  systematic  errors  of  the  vapor  pressures  given  by 
Broch's  formula  for  temperature  below  freezing,  a  new  determination  by 
direct  experimental  investigation  was  carried  out  by  Prof.  C.  F.  Marvin, 
from  the  results  of  which  (Annual  Report  Chief  Signal  Officer,  1891  ;  Ap- 
pendix No.  ID,)  Table  37  is  reproduced.  The  interpolation  between  the 
observed  pressures  which  were  noted  at  intervals  of  about  5°  F.,  was  effected 
graphically  and  not  by  mathematical  formula.  The  vapor  pressures  were 
determined  for  vapor  in  contact  with  ice,  and  also  for  vapor  over  water 
cooled  below  32°  F.  The  former  pressures  are  always  lower  than  the  latter  ; 
at  melting  ice  both  values  agree.  Independent  determinations  by  Juhlin 
confirm  Marvin's  results,  and  these  therefore  replace  the  values  given  by 
Broch.  [See  Landolt  and  Bornstein,  Phys.  Chem.,  Tabellen,  Berlin,  1905.] 


HYGROMETRICAL    TABLES.  XXXvii 

The  arguments  of  the  tables  are  given  for  every  two-tenths  of  a  degree 
Fahrenheit  and  for  each  half  degree  centigrade.  The  temperatures  are  as 
measured  by  the  normal  air  thermometer. 

TABLES     38,     39. 

TABLE  38.      Weight  of  a  cubic  Joot  of  saturated  vapor  —  English  measures. 
TABLE  39.      Weight  of  a  cubic  metre  of  saturated  vapor  —  Metric  measures. 

The  weight  of  a  <.ubic  metre  of  saturated  vapor  is  given  by  the  expression 

^=_£i_    _F 

I  -f-  a  t     760 

a  is  the  weight  of  a  cubic  metre  of  dry  air  (free  from  carbonic  acid) 
at  temperature  o°  C,  and  pressure  of  760  millimetres  of  standard 
mercury  at  45°  latitude  and  sea-level:  a  —  1.29278  kg.  (Bureau 
International  des  Poids  et  Mesures  :  Travaux  et  Mtmoires,  t.  I,  p. 

A  54-) 

<5  is  the  density  of  aqueous  vapor  relative  to  dry  air  :  <S  =  0.6221. 
F  is  the  pressure  of  saturated  aqueous  vapor  at  temperature  t  ;    above 

freezing,  Broch's  values  are  adopted,  but  below  freezing  Marvin's  are 

preferred. 

«  is  the  coefficient  of  expansion  of  air  for  i°  C.  :  «  —  0.003670. 
/  is  the  temperature  in  Centigrade  degrees. 
Whence  we  have 

F 

W  (grammes)  =  1.05821  X  -  —  -  --  A. 

i  +  0.003670  / 

Table  39  is  computed  from  this  formula  and  gives  the  weight  of  satu- 
rated vapor  in  grammes  in  a  cubic  metre  for  dew-points  from  —  29°  to  40°  C.  , 
the  intervals  from  6°  to  40°  C.  being  o.°i  C.  The  tabular  values  are  given 
to  three  decimals. 

The  weight  W  of  a  cubic  foot  of  saturated  vapor  is  obtained  by  convert- 
ing the  foregoing  constants  into  English  measures. 

The  weight  of  a  cubic  foot  of  dry  air  at  temperature  32°  F.  and  at  a 
pressure  of  760  mm.  or  29.921  inches  is 


We  have  therefore, 

,,„  ...          a'  B  F' 

W  (grains)  =  -  x  -    —  j-^  --  ^ 
29.921        i+a!(f  —  32°) 

*••  F 

1  ' 


+  0.002039  (''-  32') 

The  temperature  /'  is  expressed  in  degrees  Fahrenheit;  the  vapor 
pressure  F'  ,  expressed  in  inches,  is  obtained  from  Table  35.  (Brock)  for 
temperatures  above  o°  C,  but  from  the  more  recent  Table  37  (Marvin)  for 
temperatures  below  freezing. 


XXXV111  INTRODUCTION. 

Table  38  gives  the  weight  of  saturated  aqueous  vapor  in  grains  per 
cubic  foot  for  dew  points  given  to  every  o.°5  from — 19. °5  to  115°  T7.,  the 
values  being  computed  to  the  thousandth  of  a  grain.  The  vapor  pressures 
are  taken  from  Table  36  for  temperatures  above  freezing  but  from  Table  37 
for  those  below  freezing. 

REDUCTION    OF    OBSERVATIONS    WITH    THE    PSYCHROMETER    AND 
DETERMINATION   OF  RELATIVE   HUMIDITY. 

The  psychrometric  formula  derived  by  Maxwell,  Stefan,  August, 
Regnault  and  others  is,  in  its  simplest  form. 

f=f,-A  B  (/-/,), 
itt  which  t  =  Air  temperature. 

/,  =  Temperature  of  the  wet-bulb  thermometer. 
f  =  Pressure  of  aqueous  vapor  in  the  air, 
fi  =  Vapor  pressure,  saturated,  at  temperature  tr 
B  =  Barometric  pressure. 

A  =  A  quantity  which,  for  the  same  instrument  and  for  certain 
conditions,  is  a  constant,  or  a  function  depending  in  a 
small  measure  on  /, . 

All  pressures  are  expressed  in  inches  of  mercurial  column  under 
standard  gravity. 

The  important  advance  made  since  the  time  of  Regnault  consists  in 
recognizing  that  the  value  of  A  differs  materially  accoiding  to  whether  the 
wet-bulb  is  in  quiet  or  moving  air.  This  was  experimentally  demonstrated 
by  the  distinguished  Italian  physicist,  Belli,  in  1830,  and  was  well  known 
to  Kspy,  who  always  used  a  whirled  psychrometer.  The  latter  describes 
his  practice  as  follows :  ' '  When  experimenting  to  ascertain  the  dew-point 
by  means  of  the  wet-bulb,  I  always  swung  both  thermometers  moderately 
in  the  air,  having  first  ascertained  that  a  moderate  movement  produced 
the  same  depression  as  a  rapid  one." 

The  principles  and  methods  of  these  two  pioneers  in  accurate  psychrom- 
etry  have  now  come  to  be  adopted  in  the  standard  practice  of  meteor- 
ologists, and  psychrometric  tables  are  adapted  to  the  use  of  a  whirled  or 
ventilated  instrument. 

The  factor  A  depends  in  theory  upon  the  size  and  shape  of  the  ther- 
mometer bulb,  largeness  of  stem  and  velocity  of  ventilation,  and  different 
formulae  and  tables  would  accordingly  be  required  for  different  instruments. 
But  by  using  a  ventilating  velocity  of  three  metres  or  more  per  second,  the 
differences  in  the  results  given  by  different  instruments  vanish,  and  the  same 
tables  can  be  adapted  to  any  kind  of  a  thermometer  and  to  all  changes  of 
velocity  above  that  which  gives  sensibly  the  greatest  depression  of  the  wet- 
bulb  temperature;  and  with  this  arrangement  there  is  no  necessity  to 
measure  or  estimate  the  velocity  in  each  case  further  than  to  be  certain  that 
it  does  not  fall  below  the  assigned  limit. 


HYGROMETRICAIv    TABLES.  XXXIX 

The  formula  and  tables  here  given  for  obtaining  the  vapor  pressure  and 
dew-point  from  observations  of  the  whirled  or  ventilated  psychrometer  are 
those  deduced  by  Prof.  Wm.  Ferrel  {Annual  Report  Chief  Signal  Officer^ 
1886,  Appendix  24)  from  a  discussion  of  a  large  number  of  observations. 

Taking  the  psychrometric  formula  in  metric  units,  pressures  being 
expressed  in  millimetres  and  temperatures  in  Centigrade  degrees,  Prof. 
Ferrel  derived  for  A  the  value 

A  =  0.000656  (i  -1-  0.0019  /J 

In  this  expression  for  A,  the  factor  depending  on  ^  arises  from  a  similar 
term  in  the  expression  for  the  latent  heat  of  water,  and  the  theoretical  value 
of  the  coefficient  of  /,  is  0.00115.  Since  it  would  require  a  very  small 
change  in  the  method  of  observing  to  cause  the  difference  between  the 
theoretical  value  and  that  obtained  from  the  experiments,  Prof.  Ferrel 
adopted  the  theoretical  coefficient  0.00115  an<i  then  recomputed  the  obser- 
vations, obtaining  therefrori  the  final  value 

A  =  0.000660  (i  +  o.ooi  15^). 

With  this  value  the  psychrometric  formula  in  metric  measures  becomes 
/=/,  —  0.000660  B  (t  —  4)  (i  +  o.ooi  15  /,) 

In  order  to  adapt  the  formula  to  convenient  tabulation,  Prof.  Ferrel 
substituted  t  —  ti  for  /t  in  the  last  factor,  a  modification  which  produces 
appreciable  error  only  in  extreme  cases.  The  error  in  the  computed  vapor 
pressure  will  be 

-E  =  0.00000076  jff(*  —  O  (/— 24)- 

Expressed  in  English  measures,  the  formula  is 

/-/i-  0.000367  B  (*-  O  [i  +  0.00064  (/,-  32°)] 

and  with  the  same  modification  in  order,  to  render  the  formula  more  con- 
venient for  tabulation,  we  have 

/=/  —  0.000367  #  (7-  4)  (i  +  0.00064  (*  —  /,)), 
in  which/ =  Vapor  pressure  in  inches. 

fl=  Pressure  of  saturated  aqueous  vapor. 
t  -  Temperature  of  the  air  in  Fahrenheit  degrees. 
A  —  Temperature  of  the  wet-bulb  thermometer  in  Fahrenheit  degrees. 
B  —  Barometric  pressure  in  inches. 

TABLES  40,  41. 

Reduction  of  Psychrometric  Observations — English  measures. 
TABLE  4O.     Pressure  of  aqueous  vapor. 
TABLE  41.      Values  of  0.000367  B(t—t,}(i  +  t~t^ 

These  two  tables  provide  for  computing  the  vapor  pressure  and  dew- 
point  from  observations  of  ventilated  wet-  and  dry-bulb  Fahrenheit  ther- 
mometers. 


Xl  INTRODUCTION. 

Table  4O,  with  the  wet-bulb  temperature  ^  as  an  argument,  gives  the 
value  of  / ,  the  first  term  of  the  formula  for  the  vapor  pressure  f,  given 
above.  It  is  simply  an  abbreviation  of  Table  35  for  temperatures  above 
32°  F.,  and  of  Table  37  for  temperatures  below  32°  F.y  reprinted  for 
convenience. 

Table  41,  with  t—  /,  and  B  as  arguments,  gives  the  value  of  the  second 
term  of  the  formula,  viz  : 

o.ooo &TB(t-  A 

The  top  argument  is  given  for  every  half  inch  from  30.5  to  18.5  inches; 
the  side  argument,  t—  /,,  is  given  for  every  whole  degree  up  to  40°  F. 
Tabular  values  are  given  to  thousandths  of  inches. 

With  the  two  tables  we  then  have, 

f  (vapor  pressure)  =  Table  40  —  Table  41 . 

The  value  of  /  in  Table  40,  corresponding  to  the  vapor  pressure  thus 
obtained,  is  the  dew-point. 

Examples  : 

1.  Given  t  =  $4° 3;  {,  =  66*7,  and  .#  =  30.00  inches,  to  find  the  vapor 

pressure  and  dew-point. 

Table  40,  with  /,  =  66.°7,  gives  /  =  0.654  inches. 
Table  41,  with   t  —  t,  =  84.°3  —  66.°y  =  ij°6   and  B  =  30.00  inches 

as  arguments,   gives  0.196  inch   as  the  value   of   the  last  term 

of   the  expression   above.     Hence  we   have  the   vapor  pressure 
/=  0.654  —  0.396  =  0.458  inch.      The    temperature    (Table    40) 

corresponding  to  this  value  of/  is  the  dew-point,  d  =  56^6  F. 

2.  Given  £  =  $£5;    /,  =  29^4,  and  #-=-22.3  inches,  to  find  the  vapor 

pressure  and  dew-point. 

Table  40,  with  /,  =  29.°4,  gives /t  =  0.162  inch. 

Table  41,  with  t  —  t,  —  34.°5  —  29?4  =  5? i  and  #  =  22.5  inches  (the 
nearest  value  in  the  table  to  22.3  inches)  as  arguments,  gives  0.042 
inch  as  the  value  of  the  second  term  of  the  expression  for/.  Hence 
we  have  the  vat>or  pressure/  =  o.  162  —  0.042  —  o.  120  inch. 

The  temperature  ;oi  Table  40,  corresponding  to  this  value  of/  is  the 
dew-point,  d—  22.°o. 

NOTE — In  using  TabH  40,  the  proportional  part  for  tenths  of  the  argument,  t  —  /,, 
may  be  easily  obtained  by  taking  one-tenth  of  the  tabular  value  belonging  to  the  same 
number  of  degrees  ;  for  instance,  in  the  first  example,  the  tabular  value  for  17°  is  0.189, 
and  the  proportional  part  for  o?6  is  one-tenth  the  tabular  value  for  6?o,  viz.,  one-tenth 
of  .066,  or  .007.  Hence  we  get  o.  189  -f-  0.007  =  °- 196. 

TABLE  42.     Relative  humidity — Temperature  Fahrenheit. 

Table  42  gives  the  relative  humidity  of  the  air  in  hundredths,  having 
given  the  air  temperature  t  and  the  dew-point  d  in  Fahrenheit  degrees. 


HYGROMETRICAI,    TABLES,  xli 

It  is  computed  by  the  formula 

Relative  humidity  =  4=. 
Jr 

f  and  F  are  the  maximum  pressures  of  vapor  corresponding  respectively  to 
the  temperatures  d  and  t  as  given  in  Table  35  for  temperatures  above  32°  F. 
and  in  Table  37  for  temperatures  below  32°  F. 

The  top  argument  is  t  —  d,  extending  by  half  degree  intervals  from  o"  to 
15°  F.,  and  by  increasing  intervals  from  15°  to  75°  F. 

The  side  argument  is  the  air  temperature  /,  given  for  intervals  of  four 
degrees  from  —32°  to  120°  F. 

Example : 

Let  the  air  temperature  be  62 °  F.  and  the  dew-point  51° F.,  to  find  the 
relative  humidity. 

With  t  —  d  —  1 1°  for  the  top  argument,  and  t  =  62°  for  the  side  argument, 
the  table  gives  67.5  per  cent  as  the  relative  humidity. 

TABLES     43,     44. 

Reduction  of  Psychrometric  Observations — Metric  measures. 
TABLE  43.     Pressure  of  aqueous  vapor. 

TABLE  44.      Values  of  0.000660  #(/  —  /,)  (  i  +  — — !)  • 

\         073  / 

These  two  tables  provide  for  computing  the  vapor  pressure  and  dew- 
point  from  observations  of  ventilated  wet  and  dry-bulb  thermometers 
Centigrade. 

Table  43,  with  the  wet-bulb  temperature  /,  as  an  argument,  gives  the 
value  of/,,  the  first  term  of  the  formula  for  the  vapor  pressure/,  viz  : 

/=/  -0.000660  B  (/-/,)  [i  +  0.00115  (t-  /,)]  • 

It  gives  the  vapor  pressure  to  hundredths  of  a  millimetre  from — 30.  °o  C. 
to  45.  °9  C.  ;  the  intervals  are  i°  for  temperatures  below  o°  C.  and  o.°i  for 
temperatures  above  o°  C.  The  figures  agree  with  Tables  37  and  36, 
respectively. 

Table  44,  with  the  depression  of  the  wet-bulb  /  —  /,,  and  the  barometric 
pressure  B  as  arguments,  gives  the  value  of  the  second  term  of  the  formula. 

The  top  argument  is  given  for  every  10  millimetres  from  770  to  460  mm. ; 
the  side  argument  t  —  t^  is  given  for  every  whole  degree  up  to  20.  Tabular 
values  are  given  to  hundredths  of  a  millimetre. 

From  the  two  parts  of  the  table  we  then  have 

Vapor  pressure,  /  (mm)  =  Table  43  —  Table  44. 

The  temperature  in  Table  43,  corresponding  to  the  vapor  pressure  thus 
obtained,  is  the  dew-point. 


xlii  INTRODUCTION. 

Example  : 

Given  /=  io.°4  C. ;  £,  =  8^3  C.  and  B  —  740  mm. ,  to  find  the  vapor  pressure 
and  dew-point. 

Table  43,  with  the  argument  /,  =  8.°3  C.,  gives/  =8.15  mm. 

Table  44,  with  t  —  t,=2°.i  and  B  =  740  as  arguments,  gives  1.03 mm.  as 
the  value  of  the  last  term  of  the  expression  for/.  Hence  we  have  the  vapor 
pressure,  /=  8. 15  —  1.03  =  7. 12  mm.  The  value  of  the  temperature  in  Table 
40,  corresponding  to  this  vapor  pressure,  is  the  dew-point  d  —  6°^  C. 

TABLE  45.     Relative  humidity  —  Temperature  Centigrade. 

Table  45  gives  the  relative  humidity  of  the  air  in  hundredths,  having 
given  the  air  temperature  t  and  the  dew-point  d  in  Centigrade  degrees. 
It  is  computed  by  the  formula 

Relative  humidity  =  ™,  , 

F 

/"and  F  being  the  maximum  pressures  of  aqueous  vapor  corresponding  to 
the  temperatures  d  and  t  as  given  in  Tables  36  and  43. 

The  top  argument  is  the  dew-point  d,  extending  by  5°  intervals  from 
-15°  to  30°  C. 

The  side  argument  is  the  depression  of  the  dew-point  t  —  d,  given  for 
every  o.°2  C.  from  o°o  to  io.°o  ;  for  every  0^5  from  io!o  to  2O°o,  and  for  every 
i°  from  2o.°o  to  30 °o. 

Example  : 

Given  the  air  temperature  21°  C.  and  the  dew-point  17°  C,  to  determine 
the  relative  humidity. 

With  /—  d=  4°  C.  for  the  side  argument,  and  d  =  17°  C.  for  the  top 
argument,  the  table  gives  78  per  cent  as  the  relative  humidity. 

Prof.  F.  H.  Bigelow  in  the  Report  of  the  Chief  of  the  Weather  Bureau, 
1900-1901,  page  56,  expresses  the  following  views  concerning  the  use  of 
humidity  tables  : 

' '  The  arguments  for  entering  the  relative  humidity  tables,  as  used  by 
different  authors,  are  as  follows  : 

Tables.  Arguments  in  English  system.          Argument  in  metric  system. 

Smithsonian.  /  (/  —  d)  Table  42.  d  (t — d)  Table  45. 

International.  d  (t — d)  Table  x,  p.  270.      d  (t  —  d)  Table  ix,  p.  268. 

Hazen.  t  (/  —  /,)  Table  xii,  p.  64.      t  (t  —  t^  Table  xxiii,  p.  71. 

Weather  Bureau,      t  (t — /J  Table  ii,  p.  105, 

1896  ;   1900. 

Ferrel.  t  (t—d)  Table  iii,  p.  255, 

1886. 

From  this  table  it  is  seen  that  three  sets  of  arguments  are  employed, 
t(t—d),t  (t—  O ,  and  d(t—d}.  The  most  direct  set  is  doubtless  /  (t  —  O , 
as  these  are  related  to  the  original  observations  without  intermediate  reduc- 
tions. It  is  important  that  all  humidity  and  dew-point  tables  should  be 
constructed  for  the  same  argument,  in  order  to  avoid  the  confusion  attendant 


WIND    TABLES.  Xliil 

upon  comparative  studies  of  meteorological  data.  It  is  my  belief  that  an 
improvement  will  be  introduced  into  meteorology  by  the  use  of  the  ratio 

-g  instead  of  dew-point  or  relative  humidity." 

REDUCTION   OF  SNOWFALL   MEASUREMENT. 

The  determination  of  the  water  equivalent  of  snowfall  has  usually  been 
made  by  one  of  two  methods :  (a)  by  dividing  the  depth  of  snow  by  an 
arbitrary  factor  ranging  from  8  to  16  for  snow  of  different  degrees  of  com- 
pactness ;  (ft)  by  melting  the  snow  and  measuring  the  depth  of  the 
resulting  water.  The  first  of  these  methods  has  always  been  recognized  as 
incapable  of  giving  reliable  results,  and  the  second,  although  much  more 
accurate,  is  still  open  to  objection.  After  extended  experience  in  the 
trial  of  both  these  methods,  it  has  been  found  that  the  most  accurate  and 
most  convenient  measurement  is  that  of  weighing  the  collected  snow, 
and  then  converting  the  weight  into  depth  in  inches.  The  method  is 
equally  applicable  whether  the  snow  as  it  falls  is  caught  in  the  gage,  or  a 
section  or  the  fallen  snow  is  taken  by  collecting  it  in  an  inverted  gage. 

TABLE     46. 

TABLE  46.     Depth  of  water  corresponding  to  the  weight  of  snow  (or  rain) 
collected  in  an  8-inch  gage. 

The  table  gives  the  depth  to  hundredths  of  an  inch,  corresponding  to 
the  weight  of  snow  or  rain  collected  in  a  gage  having  a  circular  collecting 
mouth  8  inches  in  diameter  —  this  being  the  standard  size  of  gage  used 
throughout  the  United  States. 

The  argument   is  given   in  avoirdupois   pounds,  ounces  and   quarter 
ounces  in  order  that  it  shall  be  adapted  to  the  customary  graduation  of 
commercial  scales. 
Example : 

The  weight  of  snow  collected  in  an  8-inch  gage  is  2  Ibs.  2j^  oz.     To 
find  the  corresponding  depth  of  water. 

The  table  gives  directly  1.18  inches. 

TABLE     47. 

TABLE  47.     Rate  of  decrease  of  vapor  pressure  with  altitude. 

From  hygrometric  observations  made  at  various  mountain  stations  on 
the  Himalayas,  Mount  Ararat,  Teneriffe,  the  Alps,  and  also  in  balloon 
ascensions,  Dr.  J.  Hann  (Zeitschriftfur Meteorologie,  vol.  ix,  1874,  p.  193-200) 
Has  deduced  the  following  empirical  formula  showing  the  average  relation 
between  the  vapor  pressure  f0  at  a  lower  station  and/ the  vapor  pressure  at 
an  altitude  h  metres  above  it : 

/  -— 

"*ry>  —  10  6517- 

Jo 

This  is  of  course  an  average  relation  for  all  times  and  places  from  which 
the  actual  rate  of  decrease  of  vapor  pressure  in  any  individual  case  may 
widely  differ. 

Table  47  gives  the  values  of  the  ratio  -=£-  for  values  of  h  from  200  to 

/o 

6000  metres.     An  additional  column  gives  the  equivalent  values  of  h  in  feet. 


xliv  INTRODUCTION. 

WIND    TABLES. 

CALCULATION    OF    THE    MEAN   DIRECTION    OF    THE    WIND    BY     LAMBERT'S 

FORMULA. 

Lambert's  formula  for  the  eight  principal  points  of  the  compass  is 

_E  —  W+  (NE+SE—NW—SW}  cos  45° 
N—S+(NE  +  NW—  SE  —  S  W)  cos  45°  ' 

a  is  the  angle  of  the  resultant  wind  direction  with  the  meridian. 

E,  NE,  N,  etc. ,  represent  the  wind  movement  from  the  corresponding 
directions  East,  Northeast,  North,  etc.  In  practice  instead  of  taking  the  total 
wind  movement,  it  is  often  considered  sufficient  to  take  as  proprrtional 
thereto  the  number  of  times  the  wind  has  blown  from  each  direction,  which 
is  equivalent  to  considering  the  wind  to  have  the  same  mean  velocity  for  all 
directions. 

If  directions  are  observed  to  sixteen  points,  half  the  number  belonging 
to  each  extra  point,  should  be  added  to  the  two  octant  points  between 
which  it  lies  ;  for  example,  NNE  =  6  should  be  separated  into  N—  3  and 
NE  —  3  ;  ESE  =  4  into  E  =  2  and  SE  =  2 .  The  result  will  be  approximately 
identical  with  that  obtained  by  using  the  complete  formula  for  sixteen  points. 
TABLE  48.  Multiples  of  cos  45°  ;  form  for  computing  the  numerator  and 
denominator. 

TABLE   49.      Values  of  the  mean  direction  (a)  or  its  complement  (90°  —  a). 

Table  48  gives  products  of  cos  45°  by  numbers  up  to  209,  together  with 
a  form  for  the  computation  of  the  numerator  and  denominator,  illustrated 
by  fin  example.  The  quadrant  in  which  a  lies  is  determined  by  the  follow- 
ing rule  : 

When  the  numerator  and  denominator  are  positive,  a  lies  between 
AT  and  E. 

When  the  numerator  is  positive  and  the  denominator  negative,  a  lies 
between  5  and  E. 

When  the  numerator  and  denominator  are  negative,  a  lies  between 
5  and  W. 

When  the  numerator  is  negative  and  the  denominator  positive,  a  lies 
between  N  and  W. 

Table  49  *  combines  the  use  of  a  division  table  and  a  table  of  natural 
tangents.  It  enables  the  computer,  with  the  numerator  and  denominator  of 
Lambert's  formula  (computed  from  Table  48)  as  arguments,  to  take  out 
directly  the  mean  wind  direction  a  or  its  complement. 

The  top  argument  consists  of  every  fifth  number  from  10  to  200. 

The  side  argument  is  given  for  every  unit  from  i  to  50  and  for  every  two 
units  from  50  to  150.  Tabular  values  are  given  to  the  nearest  whole  degree. 

Rule  for  using  the  table  : 

Enter  the  table  with  the  larger  number  (either  numerator  or  denomi- 
nator) as  the  top  argument. 

*  From  Hand-book  of  Meteorological  Tables.  By  H.  A,  Hazen.  Washington,  1888. 
A  corrected  copy  of  the  table  was  kindly  furnished  by  the  author. 


WIND    TABLES.  xv 

If  the  denominator  be  larger  than  the  numerator,  the  table  gives  a. 

If  the  denominator  be  smaller  than   the   numerator,  the  table   gives 

90°—  a. 
a  is  measured  from  the  meridian  in  the  quadrant  determined  by  the  rule 

given  with  Table  48. 

Example  :  —  4? 

tan  a  =  - 

-27 

Table  49  gives  90°  —  a  ==  32° 


NOTE.—  If  the  numerator  and  denominator  both  exceed  150  or  if  either  exceeds 
200,  the  fraction  must  be  divided  by  some  number  which  will  bring  them  within  the 
limits  of  the  table.  The  larger  the  values,  provided  they  are  within  these  limits,  the 

—  18 
easier  and  more  accurate  will  be  the  computation.     For  example,  let  tan  a  = 


14 

The  top  argument  is  not  given  for  18,  but  if  we  multiply  by  5  or  10  and  obtain  —  —  01 
-180 


the  table  gives,  without  interpolation,  90°  —  a  =  38°  and  a  =  N 52°  W. 
140 

CONVERSION   OF   VELOCITIES. 

TABLE     50. 

TABLE   50.  Synoptic  conversion  of  velocities. 

This  table*,  contained  on  a  single  page,  converts  miles  per  hour  into 
metres  per  second,  feet  per  second  and  kilometres  per  hour.  The  argu- 
ment, miles  per  hour,  is  given  for  every  half  unit  from  o  to  78.  Tabular 
values  are  given  to  one  decimal.  For  the  rapid  interconversion  of  velocities, 
when  extreme  precision  is  not  required,  this  table  has  proved  of  marked 
convenience  and  utility. 

TABLE     51. 

TABLE   51.     Conversion  of  miles  per  hour  into  feet  per  second. 

• 

The  argument  is  given  for  every  unit  up  to  149  and  the  tabular  values 
are  given  to  one  decimal. 

TABLE     52. 

TABLE   52.     Conversion  of  feet  per  second  into  miles  per  hour. 

The  argument  is  given  for  every  unit  up  to  199  and  the  tabular  values 
are  given  to  one  decimal. 

TABLE     53. 

TABLE   53.     Conversion  of  metres  per  second  into  miles  per  hour,  f 

The  argument  is  given  for  every  tenth  of  a  metre  per  second  up  to 
60  metres  per  second,  and  the  tabular  values  are  given  to  one  decimal. 

TABLE     54. 

TABLE   54.     Conversion  of  miles  per  hour  into  metres  per  second,  f 

The  argument  is  given  for  every  unit  up  to  149,  and  the  tabular  values 
are  given  to  two  decimals. 

*  From  Hand-book  of  Meteorological  Tables.     By  H.  A.  Hazen.     Washington,  1888. 
tFrom  International  Meteorological  Tables.     Paris,  1890. 


xlvi  INTRODUCTION. 

TABLE   55.     Conversion  of  metres  per  second  into  kilometres  per  hour. 

The  argument  is  given  for  every  tenth  of  a  metre  per  second  up  to  60 
metres  per  second,  and  the  tabular  values  are  given  to  one  decimal. 

TABLE   56.     Conversion  of  kilometres  per  hour  into  metres  per  second. 

The  argument  is  given  for  every  unit  up  to  200,  and  the  tabular  values 
are  given  to  two  decimals. 

TABLE  57.     Beaufort  scale  for  winds  at  sea. 

The  personal  observation  of  the  estimated  force  of  the  wind  on  an 
arbitrary  scale  is  a  method  that  belongs  to  the  simplest  meteorological 
records  and  is  widely  practiced.  Although  anemometers  are  used  at  meteor- 
ological observatories,  the  majority  of  observers  are.  still  dependent  upon 
estimates  based  largely  upon  their  own  judgment,  and  so  reliable  can  such 
estimates  be  made  that  for  many  purposes  they  abundantly  answer  the 
needs  of  meteorology  as  well  as  of  climatology. 

A  great  variety  of  such  arbitrary  scales  have  been  adopted  by  different 
observers,  but  the  one  that  has  come  into  the  most  general  use  and  received 
the  greatest  definiteness  of  application  is  the  duodecimal  scale  introduced 
into  the  British  navy  by  Admiral  Beaufort  about  1800. 

The  definitions  of  the  successive  grades  of  the  Beaufort  scale  were 
made  in  terms  of  the  effect  of  the  wind  on  the  sails  of  a  full-rigged  ship,  so 
that  navigators  of  all  nations  have  generally  acquired  a  very  uniform  and 
definite  idea  of  their  meaning  and  a  very  considerable  expertness  in  the  use 
of  the  scale.  The  table  gives  the  designations  of  the  12  grades  and  conver- 
sions of  the  scale  into  wind  velocities  as  deduced  in  1874  by  R.  H.  Scott. 

In  the  Quarterly  Journal  of  the  Royal  Meteorological  Society,  volume  xxx, 
No.  132,  October,  1904,  Prof.  A.  Lawrence  Rotch  has  described  an  instru- 
ment for  obtaining  the  true  direction  and  velocity  of  the  wind  at  sea  aboard 
a  moving  vessel.  If  a  line  A  ^represents  the  wind  due  to  the  motion  of  a 
steamer  in  an  opposite  direction,  and  A  C  the  direction  of  the  wind  relative 
to  the  vessel  as  shown  by  the  drift  of  its  smoke,  then,  by  measuring  the 
angle  DBA  that  the  true  wind  makes  with  the  vessel — which  is  easily  done 
by  watching  the  wave  crests  as  they  approach  it — we  obtain  the  third  side, 
B  C,  of  the  triangle.  This  represents,  in  direction  and  also  in  length,  on 
the  scale  used  in  setting  off  the  speed  of  the  ship,  the  true  direction  of  the 
wind  relative  to  the  vessel  and  also  its  true  velocity.  The  method  fails  when 
the  wind  direction  coincides  with  the  ship's  course  and  becomes  inaccurate 
when  the  angle  between  them  is  small. 


GEODETICAL   TABLES. 
TABLE  58.   Relative  acceleration  of  gravity  at  sea-level  at  different  latitudes. 

The  formula  adopted  for  the  variation  with  latitude  of  apparent  gravity 
at  sea-level  is  that  of  Prof.  Harkness  * 

*  WM.  HARKNESS  :  The  solar  parallax  and  its  related  constants     Washington,  1891. 


GEODETICAL   TABLES.  xlvii 

g$  =£46  (l  — O.OO2662  COS  2<£) 

in  which  g±  is  the  acceleration  of  the  gravity  at  latitude  <£,  and  g^  the 
acceleration  at  latitude  45.° 

The  table  gives  the  values  of  the  ratio  -^-  to  six  decimals  for  every  10' 

g<& 
of  latitude  from  the  equator  to  the  pole.     Table  104  gives  the  logarithms. 

LENGTH  OF  A  DEGREE  OF  THE  MERIDIAN  AND  OF  ANY  PARALLEL. 

The  dimensions  of  the  earth  used  in  computing  lengths  of  the  meridian 
and  of  parallels  of  latitude  are  those  of  Clarke's  spheroid  of  1866.*  This 
spheroid  undoubtedly  represents  very  closely  the  true  size  and  shape  of  the 
earth,  and  is  the  one  to  which  nearly  all  geodetic  work  in  the  United  States 
is  now  referred. 

The  values  of  the  constants  are  as  follows  : 

a,  semi-major  axis  =  20926062  feet ;   log  a  =  7.3206875. 

b,  semi-minor  axis  =  20855 121  feet;   log  £  =  7.3192127. 

^2  ^2 

e2  = —  =  0.00676866  ;  log  e2  =  7.8305030—  10. 

With  these  values  for  the  figure  of  the  earth,  the  formula  for  computing 
any  portion  of  a  quadrant  of  the  meridian  is 

Meridional  distance  in  feet=  [5.5618284]  A  <£  (in  degrees), 

—  [5.0269880]  cos  2<f>  sin  A  <#>, 
+  [2.0528]  cos  4$  sin  2  A  <£, 

in  which  2<£  =  <£2  +  <£, ,   A<£  —  <t>2  —  fa ,  fa ,  <f>2  =  end  latitudes  of  arc. 

For  the  length  of  i  degree,  the  formula  becomes  : 
i  degree  of  the  meridian,  in  feet=  364609.9  —  1857.1  cos  2<£  -f  3.94  cos  4^. 

The  length  of  the  parallel  is  given  by  the  equation 

i  degree  of  the  parallel  at  latitude  <f>,  in  feet  = 

365538.48  cos  <£  — 310.17  cos  3^  +  0.39  cos  5^. 

TABLE     59. 

TABLE   59.     Length  of  one  degree  of  the  meridian  at  different  latitudes. 

This  gives  for  every  degree  of  latitude  the  length  of  one  degree  of  the 
jneridian  in  statute  miles  to  three  decimals,  in  metres  to  one  decimal,  and 
in  geographic  miles  to  three  decimals — the  geographic  mile  being  here 
defined  to  be  one  minute  of  arc  on  the  equator.  The  values  in  metres  are 
computed  from  the  relation  :  i  metre  =  39.3700  inches.  The  tabular  values 
represent  the  length  of  an  arc  of  one  degree,  the  middle  of  which  is 
situated  at  the  corresponding  latitude.  For  example,  the  length  of  an  arc 
of  one  degree  of  the  meridian,  whose  end  latitudes  are  29°  30'  and  30°  30'  is 
68.879  statute  miles. 

*  Comparisons  of  standards  of  length,  made  at  the  Ordnance  Survey  office,  South- 
ampton, England,  by  Capt.  A.  R.  Clarke,  R.  E.,  1866. 


INTRODUCTION. 

TABLE     60. 

TABLE   6O.     Length  of  one  degree  of  the  parallel  at  different  latitudes. 
This  table  is  similar  to  Table  59. 

TABLE   61.     Duration  of  sunshine  at  different  latitudes  for  different  values 
of  the  sun's  declination. 

Let  Z  be  the  zenith,  and  NH  the  hori- 
zon of  a  place  in  the  northern 
hemisphere. 

P  the  pole; 

QEQ'  the  celestial  equator; 

RR'  the  parallel  described  by  the  sun  on 
any  given  day; 

,S  the  position  of  the  sun  when  its  upper 
limb  appears  on  the  horizon  ; 

PN  the  latitude  of  the  place,  <£. 

•ST'the  sun's  declination,  8. 

PS  the  sun's  polar  distance,  90°  —  8. 

ZSthe  sun's  zenith  distance,  z. 
ZPS  the  hour  angle  of  the  sun  from  meridian,  /. 

r  the  mean  horizontal  refraction  =  34'  approximately. 
^  the  mean  solar  semi-diameter  =  16'  " 

z  •=  90°  +  r  +  s  =  90°  50' 

In  the  spherical  triangle  ZPS,  the  hour  angle  ZPS  may  be  computed 
from  the  values  of  the  three  known  side  by  the  formula 

sin  $  ZPS  =    fsin  j  (ZS  +  PZ—  PS)  sin  j-  (ZS  +  PS-PZ) 
\  sin  PZ  sin  PS 

or  sin|/  =    lsmiCg  +  S-<fr)sini(2'-S+"^ 

\  cos  <j>  cos  8 

The  hour  angle  t,  converted  into  mean  solar  time  and  multiplied  by  2 
is  the  duration  of  sunshine. 

Table  61  has  been  computed  for  this  volume  by  Prof.  Wm.  Libbey,  jr. 
It  is  a  table  of  double  entry  with  arguments  8  and  <f>.  For  north  latitudes 
northerly  declination  is  considered  positive  and  southerly  declination  as 
negative.  The  table  may  be  used  for  south  latitudes  by  considering 
southerly  declination  as  positive  and  northerly  declination  as  negative. 

The  top  argument  is  the  latitude,  given  for  every  5°  from  o°  to  40°,  for 
every  2°  from  40°  to  60°,  and  for  every  degree  from  60°  to  8o.° 

The  side  argument  is  the  sun's  declination  for  every  20'  from  5  23°  27' 
to  N  23°  27'. 

The  duration  of  sunshine  is  given  in  hours  and  minutes. 

To  find  the  duration  of  sunshine  for  a  given  day  at  a  place  whose 
latitude  is  known,  find  the  declination  of  the  sun  at  mean  noon  for  that  day 
in  the  Nautical  Almanac,  and  enter  the  table  with  the  latitude  and  declination 
as  arguments. 


CONVERSION    OF    LINEAR    MEASURES.  xlix 

Example : 

To  find  the  duration  of  sunshine,  May  18,  1892,  in  latitude  49°  30'  North. 
From  the  Nautical  Almanac,  S  =  19°  43'  N. 

From   the   table,  with  8  =19°  43'  N  and  ^  =  49°  30',  the   duration  of 
sunshine  is  found  to  be  15*  31"*. 

TABLE     62. 

TABLE  62.  Declination  of  the  sun  for  the  year  1899. 

This  table  is  an  auxiliary  to  Table  61,  and  gives  the  declination  of  the 
sun  for  every  third  day  of  the  year  1899.  These  declinations  may  be  used 
as  approximate  values  for  the  corresponding  dates  of  other  years  when  the 
exact  declination  can  not  readily  be  obtained.  Thus,  in  the  preceding 
example,  the  declination  for  May  18,  1892,  may  be  taken  as  approximately 
the  same  as  that  for  the  same  date  in  1899,  viz.  19°  37'. 

RELATIVE  INTENSITY  OF  SOLAR  RADIATION  AT  DIFFERENT  LATITUDES  FOR 
DIFFERENT  SEASONS  OF  THE  YEAR. 

TABLE  63.         Mean  intensity  for  24  hours  of  solar  radiation. 

This  table  is  that  of  Prof.  Wm.  Ferrel,  published  in  the  Annual  Report 
of  the  Chief  Signal  Officer,  1885,  Part  2,  and  in  Professional  Papers  of  the  Sig- 
nal Service,  No.  14,  p.  427,  where  the  formulae  and  constants  will  be  found. 

It  gives  the  mean  intensity  /  for  24  hours  of  solar  radiation  received  by 
a  horizontal  surface  at  the  top  of  the  atmosphere,  in  terms  of  the  mean  solar 
constant  A0,  for  each  tenth  parallel  of  latitude  of  the  northern  hemisphere, 
and  for  the  first  and  sixteenth  day  of  each  month  ;  also  the  values  of  the 
solar  constant  A  in  terms  of  AQt  and  the  longitude  of  the  sun  for  the  given 
dates. 


.  CONVERSION  OF  LINEAR  MEASURES. 

The  relation  here  adopted  between  the  metre  and  the  English  measures 
of  length  is  i  metre  =  39. 3700  inches  as  legalized  by  Act  of  U.  S.  Congress, 
July  28,  1866,  although  recent  comparisons  give  39.370113  inches. 

TABLE    64. 

TABLE  64.  Inches  into  millimetres. 

i  inch=  25.40005  millimetres. 

The  argument  is  given  for  every  hundredth  of  an  inch  up  to  32.00 
inches,  and  the  tabular  values  are  given  to  hundredths  of  a  millimetre.  A 
table  of  proportional  parts  for  thousandths  of  an  inch  is  added  on  each  page. 
Example : 

To  convert  24.362  inches  to  millimetres. 

The  table  gives  (p.  184) 

(24.36  -f  0.02)  inches  =  (6 1 8. 75  +  0.05  mm.)  =  618.80  mm. 


1  INTRODUCTION. 

TABLE   65.  Millimetres  into  inches. 

From  o  to  400  mm.  the  argument  is  given  to  every  millimetre,  with 
subsidiary  interpolation  tables  for  tenths  and  hundredths  of  a  millimetre. 
The  tabular  values  are  given  to  four  decimals.  From  400  to  1000  mm., 
covering  the  numerical  values  which  are  of  frequent  use  in  meteorology 
for  the  conversion  of  barometric  readings  from  the  metric  to  the  English 
barometer,  the  argument  is  given  for  every  tenth  of  a  millimetre,  and  the 
tabular  values  to  three  decimals. 

Example  : 

To  convert  143.34  mm.  to  inches. 
The  table  gives 
J43  +  -3  +  -°4  mm-  =  5-6299  +  0.0118  +  0.0016  inches  =  5.6433  inches. 

TABLE   66.  Feet  into  metres. 

From  the  adopted  value  of  the  metre,  39.3700  inches— 
i  English  foot  =  0.3048006  metre. 

Table  66  gives  the  value  in  metres  and  thousandths  (or  millimetres) 
for  every  foot  from  o  to  99  feet ;  the  value  to  hundredths  of  a  metre  (or 
centimetres)  of  every  10  feet  from  100  to  4000  feet ;  and  the  value  to  tenths 
of  a  metre  of  every  10  feet  from  4000  to  9090  feet.  In  using  the  lattei 
part,  the  first  line  of  the  table  serves  to  interpolate  for  single  feet. 

Example : 

To  convert  47  feet  7  inches  to  metres.     47-  feet  7  inches  =47.583  feet. 
The  table  gives  47      feet  =  14.326  metres. 

By  moving  the  decimal  point,  °'5%3  «      :   <M7^ 

47.583  feet=  14.504  metres. 

TABLE   67.  Metres  into  feet. 

i  metre  =  39.3700  inches  =  3.280833  -f  feet. . 

From  o  to  500  metres  the  argument  is  given  for  every  unit,  and  the 
tabular  values  to  two  decimals ;  from  500  to  5000  the  argument  is  given  tc 
every  10  metres,  and  the  tabular  values  to  one  decimal.  The  conversion  foi 
tenths  of  a  metre  is  added  for  convenience  of  interpolation. 

example  : 

Convert  4327  metres  to  feet. 
The  table  gives 

-f  7)  metres  =  (14173.2  -f  23.0)  feet  =  14196.2  feet. 


CONVERSION   OF   MEASURES   OP   TIME    AND   ANGLE.  11 

TABLE   68.  Miles  into  kilometres.  TABLE  SB. 

i  mile=  1.609347  kilometres. 

The  table  extends  from  o  to  1000  miles  with  argument  to  single  miles, 
and  from  1000  to  20000  miles  for  every  1000  miles.  The  tabular  quantities 
are  given  to  the  nearest  kilometre. 

TABLE   69.  Kilometres  into  miles.  TABLE  69. 

i  kilometre  =  0.62 1 370  mile. 

The  table  extends  to  1000  kilometres  with  argument  to  single  kilo- 
metres, and   from    1000   to   20000   kilometres   for   every   1000   kilometres. 
Tabular  values  are  given  to  tenths  of  a  mile. 
Example  : 

Convert  3957  kilometres  into  miles. 
The  table  gives 

(3000  +  957)  kilometres  =  (1864.  i  +  594.7)  miles  =  2458.8  miles. 

TABLE    70.         Interconversion  of  nautical  and  statute  miles.  TABLE  70. 

The  definition  of  the  nautical  mile  here  used  is  that  adopted  by  the 
U.  S.  Coast  and  Geodetic  Survey. 

A  nautical  mile  is  equal  to  the  length  of  one  minute  of  arc  on  the 
great  circle  of  a  sphere  whose  surface  is  equal  to  the  surface  of  the  earth. 

Computed  on  Clarke's  spheroid  of  1866,  the  nautical  mile  thus  defined 
equals  6080.27  feet.  (Report,  U.  S.  Coast  Survey,  1881,  page  354.) 

The  table  gives,  for  nautical  and  statute  miles  from  i  to  9,  the  equivalent 
in  statute  and  nautical  miles,  respectively,  to  four  decimals. 

TABLE    71. 

TABLE   71.     Continental  measures  of  length  with  their  mehic  and  English 
equivalents. 

This  table  gives  a  miscellaneous  list  of  continental  measures  of  length 
alphabetically  arranged,  with  the  name  of  the  country  to  which  they  belong 
and  their  metric  and  English  equivalents. 


CONVERSION   OF   MEASURES   OF  TIME  AND  ANGLE. 
TABLE    72.  Arc  into  time. 

i°  =  4m;    i'=4s;    i"  =  ^s  =  o-?o67.  TABLET* 

Example  : 

Change  124°  15'  2477  into  time. 

From  the  table,  124°  8h      i6m      os 

15''  x         ° 

24"  i.  600 

o'.'7       =  -047 


8h 


Hi  INTRODUCTION. 

TABLE   73.  Time  into  arc. 

ih=i5°;    ira  =  i5';    Is  =  15". 
Example  : 

Change  8h  I7m  1^647  into  arc. 

From  the  table,  8h  120° 

i7m       =  4 


Is  15" 


0.64    =  9.60 

By  moving  the  decimal  point,    .007  =  o.  10 


124°      15'      24/./7 

TABLE   74.  Days  into  decimals  of  a  year  and  angle. 

The  table  gives  for  the  beginning  of  each  day  the  corresponding  decimal 
of  the  year  to  five  places.  Thus,  at  the  epoch  represented  by  the  beginning 
of  the  1  5th  day,  the  decimal  of  the  year  that  has  elapsed  since  January  i.o 

is  computed  from  the  fraction  --  —  .     The  corresponding  value  in  angle 

o 


obtained  by  multiplying  this  fraction  by  360°,  is  given  to  the  nearest  minute. 
Two  additional  columns  serve  to  enter  the  table  with  the  day  of  the 
month  either  of  the  common  or  the  bissextile  year  as  the  argument,  and 
may  be  used  also  for  converting  the  day  of  the  month  to  the  day  of  the 
year,  and  vice  versa. 

Example  : 

To  find  the  number  of  days  and  the  decimal  of  a  year  between  February 

12  and  August  27  in  a  bissextile  year. 

Aug.  27  :  Day  of  year  =  240  ;  decimal  of  a  year  =  0.65435 

Feb.   12:     "     "      "          43;        "  =0.11499 

Interval  in  days  =  197  ;   interval  in  decimal  of  a  year      =  0.53936 

The  decimal  of  the  year  corresponding  to  the  interval  197  days  may 
also  be  taken  from  the  table  by  entering  with  the  argument  198. 

TABLE   75.     Hours,  minutes  and  seconds  into  decimals  of  a  day. 

The  tabular  values  are  given  to  six  decimals. 
Example  : 

Convert  5h  24m  23?4  to  the  decimal  of  a  day  : 

5h     =     0^208333 

24m     =         016667 

23s      =  266 

By  interpolation,  or  by  moving  the  decimal  for  4s   0.4   =  5 

0^225271 


CONVERSION   OF  MEASURES   OF  TIMB   AND   ANGLE. 


liii 


TABLE   76.     Decimals  of  a  day  into  hours,  minutes  and  seconds. 

Example  : 

Convert  0^225  271  to  hours,  minutes  and  seconds  : 

0.22          day  =  4h  48™  -f-  28m  48*  =  5*  i6m  48s 
0.0052      day  =  7m  12s  +  i7f28       =          7     29.28 
0.000071  day  =     6?05    +      0.09     =  6.14 


TABLE    76. 


TABLE   77.        Minutes  and  seconds  into  decimals  of  an  hour. 
The  tabular  values  are  given  to  six  decimals. 

Example  : 

Convert  34m  28^7  to  decimals  of  an  hour. 

34m     =    0*566667 

28s      =  7778 

o!7    =  194 


o.574639 


TABLE    78 


TABLE  78.  Local  mean  time  at  apparent  noon. 

This  table  gives  the  local  mean  time  that  should  be  shown  by  a  clock 
when  the  centre  of  the  sun  crosses  the  meridian,  on  the  ist,  8th,  i6th,  and 
24th  days  of  each  month.  The  table  is  useful  in  correcting  a  clock  by  means 
of  a  sun-dial  or  noon-  mark. 

Example  : 

To  find  the  correct  local  mean  time  when  the  sun  crosses  the  meridian 

on  December  15,  1891. 

The  table  gives  for  December  16,  nh  56™.  By  interpolating,  it  is  seen 
that  the  change  to  December  15  would  be  less  than  one-half  minute  ; 
the  correct  clock  time  is  therefore  4  minutes  before  12  o'clock  noon. 


TABLE   79. 
TABLE    80. 


Sidereal  time  into  mean  solar  time. 
Mean  solar  time  into  sidereal  time. 


TABLES    79,    80. 


According  to  Bessel,  the  length  of  the  tropical  year  is  365.24222  mean 
solar  days,*  whence 

365.24222  solar  days  =  366.24222  sidereal  days. 

Any  interval  of  mean  time  may  therefore  be  changed  into  sidereal 
time  by  increasing  it  by  its  —  -  part,  and  any  interval  of  sidereal  time 


365.24222 
may  be  changed  into  mean  time  by  diminishing  it  by  its 


366.24222 


part. 


*The  length  of  the  tropical  year  is  not  absolutely  constant.    The  value  here  given 
is  for  the  year  1800.     Its  decrease  in  100  years  is  about  0.6  s. 


Hv  INTRODUCTION. 

Table  79  gives  the  quantities  to  be  subtracted  from  the  hours,  minutes 
and.  seconds  of  a  sidereal  interval  to  obtain  the  corresponding  mean  time 
interval,  and  Table  80  gives  the  quantities  to  be  added  to  the  hours,  minutes 
and  seconds  of  a  mean  time  interval  to  obtain  the  corresponding  sidereal 
interval.  The  correction  for  seconds  is  sensibly  the  same  for  either  a  sidereal 
or  a  mean  time  interval  and  is  therefore  given  but  once,  thus  forming  a  part 
of  each  table. 
Examples  : 

Change  i4h  25"*  36f2  sidereal  time  into  mean  solar  time. 

Given  sidereal  time  i4h     25m 

Correction  for  i4h  =  —  2m  i7!6i 

25m  4.10 

=  —  10 


—  2       21. 8l  —2          21. i 


Corresponding  mean  time  14      23        14.4 

Change  i3b  37m  22^7  mean  solar  time  into  sidereal  time. 
Given  mean  time  i3h    37™     22?7 

Correction  for  I2h  =  -f-  2m     8?  13 

37m  =  +          6.08 

22?7  =  -f  0.06 


+  2       14.27  +  2          14-3 

Corresponding  sidereal  time  13      39       37.0 


MISCELLANEOUS  TABLES. 

WEIGHT  IN  GRAMMES  OF  A  CUBIC  CENTIMETRE  OF  AIR. 

The  following  tables  (81  to  86)  give  the  factors  for  computing  the 
weight  of  a  cubic  centimetre  of  air  at  different  temperatures,  humidities  and 
pressures. 

s  =  0.00129305  [7.1 1 1 615  3]  /b  —  o.378<?\ 
1+0.00367*  \      760       / 

in  which  d  is  the  weight  of  a  cubic  centimetre  of  air  expressed  in  grammes, 
under  the  standard  value  of  gravity  at  latitude  45°  and  sea 
level. 
b  is  the  atmospheric  pressure  in  millimetres. 

e  is  the  pressure  of  aqueous  vapor  in  millimetres. 
/  is  the  temperature  in  Centigrade  degrees. 

For  dry  atmospheric  air  (containing  0.0004  of  its  weight  of  carbonic 
acid)  at  a  pressure  of  760  mm.  and  temperature  o°  C.,  the  absolute  density, 


MISCELLANEOUS   TABLES.  lv 

or  the  weight  of  one  cubic  centimetre,  is  0.00129305  gramme.  (Inter- 
national Bureau  of  Weights  and  Measures:  Travaux  et  Memoires,  t.  i, 
p.  A  54.) 

The  weight  of  a  cubic  centimetre  may  also  be  written  as  follows  : 

d  __  0.00129305  (b  ~  0.378  e\ 

i  +  0.0020389  (t  —  32°)  V     29.921     / 

where  o  is  defined  as  before,  but  b  and  e  are  expressed  in  inches  and  /  itr 
Fahrenheit  degrees.  Thus  by  the  use  of  tables  based  on  these  two  formulae, 
lines  of  equal  atmospheric  density  may  be  drawn  for  the  whole  world,  no 
matter  whether  the  original  observations  are  in  English  or  metric  measures. 
The  gravity  factor  given  in  Table  104  is  needed  since  weights  in  different 
latitudes  are  to  be  considered. 

ENGLISH    MEASURES.  TABLES    81,   82  83. 

TABLE  81.     Temperature  Term. 

This  table  gives  the  values  and  logarithms  of  the  expression 

0.00129305 

°t,  29.921  =••  i  H-  0.0020389  (/  —  32°  ) 

for  values  of  /extending  from — 45°  F.  to  140°  F.,  the  intervals  between 
o°  F.  and  110°  F.  being  i°. 

The  tabular  values  are  given  to  five  significant  figures. 

TABLE  82.      Term  for  humidity ,°  auxiliary  to   Table  83. 


TABLE  83.     Humidity  and  pressure  term. 


_  b  —  0.378  e 


29.921  29.921 


Tabie  82  gives  values  of  0.378  e  to  three  decimal  places  as  an  aid  to  the 
use  of  Table  83.  The  argument  is  the  dew-point  given  for  every  degree 
from  —  40°  F.  to  140°  F.  The  second  column  gives  the  corresponding 
values  of  the  vapor  pressure  (<?)  derived  from  L,andolt-B6rnstein  Phys.-Chem. 
Tabellen,  Berlin,  1905. 

Table  83  gives  values  and  logarithms  of =  —  "°'37    -  for  values 

29.921         29.921 

of  h  extending  from  10.0  to  31.7  inches.     The  logarithms  are  given  to  five 
significant  figures  and  the  corresponding  numbers  to  four  decimals. 

Example  : 

The  air  temperature  is  68°  F.y  the  pressure  is  29.36  inches  and  the  dew- 
point  51°  F.     Find  the  logarithm  of  the  density. 

Table  8 1 ,  for  t  =  68f  F. ,  gives  7.08085  —  10 

Table  82,  for  dew-point  51°,  gives  0.378  £  =  0.141  inch, 
Table  83,  for  h  =  £  —  0.378  e  =  29.36  —  0.14  =  29.22,  gives    9.98941  —  10 

3° 

Logarithm  of  density—  7.07056  —  10 


v  INTRODUCTION. 

METRIC    MEASURES.  TABLES  84,  85,  £6. 

TABLE  84.      temperature  term. 

This  table  gives  values  and  logarithms  of  the  expression 

9  0.00129305 

/,  760  —  j  +  0.00367  t 

for  values  of  /  extending  from  —  34°  C.  to  69°  C.  The  tabular  values  are 
given  to  five  significant  figures. 

TABLE  85.      Term  for  humidity  ;  auxiliary  to  Table  86. 

TABLE  86.     Humidity  and  pressure  terms.     -.  — 

760  760 

Table  85  gives  values  of  0.378*?  to  hundredths  of  a  millimetre  for  dew- 
points  extending  by  intervals  of  i  °  from  —  30°  C.  to  50°  C.  The  values  of 
the  vapor  pressures  (<?)  corresponding  to  these  dew-points  are  given  in  a 
second  column  to  hundredths  of  a  millimetre,  as  taken  from  Landolt-Born- 
stein  Phys.-Chem.  Tabellen,  Berlin,  1905. 

Table  86  gives  values  and  logarithms  of  -   -  =  -      --^- —  for  values  of 

760  760 

//  extending  from  300  to  800  mm.  The  atmospheric  pressure  b  is  the  barom- 
eter reading  corrected  for  gravity  and  0.378^  is  the  term  for  humidity 
obtained  from  Table  85.  The  logarithms  are  given  to  five  significant  figures 
and  the  corresponding  numbers  to  four  decimal  places. 

TABLE  87.     Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes. 

The  comparisons  of  July,  1893,  made  by  the  International  Bureau 
of  Weights  and  Measures  between  the  Imperial  standard  pound  and  the 
•' '  kilogramme  proto-type  ' '  resulted  in  the  relation  : 

i  pound  avoirdupois  =  453.592  427  7  grammes. 

For  the  conversion  of  pounds,  Table  87  gives  the  argument  for 
every  tenth  of  a  pound  up  to  9.9,  and  the  tabular  conversion  values  to 
ten-thousandths  of  a  kilogramme. 

For  the  conversion  of  ounces,  the  argument  is  given  for  every  tenth  of 
an  ounce  up  to  15.9,  and  the  tabular  values  to  ten-thousandths  of  a  kilo- 
.gramme. 

TABLE   88.     Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces , 
From  the  above  relation  between  the  pound  and  the  kilogramme, 

i  kilogramme—    2.204622  avoirdupois  pounds. 
=  35.274        avoirdupois  ounces . 


MISCELLANEOUS    TABLES.  Ivli 

The  table  gives  the  value  to  thousandths  of  a  pound  of  every  tenth  oi 
a  kilogramme  up  to  9.9  ;  the  values  of  tenths  of  kilogrammes  in  ounces  to 
four  decimals  ;  and  the  values  of  hundredths  of  a  kilogramme  in  pounds  and 
ounces  to  three  and  two  decimals  respectively. 

TABLES    89,    9O 

TABLE   89.     Conversion  of  grains  into  grammes. 
TABLE   9O.     Conversion  of  grammes  into  grains. 

From  the  above  relation  between  the  pound  and  the  kilogramme, 

i  gramme  =  15.432356  grains. 

i  grain      =    0.06479892  gramme. 

Table  89  gives  to  ten-thousandths  of  a  gramme  the  value  of  every 
grain  from  i  to  99,  and  also  the  conversion  of  tenths  and  hundr  »dths  of  a 
grain  for  convenience  in  interpolating. 

Table  90  gives  to  hundredths  of  a  grain  the  value  of  every  tenth  of  a 
gramme  from  o.  i  to  9.9,  and  the  value  of  every  gramme  from  i  to  99.  The 
values  of  hundredths  and  thousandths  of  a  gramme  are  added  as  an  aid  to 
interpolation. 

The  computation  of  these  two  tables  has  been  furnished  by  Professor 
William  Libbey,  who  has  used  the  relation,  i  gramme  =  15.432  531  grains. 
This  value  is  practically  identical  with  the  relation  above  adopted,  differing 
from  it  by  about  i  part  in  3,000,000. 

TABLE     91 

TABLE   91.     Conversion  of  units  of  magnetic  intensity. 


This  table  gives  the  conversion  factors  from  i  to  9  for  converting 
lish  measures  of  magnetic  intensity  into  C.  G.  S.  measures,  and  vice  versa. 

The  English  unit  of  magnetic  intensity  is  the  force  which,  acting  for 
i  second  on  a  unit  of  magnetism  associated  with  a  mass  of  i  grain,  produces 
a  velocity  of  i  foot  per  second. 

The  C.  G.  S.  unit  of  magnetic  intensity  is  the  dyne  —  the  force  which, 
acting  upon  one  gramme  for  i  second,  generates  a  velocity  of  i  centimetre 
per  second.  The  Gaussian  unit  of  magnetic  intensity,  which  has  been 
extensively  used,  is  a  force  which,  acting  upon  a  mass  of  i  milligramme  for 
i  second,  generates  a  velocity  of  i  millimetre  per  second. 

By  using  the  dimensions  of  magnetic  intensity  [M^/I^T],  the  inter- 
conversion  of  these  units  is  easily  made. 


C.  G.  S.  unit  =  J1000  M  Gaussian  units 

^1        IO  Iy 

=        10        Gaussian  units 


i  C.  G.  S.  unit  =  ^   I5-4323501V1  Engiish  units 

.03280833  L 
=       21.6882  English  units 


INTRODUCTION. 

TABLE    92.     Quantity  of  water  corresponding  to  given  depths  of  rainfall. 

This  table  gives  for  different  depths  of  rainfall  over  an  acre  the  total 
quantity  of  water  measured  in  gallons  and  tons. 

TABLE  93.     Atmospheric  water  vapor  lines  in  the  visible  spectrum. 

The  following  table,  prepared  by  the  Astrophysical  Observatory  at 
Washington,  gives  a  summary  of  lines  in  Rowland's  "  Preliminary  Table  of 
Solar  Spectrum  Wave  Lengths,"  recorded  as  of  atmospheric  water  vapor 
origin.  There  are  more  than  400  such  lines  in  Rowland's  table,  but  an 
abridgment  is  here  made  as  follows  : 

Only  lines  of  intensity  "  i  "  or  greater  are  here  separately  given,  but 
the  total  number  and  average  intensity  of  the  fainter  lines  lying  between 
these  are  inserted.  Rowland's  scale  of  intensities  is  such  that  a  line  of 
intensity  "  i  "  is  "  just  clearly  visible  "  on  Rowland's  map  ;  the  //and  A' 
lines  are  of  intensity  1,000;  D±  (the  sodium  line  of  greater  length),  20; 
C,  40.  "  Lines  more  and  more  difficult  to  see  "  are  distinguished  by  o,  oo, 
ooo,  and  oooo. 

TABLE  93.     Absorption  by  atmospheric  ivater-vapor  in  the  infra-red  spectrum. 
See  the  text  on  pages  234-235. 

TABLE  94.  Division  by  28  of  numbers  from  28  to  867972. 
TABLE  95.  Division  by  29  of  numbers  from  29  to  898971. 
TABLE  96.  Division  by  31  of  numbers  from  31  to  960969. 

The  frequent  occasion  in  meteorological  work  to  divide  by  the  numbers 
28,  29  and  31  renders  useful  the  division  tables  compiled  by  Mr.  H.  A. 
Hazen  (Handbook  of  Meteorological  Tables,  Washington,  D.  C.,  1888),  the 
use  of  which  has  been  kindly  granted. 

As  here  printed,  the  dividend  is  given  in  plain  type  and  the  quotient  in 
heavy-face  type,  and  in  order  that  one  shall  never  be  mistaken  for  the  other,  a 
column  is  given  containing  the  letters  D  and  Q  successively,  which 
designates  that  all  figures  on  a  line  with  D  are  dividends,  and  all  on 
a  line  with  Q  are  quotients.  The  four  columns  to  the  right  of  this  D-Q 
column  give  the  last  two  figures  of  the  dividend  and  of  the  quotient, 
namely,  the  units  and  tens.  The  ten  columns  to  the  left  side  of  the 
D-Q  column  give  the  preceeding  figures  of  the  dividend,  namely,  the 
hundreds,  thousands,  and  tens  of  thousands.  These  two  parts  of  the 
dividend — to  the  left  and  right  of  the  D-Q  column — are  always  to  be  taken 
on  the  same  horizontal  line. 

Each  dividend  is  an  exact  multiple  of  the  divisor,  hence  each  quotient 
is  exact  or  without  remainder. 

For  example,  the  dividend  17360  in  Table  94  is  found  in  two  parts  ; 
173  is  found  in  the  column  headed  600  on  the  left-hand  side  of  the  D-Q 
column,  and  60  in  the  same  horizontal  row  in  the  third  column  on  the  right- 
hand  side. 

The  hundreds  figure  of  the  quotient  is  given  in  bold-face  type  at  the 
top,  middle  and  bottom  of  the  page,  and  each  one  obtains  for  all  the  dividend 
figures  in  its  own  column.  The  units  and  tens  figures  of  the  quotient  are 
found,  as  already  stated,  on  the  right  side  of  the  D-Q  column  directly  under 


MISCELLANEOUS    TABLES.  X 

the  last  two  ngures  of  the  dividend.  Thus  m  the  above  example,  for  dividend 
17360  the  hundreds  figure  of  the  quotient  is  6  and  the  units  and  tens  will  be 
20,  or  the  quotient  of  17360  divided  by  28  is  620.  When  any  given  dividend 
is  not  an  exact  multiple  of  the  divisor,  the  nearest  even  multiple  as  given  in 
the  table  must  be  used. 

For  example,  23979  -*-  28  =  856  ;  the  8  is  in  the  9th  column  above  239 
and  the  56  is  under  68,  the  nearest  figure  to  79  in  the  right-hand  part  of 
the  table. 

The  last  column,  which  is  separated  from  the  rest  of  the  table  by  a 
triple  line,  is  to  be  used  when  the  quotient  exceeds  three  figures,  or  999. 

The  bold-face  figures  in  this  column  give  the  thousands  and  tens  of 
thousands  figures  of  the  quotient,  and  the  plain  figures  are  the  multiples 
thereof  by  the  divisor.  To  use  the  column,  find  in  it  the  number  which, 
with  three  ciphers  added,  comes  nearest  to  (but  is  less  than)  the  dividend  ; 
the  heavy-face  figures  beneath  it  will  be  the  first  figures  of  the  quotient. 
Subtract  this  multiple  number  from  the  given  dividend,  and  with  the 
remainder  enter  the  main  body  of  the  table  to  obtain  the  last  three  figures 
of  the  quotient  as  already  described. 

For  example  :  Divide  833885  by  28.  The  nearest  figure  to  833000  in  the 
last  column  is  812000  and  the  quotient  29000.  833885  —  812000  —  21885. 
Under  218  we  have  7,  and  under  96,  the  nearest  figure  to  85  on  the  right, 
we  find  82.  833885-^28  —  29782. 

TABLE     97. 

TABLE   97.     Natural  sines  and  cosines. 

TABLE     98. 

TABLE   98.     Natural  tangents  and  cotangents. 

TABLE     99. 

TABLE   99.     Logarithms  of  numbers. 

TABLE   1OO, 

TABLE  100.     Bigelow's  standard  system  of  notation  and  formula. 

These  are  taken  from  the  Report  of  the  Chief  of  the  Weather  Bureau, 
International  Cloud  Observations,  1898-1899,  pages  485  to  570  ;  also  Report 
on  Barometry,  pages  58  to  68.  Many  abridgments  and  some  slight  modifi- 
cations have  been  made.  All  of  the  diagrams,  definitions,  and  formulae  for 
polar  curves,  motion  relative  to  moving  axes,  etc. ,  have  been  omitted. 

TABLE    101. 

TA  B  LE  1 01 .     List  of  meteorological  stations. 

The  list  of  meteorological  stations  has  been  compiled  for  this  volume 
from  data  in  the  library  of  the  United  States  Weather  Bureau.  Dr.  Stai  - 
islav  Hanzlik,  with  the  help  of  the  librarian  and  assistants,  rechecked  the 
existing  list.  In  many  cases  the  old  list  was  found  not  to  correspond  with 
present  conditions.  Letters  were  addressed  to  the  central  offices  of  the 
Italian,  Belgian,  Austrian,  and  German  meteorological  services,  and  the 
list  has  been  corrected  to  agree  with  the  replies  received. 

In  Asia  a  new  subdivision  has  been  made,  namely,  India,  with  neigh- 
boring islands,  Central  and  East  Asia  (China  and  Indo-China) ,  Siberia  with 
Russia,  Japan  with  Korea,  and  the  Philippines  with  Hawaii.  The  division 
of  Miscellaneous  Islands  has  been  abandoned. 


IX  MISCELLANEOUS  TABLES- 

In  making  the  selection  of  stations  from  the  vast  number  available,  the 
object  has  been  to  choose  such  of  the  higher  order  stations  as  will  fairly 
represent  the  varied  climatic  conditions  of  each  country.  With  few  excep- 
tions, the  stations  are  active  ;  in  all  cases  there  are  published  observations, 
which  may  generally  be  found  in  the  monthly  and  annual  reports  of  the 
national  meteorological  services  of  the  countries  in  which  the  stations  are 
situated,  or  by  which  they  are  politically  controlled. 

So  far  as  known,  the  list  contains  all  first  order  stations,  i.  e. ,  those  at 
which  the  principal  meteorological  elements  are  either  recorded  continuously 
and  automatically,  or  are  observed  at  hourly  or  bi-hourly  intervals ;  such 
stations  are  designated  by  an  asterisk  (*). 

The  names  of  the  stations  have  been  given  in  the  native  orthography, 
which  is  in  all  cases  the  form  adopted  by  the  respective  national  meteoro- 
logical services  in  their  official  publications. 

TABLE  102.     International  meteorological  symbols. 

The  symbols  and  definitions  adopted  by  the  Permanent  International 
Meteorological  Committee  have  been  occasionally  modified  by  succeeding 
Congresses  and  are  here  given  in  accord  with  the  latest  decisions.  For 
fuller  details  see  the  U.  S.  Monthly  Weather  Review  for  December,  1905, 
and  August,  1906. 

TABLE  103.     Beaufort's  notation  for  use  at  sea. 

The  wind  scale  and  other  notations  introduced  by  Beaufort  about  1800 
still  continue  in  use  at  sea,  and  are  here  given  about  as  issued  in  the  official 
instructions  to  American  and  English  navigators — they  are  also  used  by 
seamen  of  many  other  nations. 

TABLE  104.     Acceleration  of  apparent  gravity . 

This  is  essentially  a  copy  of  the  similar  table  in  the  Smithsonian  Geo- 
graphical Tables. 


THERMOMETRICAL    TABLES. 

Conversion  of  thermometric  scales — 

Absolute,  Centigrade,  Fahrenheit,  and  Reaumur  scales     .     .  TABLE  I 

Fahrenheit  scale  to  Centigrade        TABLE  2 

Centigrade  scale  to  Fahrenheit       TABLE  3 

Centigrade  scale  to  Fahrenheit,  near   the  boiling  point  of 

water TABLE  4 

Differences  Fahrenheit  to  differences  Centigrade   ....  TABLE  5 

Differences  Centigrade  to  differences  Fahrenheit   ....  TABLE  6 

Reduction  of  temperature  to  sea  level  —  English  measures      .  TABLE  7 

Reduction  of  temperature  to  sea  level  —  Metric  measures   .     .  TABLE  8 

Correction  for  the  temperature  of  the  thermometer  stem  for 

Fahrenheit  and  Centigrade  thermometers    .       .      .      .  TABLE  9 


TABLE  1. 

ABSOLUTE,  CENTIGRADE,  FAHRENHEIT,  AND  REAUMUR  SCALES. 


363 
358 

353 

348 
343 
33» 
333 
328 

323 


308 

303 
298 

293 
288 

283 
278 

273 
268 
263 
258 

253 
248 

243 
238 

233 
128 
223 
218 

213 
208 
203 
198 

193 
188 

183 


C. 


F. 


100 
95 
go 
85 
80 

75 
70 

65 

60 

55 
5o 
45 
40 

35 
30 
25 
20 

15 
10 

5 
o 

-  5 

-  10 

-15 

-  20 

-25 
-30 

-35  | 

-  4O 

-45 
-50 
-55 
-60 

-65 

-70 

-75 
-80 

-85 
-90 


212 

203 
194 
I85 
176 
I67 
158 
149 
140 

131 
122 

H3 

IO4 

95 

86 

77 
68 

59 

50 

4i 

32 

23 

14 

5 

4 

13 

22 

31 
40 

49 

58 
67 
76 
85 

94 
103 

112 
121 
I30 


K. 


80 
76 
72 

68 
64 
60 
56 
52 
48 

44 
40 
36 
32 
28 
24 

20 

16 

12 

8 

4 
o 

4 
8 

12 

16 

20 

24 
28 
32 

36 

40 
44 
48 
52 
56 
60 
64 
68 
72 


A. 


178 

173 

1 68 

163 
158 

153 
148 

143 
138 
133 
128 
123 
118 

H3 
1 08 
103 


23 
18 

13 
8 

3 

2 

I 
O 


95 
100 
105 
no 

115 

1 20 

125 
130 
135 

140 

145 
150 

155 

160 
165 
170 

175 
180 

185 
190 

195 
200 
205 

2IO 

215 
22O 

225 
230 

235 
240 

245 
250 

255 
260 
265 
270 
271 
272 
273 


139 
148 

157 
-166 

•J75 
-184 

-193 

-  202 
-211 

-  220 

-  229 
•238 

-247 
-256 
265 
•274 
-283 

-  292 
-301 
-310 

•319 
-328 

-337 
-346 
-355 
-364 

-  373 
-382 

-39r 
-400 
-409 
-418 
-427 
436.0 

445-0 
454-0 
455  8 
457-6 
459-4 


R. 


76 

80 

84 

88 

92 

96 
100 
104 
1 08 

112 

116 

120 
124 
128 
I32 
136 
140 
•144 

•  148 
•152 

156 
l6o 

•  164 

168 

172 

•176 

•  1 80 
-184 
•188 

192 

•  196 

•  200 
204 
20S.O 
212.0 
2l6.0 
216.8 
217.6 
218.4 


C== 
F= 


5/9  (^-32) +  273  =^+273  =  5/4^  +  273 
5/9(/^-32)  =  5/4^  =  ^  — 273 
9/5  <T+32  =  9/4^+32  =  9/5  (^-273)4-32 
4/9  (^-32)  =4/5  <^=4/5  (A  —  273) 


PROPORTIONAL   PARTS. 

3456 


R 


3-6 
1.6 


5-4 
2.4 


7-2 
3-2 


9.0 

4.0 


10.8 
4.8 


7 

12.6 
56 


14.4 
6.4 


9 
16.2 

7.2 


R 


.44 


23456789 

I. II*       1.66*      2.22*       2.77*         3.33*         3.88*         4.44*         5.00* 

.88*     1.33*     1.77*    2.22*      2.66*      3.11*      3.55*      4.00* 


R 

CA 

F 


i 

1-25 
2.25 


2 

2.50 
4.50 


3 

3-75 
6-75 


4  5 

5.00       6.25 
9.00     11.25 


6 

7.50 
13-50 


7 

8-75 
15-75 


8 

IO.OO 

18.00 


9 

11.25 
20.25 


*These  last  decimal  figures  repeat  indefinitely. 
SMITHSONIAN  TABLES. 


TABLE  2 


FAHRENHEIT    SCALE    TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

C. 

c. 

C. 

c. 

c. 

c. 

c. 

c. 

+130° 

+54?44 

+54?5o 

+54^56 

+54°6i 

+54?67 

+54?72 

+54°78 

+54?83 

+54?89 

+54°94 

129 

53.89 

53-94 

54.00 

54.06 

54.ii 

54-17 

54-22 

54.28 

54-33 

54-39 

128 

53-33 

53-39 

53.44 

53.50 

53.56 

53.6i 

53.67 

53.72 

53.78 

53.83 

127 

52.78 

52-83 

52.89 

52.94 

53.00 

53.o6 

53-11 

53.17 

53-22 

53.28 

126 

52.22 

52.28 

52.33 

52.39 

52.44 

52.50 

52.56 

52.61 

52.67 

52.72 

+125 

+5L67 

-f5r-72 

+51.78 

+51.83 

+51.89 

+5L94 

+52.00 

+52.06 

+52.11 

+52.17 

124 

51.11 

51.17 

51.22 

51.28 

5L33 

51.39 

51-44 

5L50 

51.56 

51.61 

123 

50.56 

50.61 

50.67 

50.72 

50.78 

50.83 

50.89 

50-94 

51.00 

51.06 

122 

50.00 

50.06 

50.11 

50.17 

50.22 

50.28 

50.33 

50.39 

50.44 

50.50 

121 

49-44 

49-50 

49.56 

49.61 

49.67 

49.72 

49.78 

49.83 

49.89 

49-94 

+120 

+48.89 

+43.94 

+49.00 

+49-06 

+49.11 

+49.17 

+49-22 

+49.28 

+49-33 

+49-39 

119 

48.33 

48.39 

48.44 

48.50 

48.56 

48.61 

48.67 

48.72 

48.78 

48.83 

118 

47.78 

47.83 

47.89 

47-94 

48.00 

48.06 

48.11 

48.17 

48.22 

48.28 

117 

47.22 

47.28 

47.33 

47-39 

47.44 

47.50 

47.56 

47.6i 

47.67 

47.72 

116 

46.67 

46.72 

46.78 

46.83 

46.89 

46.94 

47.00 

47.06 

47.11 

47.17 

+  h5 

+46.11 

+46.17 

+46.22 

+46.28 

+46.33 

+46.39 

+46.44 

+46.50 

+46.56 

+46.61 

114 

45-56 

45-6i 

45.67 

45.72 

45.78 

45.83 

45-89 

45.94 

46.00 

46.06 

113 

45.00 

45.06 

45.11 

45.17 

45-22 

45.28 

45-33 

45-39 

45-44 

45.50 

112 

44-44 

44.50 

44.56 

44.61 

44.67 

44.72 

44.78 

44.83 

44.89 

44.94 

III 

43-89 

43.94 

44.00 

44.06 

44.11 

44.17 

44.22 

44.28 

44-33 

44-39 

+  110 

+43-33 

+43-39 

+43.44 

+43.50 

+43.56 

+43.6i 

+43.67 

+43.72 

+43.78 

+43.83 

109 

42.78 

42.83 

42.89 

42.94 

43.00 

43.06 

43-n 

43.17 

43-22 

43-28 

108 

42.22 

42.28 

42.33 

42.39 

42.44 

42.50 

42.56 

42.61 

42.67 

42.72 

107 

41.67 

41.72 

41.78 

41.83 

41.89 

41.94 

42.00 

42.06 

42.11 

42.17 

106 

41.11 

41.17 

41.22 

41.28 

41.33 

41.39 

41.44 

41.50 

41.56 

41.61 

+105 

+40.56 

+40.61 

+40.67 

+40.72 

+40.78 

+40.83 

+40.89 

+40.94 

+41.00 

+41.06 

104 

40.00 

40.06 

40.11 

40.17 

40.22 

40.28 

40.33 

40.39 

40.44 

40.50 

103 

39-44 

39-50 

39.56 

39.6i 

39.67 

39-72 

39.78 

39.83 

39.89 

39.94 

102 

38.89 

38.94 

39-oo 

39.06 

39-u 

39.17 

39.22 

39.28 

39-33 

39-39 

101 

38.33 

38.39 

38.44 

38.50 

38.56 

38.61 

38.67 

38.72 

38.78 

38.83 

+100 

+37-78 

+37.83 

+37.89 

+37-94 

+38.00 

+38.06 

+38.11 

+38.17 

+38.22 

+38.28 

99 

37.22 

37.28 

37-33 

37-39 

37-44 

37-50 

37.56 

37.61 

37.67 

37.72 

98 

36.67 

36.72 

36.78 

36.83 

36.89 

36.94 

37.00 

37.06 

37.ii 

37.17 

97 

36.11 

36.17 

36.22 

36.28 

36.33 

36.39 

36.44 

36.50 

36.56 

36.61 

96 

35-56 

35-6i 

35.67 

35.72 

35.78 

35.83 

35.89 

35-94 

36.00 

36.06 

+  95 

+35-00 

+35.o6 

+35.H 

+35-I7 

+35-22 

+35.28 

+35.33 

+35-39 

+35-44 

+35.50 

94 

34-44 

34.50 

34.56 

34.6i 

34.67 

34.72 

34.78 

34.83 

34.89 

34-94 

93 

33-89 

33-94 

34.00 

34-06 

34-n 

34.17 

34-22 

34.28 

34-33 

34-39 

92 

33-33 

33-39 

33-44 

33.50 

33.56 

33.6i 

33.67 

33.72 

33.78 

33.83 

32.78 

32.83 

32.89 

32.94 

33-00 

33.o6 

33.ii 

33.17 

33-22 

33-28 

+  90 

+32.22 

+32.28 

+32.33 

+32.39 

+32.44 

+32.50 

+32.56 

+32.61 

+32.67 

+32.72 

89 

31-67 

31.72 

3L78 

31-83 

31.89 

3L94 

32.00 

32.06 

32.11 

33-17 

88 

31.11 

3I-I7 

31.22 

31.28 

31-33 

3L39 

3L44 

3L50 

31-56 

31.61 

87 

30.56 

30.61 

30.67 

30.72 

30.78 

30.83 

30.89 

30.94 

31.00 

31.06 

86 

30.00 

30.06 

30.11 

30.17 

30.22 

30.28 

30.33 

30.39 

3°-44 

30.50 

+  85 

+29.44 

+29.50 

+29.56 

+29.61 

+29.67 

+29.72 

+29.78 

+29.83 

+29.89 

+29.94 

84 

28.89 

28.94 

29.00 

29.06 

29.11 

29.17 

29.22 

29.28 

29-33 

29-39 

«3 

28.33 

28.39 

28.44 

28.50 

28.56 

28.61 

28.67 

28.72 

28.78 

28.83 

82 

27.78 

27.83 

27.89 

27.94 

28.00 

28.06 

28.11 

28.17 

28.22 

28.28 

81 

27.22 

27.28 

27-33 

27-39 

27.44 

27.50 

27.56 

27.61 

27-67 

27.72 

+  80 

+26.67 

+26.72 

+26.78 

+26.83 

+26.89 

+26.94 

+27.00 

+27.06 

+27.11 

+27.17 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   2. 


FAHRENHEIT    SCALE    TO    CENTIGRADE. 


Fahren 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c.   i 

+80° 

+26?67 

+26?72 

+26?78 

+26?83 

+26?89 

+26?94 

+27?00 

+27?o6 

+27?!! 

+27*17  j 

79 

26.11 

26.17 

26.22 

26.28 

26.33 

26.39 

26.44 

26.50 

26.56 

26.61  ! 

78 

25-56 

25.61 

25.67 

25.72 

25.78 

25.83 

25.89 

25.94 

26.00 

26.06, 

77 

25-00 

25.06 

25-11 

25-17 

25.22 

25.28 

25.33 

25.39 

25.44 

25-50! 

76 

24.44 

24.50 

24.56 

24.61 

24.67 

24.72 

24.78 

24-83 

24.89 

24-94  : 

+75 

+23-89 

+23-94 

+24.00 

+24.06 

+24.11 

+24.17 

+24.22 

+24.28 

+24.33 

+24-39 

74 

23-33 

23.39 

23-44 

23-50 

23.56 

23.61 

23.67 

23.72 

23.78 

23-83 

73 

22.78 

22.83 

22.89 

22.94 

23.00 

23.06 

23.11 

23.17 

23.22 

23.28 

72 

22.22 

22.28 

22.33 

22.39 

22.44 

22.50 

22.56 

22.61 

22.67 

22.72 

7i 

21.67 

21.72 

21.78 

21.83 

21.89 

21.94 

22.00 

22.06 

22.11 

22.  ;7 

+70 

+21.  II 

+21.17 

+21.22 

+21.28 

+21.33 

+21.39 

+21.44 

+21.50 

+21.56 

+  21.61 

69 

20.56 

20.  6  1 

20.67 

20.72 

20.78 

20.83 

20.89 

20.94 

21.00 

21.06 

68 

20.00 

20.06 

20.11 

20.17 

20.22 

20.28 

20.33 

20.39 

20.44 

20.50 

67 

19.44 

19-50 

I9-56 

19.61 

19.67 

19.72 

19.78 

19-83 

19.89 

19.94 

66 

18.89 

18.94 

19.00 

19.06 

19.11 

19.17 

19.22 

19.28 

19-33 

J9-39 

+65 

+18.33 

+18.39 

+  18.44 

+18.50 

+  18.56 

+18.61 

+18.67 

+18.72 

+18.78 

+18.83 

64 

17.78 

17.83 

17.89 

17-94 

18.00 

18.06 

18.11 

18.17 

18.22 

18.28 

63 

17.22 

17.28 

^•M 

17-39 

17.44 

17.50 

17-56 

17.61 

17.67 

17.72  i 

62 

16.67 

16.72 

I6//8 

16.83 

16.89 

16.94 

17.00 

17.06 

17.11 

17.17 

61 

16.11 

16.17 

16.22 

16.28 

16.33 

16.39 

16.44 

16.50 

16.56 

16.61 

+60 

+15-56 

+15.61 

+15.67 

+I5-72 

+I5-78 

+15-83 

+15.89 

+15-94 

+I6.00 

+16.06 

59 

15.00 

15.06 

IS-" 

15.17 

15.22 

15.28 

15.33 

15.39 

15-44 

15.50 

58 

14.44 

14.50 

14.56 

14.61 

14.67 

14.72 

14.78 

14.83 

14-89 

14.94 

57 

13-89 

13.94 

14.00 

14.06 

14.11 

14.17 

14.22 

14.28 

14.33 

*4-39 

56 

13-33 

13.39 

J3.44 

13.50 

I3.56 

13.61 

13-67 

13.72 

13.78 

13-83 

+55 

+12.78 

+12.83 

+12.89 

+12.94 

+13.00 

+13-06 

+13-11 

+13.17 

+13.22 

-413.28 

54 

12.22 

12.28 

12.33 

12.39 

12.44 

12.50 

12.56 

12.61 

12.67 

12.72 

53 

11.67 

11.72 

11.78 

11.83 

11.89 

11.94 

I2.OO 

12.06 

12.11 

12.17 

52 

II.  II 

11.17 

11.22 

11.28 

H-33 

H.39 

11.44 

11.50 

11.56 

ii.  61 

51 

10.56 

10.  61 

10.67 

10.72 

10.78 

10.83 

10.89 

10.94 

11.00 

TI.06 

+50 

+10.00 

+10.06 

+IO.II 

+10.17 

+IO.22 

+10.28 

+  10-33 

+10.39 

+10.44 

+10.50 

49 

9-44 

9-50 

9.56 

9.61 

9.67 

9-72 

978 

9.83 

9.89 

9.94 

48 

8.89 

8.94 

9.OO 

9.06 

9.II 

9.17 

9.22 

9.28 

9-33 

9-39 

47 

8.33 

8.39 

8-44 

8.50 

8.56 

8.61 

8.67 

8.72 

8.78 

46 

7.78 

7.83 

7.89 

7.94 

8.00 

8.06 

8.  ii 

8.17 

8.22 

Q  oQ  • 

+45 

+  7-22 

+  7-28 

+  7-33 

+  7-39 

+  7-44 

+  7-50 

+  7.56 

+  7.6i 

+  7.67 

+  7-72 

44 

6.67 

6.72 

6.78 

6.83 

6.89 

6-94 

7.00 

7.06 

7.11 

7.17 

43 

6.ii 

6.17 

6.22 

6.28 

6.33 

6-39 

6.44 

6.50 

6.56 

6.61 

42 

5.56 

5.6i 

5.67 

5.72 

5.78 

5-83 

5-89 

5-94 

6.00 

6.06 

4i 

5.00 

5-o6 

5-II 

5-17 

5.22 

5.28 

5-33 

5-39 

544 

5.50 

+40 

+  4-44 

+  4-50 

+  4.56 

+  4.61 

+  4.67 

+  4.72 

+  4.78 

+  4.83 

+  4-89 

+  4-94 

39 

3-89 

3-94 

4-00 

4.06 

4.11 

4.17 

4.22 

4.28 

4-33 

4-39 

33 

3-33 

3-39 

3-44 

3-50 

3.56 

3-6i 

3-67 

3.72 

3-78 

37 

2.78 

2.83 

2.89 

2.94 

3.00 

3-o6 

3-H 

3.17 

3.22 

3*28 

36 

2.22 

2.28 

2.33 

2-39 

2.44 

2.50 

2.56 

2.61 

2.67 

2.72 

+35 

+    1.67 

+  1-72 

+  1-78 

+  1.83 

+  1.89 

+  1-94 

+  2.OO 

+  2.06 

+  2.II 

+  2.17 

34 

+   I.II 

+  1.17 

+    1.22 

+  1.28 

+  L33 

+  i-39 

+  1-44 

+  1.50 

+   1.56 

+  1.61 

33 

+  0.56 

+  0.61 

+  0.67 

+  0.72 

+  0.78 

+  0.83 

+  0.89 

+  0.94 

+    1.  00 

+  1.06 

32 

0.00 

+  0.06 

+  O.II 

+  0.17 

+   0.22 

+  0.28 

+  0.33 

+  0.39 

+  0.44 

+  0.50 

3i 

—  0.56 

—  0.50 

-  0.44 

-  0.39 

~   0.33 

—  0.28 

—  0.22 

-  0.17 

—  O.II 

—  0.06 

+30 

—  I.II 

-  1.06 

—    1.  00 

-  0.94 

—   0.89 

-  0.83 

—  0.78 

-  0.72 

—  0.67 

-  0.61 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

i 

SMITHSONIAN  TABLES. 


TABLE   2, 


FAHRENHEIT    SCALE    TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

C. 

c. 

c. 

c. 

c. 

c. 

c. 

+30° 

-  i?n 

-  i?o6 

-   I?00 

-  o?94 

-  o?89 

-  o?83 

-  o?78 

-0?72 

-  o?67 

-  o?6i 

29 

1.67 

1.61 

1.56 

1.50 

1.44 

1-39 

!-33 

1.28 

1.22 

1.17 

28 

2.22 

2.17 

2.  II 

2.06 

2.00 

1.94 

1.89 

1.83 

I.78 

1.72 

27 

2.78 

2.72 

2.67 

2.61 

2.56 

2.50 

2.44 

2.39 

2.28 

26 

3-33 

3.28 

3.22 

3.17 

3-II 

3-06 

3.00 

2.94 

2.89 

2.83 

+25 

-3.89 

-3-83 

-3.78 

-  3-72 

-3.67 

-3.61 

-3.56 

-  3.50 

-   3-44 

-  3-39 

24 

4.44 

4-39 

4-33 

4.28 

4.22 

4.17 

4.11 

4.06 

4.00 

3.94 

23 

5.00 

4-94 

4.89 

4-83 

4-78 

4-72 

4.67 

4.61 

4.56 

4.50 

22 

5.56 

5-50 

5-44 

5-39 

5-33 

5.28 

5-22 

5.17 

5-II 

5-06 

21 

6.ii 

6.06 

6.00 

5.94 

5.89 

5.83 

5-78 

5.72 

5.67 

5.6i 

+20 

-  6.67 

-  6.61 

-  6.56 

—  6.50 

-    6.44 

-  6.39 

-6.33 

-  6.28 

-   6.22 

-6.17 

19 

7.22 

7.17 

7.11 

7.06 

7.00 

6.94 

6.89 

6.83 

6.78 

6.72 

18 

7.78 

7.72 

7.67 

7.61 

7.56 

7.5o 

7-44 

7.39 

7.33 

7.28 

17 

8.33 

8.28 

8.22 

8.17 

8.ii 

8.06 

8.00 

7.,94 

7.89 

7.83 

16 

8.89 

8.83 

8.78 

8.72 

8.67 

8.61 

8.56 

8.50 

8.44 

8.39 

+  15 

-  9.44 

-  9-39 

—   9-33 

-  9.28 

-  9.22 

-  9-17 

-  9.11 

—  9.06 

—  9.00 

-  8.94 

14 

10.00 

9.94 

9.89 

9-83 

9.78 

9.72 

9-67 

9.61 

9.56 

9-50 

13 

10.56 

10.50 

10.44 

10.39 

10.33 

10.28 

10.22 

10.17 

10.  1  1 

10.06 

12 

II.  II 

ii.  06 

11.00 

10.94 

10.89 

10.83 

10.78 

10.72 

10.67 

10.61 

II 

11.67 

ii.  61 

11.56 

11.50 

11.44 

11-39 

H.33 

11.28 

11.22 

11.17 

+  10 

—12.22 

—12.17 

—  12.11 

—12.06 

—  12.  OO 

-11.94 

—11.89 

-11.83 

—11.78 

-11.72 

9 

12.78 

12.72 

12.67 

12.  6l 

12.56 

12.50 

12.44 

12.39 

12.33 

12.28 

8 

13.33 

13.28 

13.22 

13.1-7 

13.11 

13.06 

13.00 

12.94 

12.89 

12.83 

7 

J3-89 

13.83 

13.78 

13.7-5 

13.67 

13.61 

13.56 

13-50 

13-44 

13.39 

6 

14.44 

M.39 

H.33 

14.28 

14.22 

14.17 

14.11 

14.06 

14.00 

13.94 

+   5 

—15.00 

-14.94 

-14.89 

-14.83 

-14.78 

-14.72 

-14.67 

—14.61 

-14.56 

-14.50 

4 

15-56 

15-50 

15-44 

J5.39 

15-33 

15.28 

15.22 

15.17 

i5-ri 

15.06 

3 

i6.n 

16.06 

16.00 

15.94 

15.89 

15-83 

15.78 

15.72 

15-67 

15.61 

2 

16.67 

16.61 

16.56 

16.50 

16.44 

16.39 

16.33 

16.28 

16.22 

16.17 

I 

17.22 

17.17 

17.11 

17.06 

17.00 

16.94 

16.89 

16.83 

16.78 

16.72 

+  0 

17.78 

17.72 

17.67 

17.61 

17.56 

17.50 

17.44 

17-39 

17.33 

17.28 

-  0 

-17.78 

-17.83 

-17.89 

-17.94 

-18.00 

-18.06 

—  i8.ii 

—18.17 

—18.22 

-18.28 

I 

18.33 

18.39 

18.44 

18.50 

18.56 

18.61 

18.67 

18.72 

18.78 

18.83 

2 

18.89 

18.94 

19.00 

19.06 

19.11 

19.17 

19.22 

19.28 

i9'33 

19.39 

3 

19.44 

19-50 

I9-56 

19.61 

19.67 

19.72 

19.78 

19.83 

19.89 

19.94 

4 

20.00 

20.06 

'     20.  1  1 

20.17 

2O.22 

20.28 

20.33 

20.39 

20.44 

20.50 

-    5 

—20.56 

—20.61 

—20.67 

—20.72 

-20.78 

-20.83 

—20.89 

-20.94 

—21.00 

—21.06 

6 

21.  II 

21.17 

21.22 

21.28 

21-33 

21.39 

21.44 

21.50 

21.56 

21.  6l 

7 

21.67 

21.72 

21.78 

21.83 

21.89 

21.94 

22.00 

22.06 

22.11 

22.17 

8 

22.22 

22.28 

22.33 

22.39 

22.44 

22.50 

22.56 

22.61 

22.67 

22.72 

9 

22.78 

22.83 

22.89 

22.94 

23.00 

23.06 

23.11 

23.17 

23.22 

23.28 

-10 

-23.33 

-23-39 

-23.44 

-23.50 

-23.56 

—23.61 

-23.67 

-23.72 

-23.78 

-23.83 

ii 

23.89 

23-94 

24.00 

24.06 

24.11 

24.17 

24.22 

24.28 

24-33 

24.39 

12 

24.44 

24-50 

24.56 

24.61 

24.67 

24.72 

24.78 

24.83 

24.89 

24.94 

13 

25.00 

25.06 

25.11 

25-17 

25.22 

25.28 

25-33 

25.39 

25.44 

25.50 

H 

25.56 

25.61 

25.67 

25.72 

25.78 

25.83 

25.89 

25.94 

26.OO 

26.06 

-  15 

—26.11 

—26.17 

—26.22 

-26.28 

-26.33 

-26.39 

-26.44 

—26.50 

—26.56 

-26.61 

16 

26.67 

26.72 

26.78 

26.83 

26.89 

26.94 

27.00 

27.06 

27.11 

27.17 

17 

27.22 

27.28 

27.33 

27.39 

-27.44 

27.50 

27.56 

27.61 

27.67 

27.72 

18 

27.78 

27-83 

27.89 

27.94 

28.00 

28.06 

28.11 

28.17 

28.22 

28.28 

19 

28.33 

28.39 

28.44 

28.50 

28.56 

28.61 

28.67 

28.72 

28.78 

28.83 

-20 

-28.89 

-28.94 

—29.00 

—29.06 

—29.11 

-29.17 

—29.22 

—29.28 

-29.33 

-29-39 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   2. 


FAHRENHEIT    SCALE    TO    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

-20° 

-28?89 

-28?94 

—  29?00 

29?o6 

—29?  1  1 

—  2Q°I7 

-29?22 

-29?28 

-29?33 

-29°39 

21 

29.44 

29.50 

29.56 

29.61 

29.67 

29.72 

29.78 

29.83 

29.89 

29.94 

22 

30.00 

30.06 

30.11 

30.17 

30.22 

30.28 

30.33 

30.39 

30.44 

30.50 

23 

30.56 

30.61 

30.67 

30.72 

30.78 

30.83 

30.89 

30.94 

31.00 

31.06) 

24 

31.11 

3i.i7 

31.22 

31.28 

31-33 

3^-39 

31-44 

3J-5o 

31-56 

31.61 

-25 

-31.67 

-31.72 

-31.78 

-31.83 

31.89 

-  31-94 

—32.00 

—32.06 

-32.11 

-32.17 

26 

32.22 

32.28 

32.33 

32.39 

32.44 

32.50 

32.56 

32.61 

32.67 

32.72 

27 

32.78 

32.83 

32.89 

32.94 

33-00 

33-o6 

33.11 

33-17 

33-22 

33-28 

28 

33-33 

33.39 

33-44 

33.50 

33.56 

33-6i 

33.67 

33-72 

33.78 

33.83 

29 

33.89 

33-94 

34-00 

34.06 

34-11 

34.17 

34-22 

34-28 

34-33 

34-39 

-30 

-34-44 

-34-50 

-34.56 

-34.61 

-34.67 

-34.72 

-34.78 

-34.83 

-34.89 

-34-94 

31 

35-00 

35.o6 

35.ii 

35.17 

35-22 

35.28 

35-33 

35-39 

35-44 

35-50 

32 

35.56 

35-6i 

35.67 

35.72 

35.78 

35.83 

35.89 

35-94 

36.00 

36.06 

33 

36.11 

3,6.17 

36.22 

36.28 

36.33 

36.39 

36.44 

36.50 

36.56 

36.61 

34 

36.67 

36.72 

36.78 

36.83 

36.89 

36.94 

37-00 

37.06 

37-11 

37-17 

-35 

-37-22 

-37.28 

-37-33 

-37.39 

-37-44 

-37.50 

-37.56 

-37-6i 

-37.67 

-37.72 

36 

37.78 

37.83 

37.89 

37.94 

38.00 

38.06 

38.11 

38.17 

38.22 

38.28 

37 

38.33 

38.39 

38.44 

38.50 

38.56 

38.61 

38.67 

38.72 

38.78 

38.83 

38 

38.89 

38.94 

39.00 

39.06 

39-n 

39.17 

39-22 

39.28 

39.33 

39-39 

39 

39.44 

39.50 

39.56 

39.61 

39-67 

39.72 

39.78 

39.83 

39.89 

39.94 

-40 

—40.00 

—40.06 

—40.11 

-40.17 

—40.22 

—40.28 

-40.33 

-40.39 

-40.44 

-40.50 

4i 

40.56 

40.61 

40.67 

40.72 

40.78 

40.83 

40.89 

40.94 

41.00 

41.06 

42 

41.11 

4i.i7 

41.22 

41.28 

41-33 

41-39 

41.44 

41.50 

41.56 

41.61 

43 

41.67 

41.72 

41.78 

•  41.83 

41.89 

41.94 

42.00 

42.06 

42.11 

42.17 

44 

42.22 

42.28 

42.33 

42.39 

42.44 

42.50 

42.56 

42.61 

42.67 

42.72 

-45 

-42.78 

-42.83 

-42.89 

-42.94 

-43-00 

-43.06 

-43.11 

-43.17 

-43-22 

-43.28 

46 

43.33 

43-39 

43-44 

43.50 

43.56 

43.61 

43.67 

43-72 

43-78 

43.83 

47 

43.89 

43-94 

44.00 

44.06 

44.11 

44.17 

44.22 

44.28 

44-33 

44-39 

48 

4<t-44 

44.50 

44.56 

44.61 

44-67 

44-72 

44.78 

44.83 

44.89 

44-94 

49 

45.00 

45.o6 

45-11 

45.17 

45-22 

45-28 

45.33 

45.39 

45-44 

45.50 

-50 

-45.56 

-45.61 

-45.67 

-45.72 

-45.78 

-45.83 

-45.89 

-45-94 

—46.00 

—46.06 

5i 

46.11 

46.17 

46.22 

46.28 

46.33 

46.39 

46.44 

46.50 

46.56 

46.61 

52 

46.67 

46.72 

46.78 

46.83 

46.89 

46.94 

47-00 

47.06 

47.11 

47.17 

53 

47.22 

47.28 

47-33 

47.39 

47.44 

47-50 

47.56 

47.6i 

47.67 

47.72 

54 

47.78 

47.83 

47.89 

47.94 

48.00 

48.06 

48.11 

48.17 

48.22 

48.28 

-55 

-48.33 

-48.39 

-48.44 

-48.50 

-48.56 

—48.61 

-48.67 

-48.72 

-48.78 

-48.83 

56 

48.89 

48.94 

49.00 

49.06 

49.11 

49.17 

49.22 

49.28 

49-33 

49-39 

57 

49-44 

49-50 

49-56 

49.61 

49.67 

49.72 

49.78 

49.83 

49.89 

49-94 

58 

50.00 

50.06 

50.11 

50.17 

50.22 

50.28 

50.33 

50.39 

50.44 

50.50 

59 

50.56 

50.61 

50.67 

50.72 

50.78 

50.83 

50.89 

50.94 

51.00 

51.06 

-60 

-51-11 

-5i.i7 

-51.22 

-51.28 

-51.33 

-5L39 

-51-44 

-5L50 

-5L56 

—51.61 

6r 

51-67 

5L72 

5L78 

51.83 

51.89 

51-94 

52.00 

52.06 

52.11 

52.17 

6'2 

52.22 

52.28 

52.33 

52.39 

52.44 

52.50 

52.56 

52.61 

52.67 

52.72 

63 

52.78 

52.83 

52.89 

52.94 

53-00 

53-06 

53-n 

53.17 

53-22 

53.28 

64 

53-33 

53-39 

53.44 

53-50 

53-56 

53-61 

53-67 

53.72 

53.78 

53.83 

-65 

-53.89 

-53.94 

-54.00 

-54.06 

-54.11 

-54.17 

-54.22 

-54-28 

-54-33 

-54-39 

66 

54-44 

54-50 

54.56 

54.61 

54.67 

54-72 

54.78 

54.83 

54-89 

54-94 

67 

55-00 

55.o6 

55.ii 

55.17 

55-22 

55-28 

55-33 

55-39 

55-44 

55-50 

!      68 

55.56 

55-6i 

55.67 

55.72 

55.78 

55.83 

55.89 

55-94 

56.00 

56.06 

i    69 

56.11 

56.17 

56.22 

56.28 

56.33 

56.39 

56.44 

56.50 

56.56 

56.61 

-70 

-56.67 

-56.72 

-56.78 

-56.83 

-56.89 

-56.94 

-57-00 

-57.06 

-57-11 

-57-17 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   3. 


CENTIGRADE    SCALE    TO    FAHRENHEIT. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4- 

.5 

.6 

.7 

.8 

.9 

I 

F 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F.    ! 

+50° 

+I22?00 

+  I22?l8 

+I22?36 

+I22?54 

+I22?72 

f!22?90 

+I23?o8 

+123^26 

+I23?44 

+I23?62 

49 

120.20 

120.38 

120.56 

120.74 

I2O.92 

121.  10 

121.28 

121.46 

121.64 

121.82 

48 

II8.40 

118.58 

II8.76 

118.94 

119.12 

'    II9-30 

119.48 

119.66 

119.84 

1  20.02 

47 

116.60 

116.78 

116.96 

117.14 

117.32 

117.50 

117.68 

117.86 

118.04 

118.22 

46 

1  14.80 

114.98 

II5.I6 

115.34 

H5.52 

115.70 

115.88 

116.06 

116.24 

116.42 

+45 

+113.00 

+113.18 

+H3.36 

+113.54 

+113.72 

+113.90 

+114.08 

+114.26 

+114.44 

+114.62 

44 

III.  20 

IH.38 

111.56 

111.74 

111.92 

112.  10 

112.28 

112.46 

112.64 

112.82 

43 

109.40 

109.58 

109.76 

109.94 

IIO.I2 

110.30 

110.48 

110.66 

110.84 

1  1  1.  02 

42 

107.60 

107.78 

107.96 

108.  14 

108.32 

108.50 

108.68 

108.86 

109.04 

109.22 

4i 

105.80 

105.98 

106.16 

106.34 

106.52 

IO6.7O 

106.88 

107.06 

107.24 

107.42 

4-40 

+104.00 

+IO4.I8 

+104.36 

+104.54 

+104.72 

+104.90 

+105.08 

+105.26 

+105.44 

+105.62 

7Q 

102.20 

102.38 

102.56 

102.74 

IO2.92 

103.10 

103.28 

103.46 

103.64 

103.82 

38 

100.40 

100.58 

100.76 

100.94 

101.12 

101.30 

101.48 

101.66 

101.84 

102.02 

37 

98.60 

98.78 

98.96 

99.14 

99-32 

99-50 

99.68 

99.86 

100.04 

100.22 

36 

96.80 

96.98 

97.16 

97-34 

97.52 

97.70 

97.88 

98.06 

98.24 

98.42 

+35 

+  95-00 

+  95.18 

+  95.36 

+  95-54 

+  95.72 

+  95.90 

+  96.08 

+  96.26 

+  96.44 

+  96.62 

34 

93-20 

93.38 

93.56 

93-74 

93-92 

94.10 

94.28 

94.46 

94.64 

94.82' 

33 

91.40 

9L58 

91.76 

91.94 

92.12 

92.30 

92.48 

92.66 

92.84 

93.02! 

32 

89.60 

89.78 

89.96 

90.14 

90.32 

90.50 

90.68 

90.86 

91.04 

91.22 

3i 

87.80 

87.98 

88.16 

88.34 

88.52 

88.70 

88.88 

89.06 

89-24 

89.42 

+30 

+  86.00 

+  86.18 

+  86.36 

+  86.54 

+  86.72 

+  86.90 

+  87.08 

+  87.26 

+  87.44 

+  87.62 

29 

84.20 

84.38 

84-56 

84.74 

84.92 

85.10 

85.28 

85.46 

85.64 

85.82, 

28 

82.40 

82.58 

82.76 

82.94 

83.12 

83.30 

83.48 

83.66 

83.84 

84.02 

27 

80.60 

80.78 

80.96 

81.14 

81.32 

81.50 

81.68 

81.86 

82.04 

82.22' 

26 

78.80 

78.98 

79.16 

79-34 

79.52 

79.70 

79.88 

80.06 

80.24 

80.42 

+25 

+  77.00 

+77-18 

+  77.36 

+  77-54 

+  77-72 

+  77.90 

+  78.08 

+  78.26 

+  78.44 

-r-  78.62 

24 

75.20 

75.38 

75.56 

75-74 

75.92 

76.10 

76.28 

76.46 

76.64 

76.82 

23 

73-40 

73-58 

73.76 

73-94 

74.12 

74-30 

7448 

74.66 

74-84 

75.02 

22 

71.60 

71.78 

71.96 

72.14 

72.32 

72.50 

72.68 

72.86 

73-04 

73.22 

21 

69.80 

69.98 

70.16 

70.34 

70.52 

70.70 

70.88 

71.06 

71.24 

71.42 

+20 

+  68.00 

+  68.18 

+  68.36 

+  68.54 

+  68.72 

+  68.90 

+  69.08 

+  69.26 

+  69.44 

+  69.62 

19 

66.20 

66.38 

66.56 

66.74 

66.92 

67.10 

67.28 

67-46 

67.64 

67.82 

18 

64.40 

64-58 

64.76 

64.94 

65.12 

65.30 

65.48 

65.66 

65.84 

66.02 

17 

62.60 

62.78 

62.96 

63.14 

63.32 

63-50 

63.68 

63.86 

64.04 

64.22 

16 

60.80 

60.98 

61.16 

61.34 

61.52 

6l.7O 

61.88 

62.06 

62.24 

62.42; 

+  15 

+  59.00 

+59-18 

+  59-36 

+  59-54 

+  59-72 

+  59-9° 

+  60.08 

+  60.26 

+  60.44 

+  60.62 

14 

57.20 

57.38 

57.56 

57-74 

57.92 

58.10 

58.28 

58.46 

58.64 

58.82 

13 

55-40 

55.58 

55.76 

55-94 

56.12 

56.30 

56.48 

56.66 

56.84 

57-02 

12 

53-6o 

53-78 

53.96 

54-14 

54.32 

54-50 

54-68 

54.86 

55-04 

55-22 

II 

51.80 

5L98 

52.16 

52.34 

52.52 

52.70 

52.88 

53.o6 

53-24 

53-42 

+  10 

+  50.00 

+  50.18 

+  50.36 

+  50.54 

+  50.72 

+  50.90 

+  51-08 

+  51-26 

+  5L44 

+  51.62 

9 

48.20 

48.38 

48.56 

48.74 

48.92 

49.10 

49.28 

49.46 

49.64 

49.82 

8 

46.40 

46.58 

46.76 

46.94 

47.12 

47.30 

47-48 

47-66 

47.84 

48.02; 

7 

44.60 

44.78 

44.96 

45.M 

45-32 

45-50 

45-68 

45-86 

46.04 

46.22 

6 

42.80 

42.98 

43.16 

43-34 

43-52 

43-70 

43-88 

44.06 

44-24 

44.42 

+  5 

+  41.00 

+  4LI8 

+  41.36 

+  4L54 

+  41.72 

+  41.90 

+  42.08 

+  42.26 

+  42.44 

+  42.62 

4 

39-20 

39.38 

39.56 

39-74 

39.92 

40.10 

40.28 

40.46 

40.64 

40.82 

3 

37-40 

37.58 

37.76 

37-94 

38.12 

38.30 

38.48 

38.66 

38.84 

39-02 

2 

35-60 

35.78 

35.96 

36.14 

36.32 

36.50 

36.68 

36.86 

37.04 

37-22 

I 

33.8o 

33.98 

34.16 

34-34 

34.52 

34.70 

34-88 

35.o6 

35-24 

35-42, 

+  0 

+  32.00 

+  32.18 

+  32.36 

+  32.54 

+  32.72 

+  32.90 

+  33-08 

+  33-26 

+  33-44 

+  33-62! 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   3. 


CENTIGRADE    SCALE    TO    FAHRENHEIT. 


Centi- 
grade. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

-0° 

+32?oo 

+3i°82 

+3I°64 

+3i°46 

+3i°28 

+3i?io 

+30?92 

+3Q?74 

+30?56 

+30?38 

i 

30.20 

30.02 

29.84 

29.66 

29.48 

29.30 

29.12 

28.94 

28.76 

28.58; 

2 

28.40 

28.22 

28.04 

27.86 

27.68 

27.50 

27.32 

27.14 

26.96 

26.78 

3 

26.60 

26.42 

26.24 

26.06 

25.88 

25.70 

25-52 

25-34 

25.16 

24.98 

4 

24.80 

24.62 

24.44 

24.26 

24.08 

23.90 

23.72 

23.54 

23-36 

23.18 

-  5 

+23.00 

+22.82 

+22.64 

+22.46 

+22.28 

+22.10 

+21.92 

+21.74 

+21.56 

+21.38 

6 

21.  2O 

2  1.  02 

20.84 

20.66 

20.48 

20.30 

20.  1  2 

19.94 

19.76 

I9-58 

7 

19.40 

T9.22 

19.04 

18.86 

18.68 

18.50 

18.32 

18.14 

17.96 

17.78 

8 

I7.60 

17.42 

17.24 

17.06 

1  6.  88 

16.70 

16.52 

16.34 

16.16 

15-98! 

9 

15.80 

15.62 

15-44 

15.26 

15.08 

14.90 

14.72 

H-54 

14.36 

14.18 

-10 

+14.00 

+13.82 

+13.64 

+13-46 

+13.28 

+13.10 

+12.92 

+12.74 

+12.56 

+12.38 

ii 

1  2.  2O 

12.  02 

11.84 

11.66 

11.48 

II.3O 

II.  12 

10.94 

10.76 

10.58 

12 

10.40 

10.22 

10.04 

9.86 

9.68 

9-50 

9-32 

9.14 

8.96 

8.78 

13 

8.60 

8.42 

8.24 

8.06 

7.88 

7.70 

7.52 

7-34 

7.16 

6.98 

H 

6.80 

6.62 

6.44 

6.26 

6.08 

5.90 

5-72 

5-54 

5.36 

5.i8 

-15 

+   5-00 

+  4.82 

+  4-64 

+  4.46 

+  4.28 

+  4.10 

+   3-92 

+  3-74 

+  3.56 

+  3.38 

16 

+   3.20 

+  3«°2 

+  2.84 

+  2.66 

+  2.48 

+  2.30 

+   2.12 

+  1-94 

+  1.76 

+  1-58 

17 

+    L40 

+    1.22 

+   1.04 

+  0.86 

+  0.68 

+  0.50 

+  0.32 

+  0.14 

—  0.04 

—   0.22 

18 

—  O.4O 

-  0.58 

—  0.76 

—  0.94 

—    1.  12 

-   L30 

-    1.48 

-  1.66 

-  1.84 

—    2.02 

19 

—   2.20 

-    2.38 

-2.56 

-  2.74 

-  2.92 

-  3-10 

-3.28 

-  346 

-3.64 

-3-82 

-20 

—   4.00 

-   4.18 

-  4.36 

-  4-54 

-  4.72 

-  4.90 

-   5.08 

-5-26 

-  5-44 

-    5-62 

21 

5-80 

5.98 

6.16 

6-34 

6.52 

6.70 

6.88 

7.06 

7-24 

7.42 

22 

7.60 

7.78 

7.96 

8.14 

8.32 

8.50 

8.68 

8.86 

9.04 

9-22 

23 

940 

9.58 

9.76 

9-94 

10.12 

10.30 

10.48 

10.66 

10.84 

II.  O2  I 

24 

1  1.  2O 

11.38 

11.56 

11.74 

11.92 

12.10 

12.28 

12.46 

12.64 

I2.82; 

-25 

-13.00 

-I3.I8 

-13.36 

-13-54 

-13.72 

-13.90 

—14.08 

—14.26 

—14.44 

-14.62 

26 

14.80 

14.98 

I5.I6 

15.34 

15.52 

15.70 

15-88 

16.06 

16.24 

16.42  1 

27 

16.60 

16.78 

16.96 

17.14 

17.32 

17.50 

17.68 

17.86 

18.04 

lS.22 

28 

18.40 

18.58 

18.76 

18.94 

19.12 

19.30 

19.48 

19.66 

19.84 

2O.O2 

29 

20.20 

20.38 

20.56 

20.74 

20.92 

21.10 

21.28 

21.46 

21.64 

21.82 

-30 

—22.00 

—22.18 

—22.36 

-22.54 

—22.72 

—22.90 

-23.08 

-23.26 

-23-44 

—23.62 

3i 

23.80 

23.98 

24.16 

24-34 

24.52 

24.70 

24.88 

25.06 

25.24 

25.42 

32 

25.60 

25.78 

25.96 

26.14 

26.32 

26.50 

26.68 

26.86 

27.04 

27.22 

33 

27.40 

27.58 

27.76 

27.94 

28.12 

28.30 

28.48 

28.66 

28.84 

29.O2 

34 

29.20 

29.38 

29.56 

29.74 

29.92 

30.10 

30.28 

30.46 

30.64 

30.82 

-35 

—31.00 

-3I.I8 

-3L36 

-3I-54 

-31.72 

-31.90 

-32.08 

-32.26 

-32.44 

-32.62  | 

36 

32.80 

32.98 

33-16 

33-34 

33.52 

33.70 

33-88 

34.o6 

34.24 

3442  i 

37 

34.60 

34-78 

34.96 

35.14 

35.32 

35-50 

35-68 

35-86 

36.04 

36.22  j 

38 

36.40 

36.58 

36.76 

36.94 

37.12 

37.30 

37.48 

37-66 

37.84 

38.02 

39 

38.20 

38.38 

38.56 

38.74 

38.92 

39.10 

39.28 

39.46 

39.64 

39-82 

-40 

—4O.OO 

—40.l8 

—40.36 

-40.54 

—40.72 

-40.90 

-41.08 

—41.26 

-41.44 

—41.62 

4i 

41.80 

41.98 

42.l6 

42.34 

42.52 

42.70 

42.88 

43-06 

43-24 

4342 

42 

43.60 

43-78 

43-96 

44.14 

44.32 

44.50 

44.68 

44.86 

45-04 

45.22 

43 

45-40 

45.58 

45.76 

45-94 

46.12 

46.30 

46.48 

46.66 

46.84 

47.02 

44 

47.20 

47.38 

47.56 

47-74 

47.92 

48.IO 

48.28 

48.46 

48.64 

48.82 

-45 

—49.00 

-49.18 

-49.36 

-49-54 

-49.72 

-49.90 

—50.08 

—50.26 

-50.44 

—50.62 

46 

50.80 

50.98 

5I.I6 

51-34 

51-52 

Sr-70 

51-88 

52.06 

52.24 

52.42 

47 

52.60 

52.78 

52.96 

53-14 

53-32 

53-50 

53-68 

53-86 

54-04 

54-22 

48 

5440 

54.58 

54.76 

54-94 

55-12 

55-30 

55-48 

55-66 

55-84 

56.02 

49 

56.20 

56.38 

56.56 

56.74 

56.92 

57-iQ 

57.28 

57.46 

57.64 

57.82 

-50 

—58.00 

-58.18 

-58.36 

-58.54 

-58.72 

-58.90 

-59-oS 

-59.26 

-59-44 

-59.62 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

SMITHSONIAN  TABLES. 


TABLE   4. 
CENTIGRADE    SCALE    TO    FAHRENHEIT- Near  the   Boiling    Point. 


Centi- 
grade. 

.O 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

100° 

2I2?00 

2I2?l8 

2I2?36 

2I2?54 

2I2?72 

2I2?90 

2I3?08 

2I3?26 

2i3?44 

2I3?62 

99 

2IO.2O 

210.38 

210.56 

210.74 

210.92 

211.  IO 

211.28 

211.46 

211.64 

211.82 

98 

208.40 

208.58 

208.76 

208.94 

2O9.I2 

209.30 

209.48 

209.66 

209.84 

210.02 

97 

206.60 

206.78 

206.96 

207.14 

207.32 

207.50 

207.68 

207.86 

208.04 

208.22 

96 

204.80 

204.98 

205.16 

205.34 

205.52 

205.70 

205.88 

206.06 

206.24 

206.42 

95 

203.00 

203.18 

203.36 

203.54 

203.72 

203.90 

204.08 

204.26 

204.44 

2O4.62 

94 

2OI.2O 

201.38 

201.56 

201.74 

201.92 

202.10 

202.28 

202.46 

202.64 

202.82 

93 

199.40 

199-58 

199.76 

199.94 

200.12 

200.30 

200.48 

200.66 

200.84 

201.02 

92 

197.60 

197.78 

197.96 

198.14 

198.32 

198.50 

198.68 

198.86 

199.04 

199.22 

9i 

195.80 

I95-98 

196.16 

196.34 

196.52 

196.70 

196.88 

197.06 

197.24 

197.42 

90 

I94.OO 

194.18 

194.36 

194.54 

194.72 

194.90 

195.08 

195-26 

195-44 

195.62 

TABLE    5. 
DIFFERENCES    FAHRENHEIT   TO    DIFFERENCES    CENTIGRADE. 


Fahren- 
heit. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

0° 

0?00 

o?o6 

0?II 

o?i7 

0?22 

0?28 

o*33 

°'39 

o?44 

o?5o 

i 

0.56 

0.61 

0.67 

0.72 

0.78 

0.83 

0.89 

0.94 

I.OO 

i!o6 

2 

I.  II 

1.17 

1.22 

1.28 

1.33 

1.39 

i-44 

1.50 

1.56 

1.61 

3 

1.67 

1.72 

1.78 

1.83 

1.89 

1.94 

2.00 

2.06 

2.II 

2.17 

4 

2.22 

2.28 

2-33 

2.39 

2-44 

2.50 

2.56 

2.61 

2.67 

2.72 

5 

2.78 

2-83 

2.89 

2-94 

3-00 

3.06 

3." 

3-17 

3-22 

3.28 

6 

3-33 

3-39 

3-44 

3.50 

3-56 

3.61 

3.67 

3-72 

3-78 

3-83 

7 

3-89 

3-94 

4.00 

4.06 

4.II 

4.17 

4.22 

4.28 

4-39 

8 

4.44 

4-50 

4.56 

4.61 

4.67 

4.72 

4.78 

4-83 

4.89 

4-94 

9 

5.00 

5.06 

5-" 

5-17 

5.22 

5.28 

5-33 

5-39 

5-44 

5-50 

10 

5-56 

561 

5-67 

5.72 

5.78 

5.83 

5.89 

5-94 

6.00 

6.06 

ii 

6.11 

6.17 

6.22 

6.28 

6-33 

6.39 

6.44 

6.50 

6.56 

6.61 

12 

6.67 

6.72 

6.78 

6.83 

6.89 

6.94 

7.00 

7.06 

7.11 

7.17 

13 

7.22 

7.28 

7-33 

7-39 

7.44 

7.50 

7.56 

7.61 

7.67 

7-72 

14 

7.78 

7.83 

7.89 

7-94 

8.00 

8.06 

8.ii 

8.17 

8.22 

8.28 

15 

8.33 

8.39 

8.44 

8.50 

8.56 

8.61 

8.67 

8.72 

8.78 

8.83 

16 

8.89 

8.94 

9-00 

9.06 

9.11 

9.17 

9.22 

9.28 

9-33 

9-39 

17 

9-44 

9-50 

9.56 

9.61 

9.67 

9.72 

9.78 

9-83 

9-89 

9-94 

18 

10.00 

10.06 

10.  1  1 

10.17 

10.22 

10.28 

10.33 

10.39 

10.44 

10.50 

19 

10.56 

10.61 

10.67 

10.72 

10.78 

10.83 

10.89 

10.94 

11.00 

1  1.  06 

20 

n.ii 

11.17 

11.22 

11.28 

11-33 

"•39 

11.44 

11.50 

11.56 

ii.  61 

TABLE   e. 
DIFFERENCES    CENTIGRADE   TO    DIFFERENCES    FAHRENHEIT. 


I    Centi- 
:  grade. 

.0 

.1 

.2 

•3 

.4 

.5 

.6 

.7 

.8 

.9 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

F. 

0° 

0?00 

o?i8 

o?36 

o?54 

0?72 

ofgo 

i?o8 

I?26 

i?44 

I?62 

i 

1.80 

1.98 

2.16 

2-34 

2.52 

2.70 

2.88 

3.06 

3-24 

3-42 

2 

3-6o 

3.78 

3-96 

4.14 

4-32 

4-50 

4.68 

4.86 

5-04 

5.22 

3 

5-40 

5-58 

5.76 

5-94 

6.12 

6.30 

6.48 

6.66 

6.84 

7.02 

4 

7.20 

7-38 

7-56 

7-74 

7.92 

8.10 

8.28 

8.46 

8.64 

8.82 

5 

9.00 

9.18 

9-36 

9-54 

9.72 

9.90 

10.08 

10.26 

10.44 

10.62 

6 

10.80 

10.98 

ii.  16 

ii-34 

11.52 

11.70 

11.88 

12.06 

12.24 

12.42 

7 

12.60 

12.78 

12.96 

13-14 

13-32 

I3-50 

13-68 

13.86 

14.04 

14.22 

8 

14.40 

14.58 

14.76 

14.94 

15.12 

15-30 

15.48 

15.66 

15.84 

16.02 

9 

16.20 

16.38 

16.56 

16.74 

16.92 

17.10 

17.28 

17.46 

17.64 

17.82 

SMITHCONIAN 


TABLE  7. 


REDUCTION    OF  TEMPERATURE    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 


Rate  of 

DIFFERENCES  BETWEEN  TEE  TEMPERATURE  AT  ANY  ALTITUDE 

decrease 

AND   AT  SEA   LEVEL. 

of 

i 

ature. 

ALTITUDE  IN  FEET. 

for 

every 

100 

200 

300 

400 

500 

600 

700 

800 

900 

lOOOi  2000 

3000 

4000 

5000 

Feet 

F 

F 

F 

F. 

F. 

F. 

F. 

F. 

F 

F.            F. 

F 

F 

F.  ! 

200 

o?5o 

I?00 

2?00 

3?oo 

4?oo 

5?oo    io?oo 

I5?00 

20?00 

25?00 

205 

0.49 

0.98 

1.46 

i-95 

2-44 

2-93 

3-41 

3-90 

4-39 

4.88      9.76 

14.63 

19.51 

24-39 

210 

0.48 

o-95 

i-43 

1.90 

2.38 

2.86 

3-33 

3-Si 

4.29 

4.76      9.52 

14.29 

19.05 

23.81' 

215 

0.47 

0-93 

1.40 

1.86 

2-33 

2-79 

3-26 

3-72 

4.19 

4-65  j    9-30 

13-95 

1  8.  60 

23.26 

220 

0-45 

0.91 

1.36 

1.82 

2.27 

2-73 

3-18 

3-64 

4.09 

4-55  !    9-09 

13.63 

18.18 

22.72 

230 

0-43 

0.87 

1.30 

1.74 

2.17 

2.61 

3-04 

3.48 

3-91 

4-35 

8.70 

13.04 

17-39 

21.74: 

240 

0.42 

0.83 

1.25 

1.67 

2.08 

2.50 

2.92 

3-33 

3-75 

4.17 

8.33 

12.50 

16.67 

20.83 

250 

0.40 

0.80 

1.20 

1.60 

2.00 

2.40 

2.80 

3-20 

3.60 

4.00 

8.00 

12.00 

16.00 

20.00 

260 

0.38 

0.77 

I-I5 

1.54 

1.92 

2.31 

2.69 

3.08 

3.46 

3-85 

7.69 

n-54 

15-38 

19-23; 

270 

0-37 

0.74 

I.  II 

1.48 

1.85 

2.22 

2-59 

2.96 

3-33 

3-70 

7.41 

ii.  ii 

14.81 

18.52 

280 

0.36 

0.71 

1.07 

1-43 

1.79 

2.14 

2.50 

2.86 

3-21 

3-57 

7.14 

10.71 

14.29 

17.86 

290 

0-34 

0.69 

1.03 

1.38 

1.73 

2.07 

2.41 

2.76 

3.10 

3-45 

6.90 

10.34 

13.79 

17.24 

300 

0-33 

0.67 

I.OO 

i-33 

1.67 

2.OO 

2-33 

2.67 

3.00 

3-33 

6.67 

10.00 

13-33 

16.67 

310 

0.32 

0.65 

0.97 

1.29 

1.61 

1.94 

2.26 

2.58 

2.90 

3-23 

6-45 

9.68 

12.90 

16.13! 

320 

0.31 

0.62 

0.94 

1.25 

1-56 

1.87 

2.19 

2.50 

2.81 

3-12 

6.25 

9-37 

12.50 

15.62 

340 

0.29 

0-59 

0.88 

1.18 

1.47 

1.76 

2.06 

2-35 

2.65 

2.94 

5-88 

8.82 

11.76 

14.71! 

360 

0.28 

0.56 

0.83 

i.  ii 

1.39 

1.67 

1.94 

2.22 

2.50 

2.78 

5-56 

8-33 

ii.  ii 

13-89 

380 

0.26 

0-53 

0-79 

1.05 

1.32 

1.58 

1.84 

2.IO 

2-37 

2.63 

5-26 

7.89 

10.53 

13.16! 

400 

0.25 

0.50 

0-75 

I.OO 

1.25 

1.50 

1-75 

2.00 

2.25 

2.50 

5-00 

7.50 

10.00 

12.50 

420 

0.24 

0.48 

0.71 

0-95 

1.19 

1-43 

1.67 

I.9O 

2.14 

2.38 

4-76 

7.14 

9.52 

11.90' 

440 

0.23 

0-45 

0.68 

0.91 

1.14 

1.36 

r.59 

1.82 

2.05 

2.27 

4-55 

6.82 

9.09 

11.361 

460 

O.22 

0-43 

0.65 

0.87 

1.09 

1.30 

1-52 

1.74 

1.96 

2.17 

4-35 

6.52 

8.70 

10.87; 

480 

0.21 

0.42 

0.62 

0.83 

1.04 

1-25 

1.46 

1.67 

1.87 

2.08 

4.17 

6.25 

8.33 

10.42' 

500 

O.2O 

0.40 

0.60 

0.80 

I.OO 

1.20 

1.40 

1.60 

1.80 

2.OO 

4.00 

6.00 

8.00 

I0.001 

520 

0.19 

0.38 

0.58 

o-77 

0.96 

I-I5 

1-35 

1-54 

1-73 

1.92 

3-85 

5-77 

7.69 

9.62' 

540 

0.19 

0-37 

0.56 

0.74 

0.93 

I.  II 

1.30 

1.48 

1.67 

1.85 

3.70 

5.56 

7.41 

9.26 

560 

0.18 

0.36 

0-54 

0.71 

0.89 

1.07 

1-25 

1-43 

1.61 

1.79 

3-57 

5.36 

7.14 

8.93i 

580 

0.17 

0-34 

0.52 

0.69 

0.86 

1.03 

1.  21 

1.38 

1-55 

1.72 

3-45 

5.17 

6.90 

8.62: 

600 

0.17 

o-33 

0.50 

0.67 

0.83 

I.OO 

I.I7 

1-33 

1.50 

1.67 

3-33 

5.00 

6.67 

8-33 

620 

0.16 

0.32 

0.48 

0.65 

0.81 

0.97 

I.I3 

1.29 

1-45 

1.61 

3.23 

4.84 

6-45 

8.06 

650 

0.15 

0.31 

0.46 

0.62 

o.77 

0.92 

1.08 

1.23 

1.38 

1-54 

3.08 

4.62 

6.15 

7.69 

700 

0.14 

0.29 

0-43 

0.57 

0.71 

0.86 

I.OO 

1.14 

1.29 

1-43 

2.86 

4.29 

5.7i 

7-14 

750 

0.13 

0.27 

0.40 

0-53 

0.67 

0.80 

0.93 

1.07 

1.20 

1.33 

2.67 

4.00 

5-33 

6.67 

800 

0.12 

0.25 

o.37 

0.50 

0.62 

o.75 

0.87 

I.OO 

1.  12 

1.25 

2.50 

3-75 

5-00 

6.25 

850 

0.  12 

0.24 

0-35 

0.47 

0-59 

0.71 

0.82 

0.94 

1.06 

1.18 

2-35 

3-53 

4.7i 

5.88 

900 

O.II 

0.22 

o-33 

0.44 

0.56 

0.67 

0.78 

0.89 

I.OO 

i.n 

2.22 

3-33 

4-44 

5.56 

Tabular  values  are  to  be  added  to  the  observed  temperature  to  obtain 

the  temperature  at  sea  level. 

SMITHSONIAN  TABLES. 


10 


TABLE   8 


REDUCTION    OF   TEMPERATURE    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Rate  of 

DIFFERENCES  BETWEEN  THE  TEMPERATURE  AT  ANY  AI/TITUDE 

decrease 
of 

AND  AT  SEA  I,EVEI,. 

ature. 

ALTITUDE  IN   METRES. 

for' 

every 

100 

200 

300 

400 

500 

600 

700 

800 

900 

1000 

2000 

3000 

m. 

C. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

100 

I?00 

2?00 

3?oo 

4?oo 

5?oo 

6?oo 

7?oo 

8?oo 

9?oo 

I0?00 

20?00 

30?oo 

IO2 

0.98 

!.96 

2.94 

3-92 

4.90 

5-88 

6.86 

7.84 

8.82 

9.80 

I9.6l 

29.41 

104 

0.96 

1.92 

2.88 

3-85 

4.8! 

5-77 

6.73 

7.69 

8.65 

9.62 

19.23 

28.85 

106 

0.94 

1.89 

2.83 

3-77 

4.72 

5-66 

6.60 

7-55 

8.49 

9-43 

18.87 

28.30 

108 

0.93 

1.85 

2.78 

3-70 

4-63 

5.56 

6.48 

7.41 

8-33 

9.26 

18.52 

27.78 

no 

0.91 

1.82 

2.73 

3-64 

4-55 

5-45 

6.36 

7.27 

8.18 

9.09 

18.18 

27.27 

115 

0.87 

1.74 

2.61 

3.48 

4-35 

5.22 

6.09 

6.96 

7.83 

8.70 

17-39 

26.09 

120 

0.83 

1.67 

2.50 

3-33 

4.17 

S.oo 

5.83 

6.67 

7.50 

8.33 

16.67 

25.00 

125 

0.80 

1.60 

2.40 

3-20 

4.00 

4.80 

5-60 

6.40 

7.20 

8.00 

16.00 

24.00 

I30 

0.77 

1-54 

2.31 

3.08 

3-85 

4.62 

5.38 

6.15 

6.92 

7.69 

15.38 

23.08 

135 

0.74 

1.48 

2.22 

2.96 

3-70 

4-44 

5.19 

5.93 

6.66 

7.41 

14.81 

22.22 

140 

0.71 

1-43 

2.14 

2.86 

3-57 

4.29 

5.00 

5.71 

6-43 

7.14 

14.29 

21-43 

145 

0.69 

1.38 

2.07 

2.76 

3-45 

4.14 

4.83 

5.52 

6.21 

6.90 

13-79 

20.69 

150 

0.67 

1-33 

2.00 

2.67 

3-33 

4.00 

4.67 

5-33 

6.00 

6.67 

13.33 

20.00 

155 

0.65 

1.29 

1.94 

2.58 

3.23 

3.87 

4-52 

5-i6 

5.8i 

6-45 

12,90 

I9.35  '' 

160 

0.62 

1.25 

1.87 

2.50 

3-12 

3-75 

4.37 

5-00 

5-62 

6.25 

12.50 

18.75  ! 

170 

0.59 

1.18 

I.76 

2-35 

2.94 

3.53 

4.12 

4.70 

5.29 

5-88 

11.76 

17.65 

180 

0.56 

i.  ii 

1.67 

2.22 

2.78 

3-33 

3-89 

4-44 

5.00 

5.56 

ii.  ii 

16.67 

190 

0.53 

1.05 

1.58 

2.10 

2.63 

3.16 

3-68 

4.21 

4-74 

5-26 

10.53 

15-79  : 

200 

0.50 

1.  00 

1.50 

2.00 

2.50 

3.00 

3.50 

4.00 

4-50 

5-00 

IO.OO 

15.00 

210 

0.48 

0-95 

1-43 

I.90 

2.38 

2.86 

3-33 

3-8i 

4.29 

4.76 

9-52 

14.29 

220 

0.45 

0.91 

1.36 

1.82 

2.27 

•2.73 

3.18 

3.64 

4.09 

4-55 

9.09 

13.64 

230 

0.43 

0.87 

1.30 

1-74 

2.17 

2.61 

3.04 

3.48 

3.91 

4-35 

8.70 

13.04 

240 

0.42 

0.83 

1.25 

1.67 

2.08 

2.50 

2.92 

3-33 

3.75 

4.17 

8.33 

12.50 

250 

0.40 

0.80 

1.20 

1.60 

2.00 

2.40 

2.80 

3.20 

3.60 

4.00 

8.00 

12.00 

260 

0.38 

0.77 

I.I5 

1-54 

1.92 

2.31 

2.69 

3-08 

346 

3.85 

7.69 

"•54: 

270 

0.37 

0.74 

I.  II 

1.48 

1.85 

2.22 

2.59 

2.96 

3-33 

3-70 

7.41 

ii.  ii 

280 

0.36 

0.71 

1.07 

1-43 

1.79 

2.14 

2.50 

2.86 

3.21 

3-57 

7.14 

10.71 

290 

0.34 

0.69 

1.03 

1.38 

1.72 

2.07 

2.41 

2.76 

3.10 

3-45 

6.90 

10.34 

300 

0.33 

0.67 

1.  00 

1-33 

1.67 

2.00 

2.33 

2.67 

3.00 

3-33 

6.67 

10.00 

320 

0.31 

0.62 

0.94 

•25 

1.56 

1.87 

2.19 

2.50 

2.81 

3-12 

6-25 

9-37 

340 

0.29 

0.59 

0.88 

.18 

1.47 

I.76 

2.06 

2-35 

2.65 

2.94 

5-88 

8.82 

360 

0.28 

0.56 

0.83 

.11 

1-39 

1.67 

1.94 

2.22 

2.50 

2.78 

5.56 

8-33 

380 

0.26 

0.53 

0.79 

•05 

1.32 

1.58 

1.84 

2.10 

2.37 

2.63 

5-26 

7.89 

400 

0.25 

0.50 

0-75 

.00 

1.25 

1.50 

1-75 

2.00 

2.25 

2.50 

5-oo 

7-50 

420 

0.24 

0.48 

0.71 

0-95 

I.I9 

1-43 

1.67 

1.90 

2.14 

2.38 

4.76 

7.14 

440 

0.23 

0.45 

0.68 

0.91 

1.14 

1.36 

.1-59 

1.82 

2.05 

2.27 

4.55 

6.82 

460 

0.22 

0.43 

0.65 

0.87 

1.09 

1.30 

1.52 

1.74 

1.96 

2.17 

4-35 

6.52 

480 

O.2I 

0.42 

0.62 

0.83 

1.04 

1.25 

1.46 

1.67 

1.87 

2.08 

4.17 

6.25 

500 

O.2O 

0.40 

0.60 

0.80 

1.  00 

1.20 

1.40 

1.60 

1.80 

2.OO 

4.00 

6.00 

Tabular  values  are  to  be  added  to  the  observed  temperature  to  obtain 

the  temperature  at  sea  level. 

SMITHSONIAN  TABLES. 


II 


TABLE  9. 

CORRECTION    FOR  THE   TEMPERATURE   OF   THE    THERMOMETER 

STEM. 

Z1—  t  —  0.0000795  n  (tf  —  t]  —  Fahrenheit  temperatures. 
T—t  —  0.000143  n  (tf —  t}  —  Centigrade  temperatures. 
7"—  Corrected  temperature. 
t  =  Observed  temperature. 

tf  =  Mean  temperature  of  the  glass  stem  and  mercury  column. 
n  -=  Length  of  mercury  in  the  stem  in  scale  degrees. 


CORRECTION  FOR  FAHRENHEIT  THERMOMETERS. 
Values  of  0.0000795    n  (t'  —t} 


t'  —  t 

1 
10°         2O° 

30° 

4O°         50° 

60°         7O° 

8O° 

9O° 

1OO° 

i 

F. 

F. 

F. 

F. 

F. 

F.                 F.               F. 

F. 

F. 

F. 

10° 

0?OI 

0?02 

0?02 

o?o3 

0?04 

o?os 

o?o6 

o?o6 

o?o7 

o?o8 

20 

0.02 

0.03 

0.05 

0.06 

O.o8 

0.  10 

O.  II 

0.13        0.14 

o.  16 

30 

O.O2 

0.05 

0.07 

0.  10 

0.12 

0.14 

0.17 

0.19 

0.21 

0.24 

40 

0.03 

0.06 

0.10 

0.13 

o.  16 

0.19 

0.22 

0.25 

0.29 

0.32   i 

50 

0.04 

0.08 

0.12 

0.16 

0.20 

0.24 

0.28 

0.32 

0.36 

0.40 

60 

0.05 

0.  10 

0.14 

0.19 

0.24 

0.29 

o-33 

0.38 

0.43 

0.48 

70 

0.06 

0.  II 

0.17 

0.22 

0.28 

0-33 

0-39 

0-45 

0.50 

0.56   \ 

80 

0.06 

0.13 

0.19 

0.25 

0.32 

0.38 

o.45 

0.51 

0.57 

0.64 

90 

0.07 

0.14 

0.21 

0.29 

0.36 

0-43 

0.50 

o.57 

0.64 

0.72 

100 

0.08 

0.16  ' 

0.24 

0.32 

0.40 

0.48 

0.56 

0.64 

0.72 

0-79 

110 

0.09 

0.17 

0.26 

0-35 

0.44 

0.52 

0.61 

0.70 

0.79 

0.87 

1  20 

0.10 

0.19 

0.29 

0.38 

0.48 

0-57 

0.67 

0.76 

0.86 

0-95 

130 

0.10 

0.21 

0.3I 

0.41 

0.52 

0.62 

0.72 

0.83 

0.93    |    1.03 

i               i              i 

CORRECTION  FOR  CENTIGRADE  THERMOMETERS. 
Values  of  0.000143  n  (tf  —  t} 


V- 

-  1 

n 

10° 

20° 

30° 

40° 

5O° 

60° 

7O° 

80° 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

c. 

10° 

O?OI 

o?o3 

o?o4 

o?o6 

o?o7 

o?09 

0?IO 

0?II 

20 

0.03 

0.06 

0.09 

0.  II 

0.14 

0.17 

0.20 

0.23 

3° 

0.04 

0.09 

0.13 

0.17 

O.2I 

0.26 

0.30 

0.34 

40 

0.06 

O.  II 

0.17 

0.23 

0.29 

0-34 

O.4O 

0.46 

50 

0.07 

0.14 

0.21 

0.29 

0.36 

0-43 

0.50 

0.57 

60 

0.09 

0.17 

0.26 

0.34 

o.43 

0.51 

O.6O 

0.69 

70 

O.IO 

O.2O 

0.30 

0.40 

0.50 

0.60 

O.7O 

0.80 

80 

O.I  I 

0.23 

0-34 

0.46 

o.57 

0.69 

0.80 

0.92 

9° 

0.13 

0.26 

0-39 

0.51 

0.64 

0.77 

0.90 

1.03 

100 

0.14 

0.29 

0-43 

0.57 

0.72 

0.86 

1.  00 

1.14 

When  fit   {fe7sater|   than  t  the  correction  is  to  be 


12 


TABLES  FOR  THE  MERCURIAL  BAROMETER. 


Reduction  of  the  barometer  to  standard  temperature  — 

English  measures TABLE  10 

Metric  measures n 

Reduction  of  the  barometer  to  standard  gravity  at  latitude  45° — 

English  measures TABLE  12 

Metric  measures 13 

Reduction  of  the  barometer  to  sea  level  —  English  measures. 

Values  of  2000  m .     .  TABLE  14 

Correction  of  2000  m  for  latitude 15 

BQ—  B  =  B(iom—  i) 16 

Reduction  of  the  barometer  to  sea  level  —  Metric  measures. 

Values  of  2000  m TABLE  17 

Correction  of  2000  m  for  latitude 18 

BQ  — B=B(iom—i} 19 

Determination  of  heights  by  the  barometer  —  English  measures. 

Values  of  60368  [i  -f  0.0010195  X  36]  log  29-9°  ^  .v     ^          TABLE  20 

B 

Term  for  temperature 21 

Correction  for  latitude  and  weight  of  mercury  ....  22 

Correction  for  an  average  degree  of  humidity    .     .     .-    ;«  :-  23 

Correction  for  the  variation  of  gravity  with  altitude  .     .  24 
Determination  of  heights  by  the  barometer  —  Metric  measures. 

Values  of  18400^^ TABLE  25 

B 

Term  for  temperature %  26 

Correction  for  humidity  .     .     .  ;.  .  •  '. :  '; •' -,     .     .     .     .-    j^  27 

Correction  for  latitude  and   weight  of  mercury  .     .     .    '.-.'-•  28 

Correction  for  the  variation  of  gravity  with  altitude  .-     .  V  29 

Difference   of   height   corresponding   to  a  change  of  o.  i  inch 

in   the   barometer  —  English  measures TABLE  30 

Difference  of  height  corresponding  to  a  change  of  i  millimetre 

in  the  barometer  —  Metric  measures     .     .     .     .     ;     .     TABLE  31 
Determination  of  heights  by  the  barometer. 

Formula  of  Babinet •-.,-.     .     TABLE  32 

Barometric  pressures  corresponding  to  the  temperature  of  the 
boiling  point  of  water  — 

English  measures TABLE  33 

Metric  measures ;  -  34 


TABLE  10. 

REDUCtlON    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

19.0 

19.5 

20.0 

20.5 

21.0 

21.5 

22.0 

22.5 

23.0 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

4-0.050 

4-0.051 

+0.052 

+0.053 

+0.055 

+0.056 

+0.057 

+0.059 

+0.060 

+0.061 

+0.5 

+0.049 

4-0.050 

+0.051 

+0.053 

+0.054 

+0.055 

+0.056 

+0.058 

+0.059 

+O.o6o 

I.O 

.048 

.049 

.050 

.052 

.053 

•054 

•055 

•057 

.058 

•059 

i-5 

.047 

.048 

.049 

.051 

.052 

.053 

•054 

.056 

•057 

.058 

2.0 

.046 

.047 

.049 

.050 

.051 

.052 

•053 

•055 

.056 

•057 

2-5 

.045 

.046 

.048 

.049 

.050 

•  051 

.052 

•054 

•055 

.056 

3.0 

-1-0.044 

4-0.046 

+0.047 

+0.048 

+0.049 

+0.050 

+0.051 

+0.053 

+0.054 

+0.055 

3-5 

.043 

.045 

.046 

.047 

.048 

•049 

.050 

.051 

•053 

•054 

4.0 

•043 

.044 

•045 

.046 

.047 

.048 

.049 

.050 

.052 

•053 

4-5 

.042 

•043 

.044 

.045 

.046 

.047 

.048 

.049 

.051 

.052 

5-0 

.041 

.042 

•043 

.044 

•045 

.046 

•047 

.048 

.049 

.051 

5.5 

4-0.040 

4-0.041 

+0.042 

+0.043 

+0.044 

+0.045 

+0.046 

+0.047 

+0.048 

+0.049 

6.0 

•039 

.040 

.041 

.042 

.043 

.044 

•045 

.046 

.047 

.048 

6.5 

.038 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

.046 

.047 

7.0 

.037 

.038 

.039 

.040 

.041 

.042 

•043 

.044 

.045 

.046 

7-5 

.037 

.038 

.038 

•039 

.040 

.041 

.042 

•043 

.044 

•045 

8.0 

4-0.036 

4-0.037 

+0.038 

+0.038 

+0.039 

+0.040 

+0.041 

+0.042 

+0.043 

+0.044 

8.5 

.035 

•036 

.037 

.038 

.038 

•039 

.040 

.041 

.042 

•043 

9.0 

•034 

.035 

.036 

.037 

.038 

.038 

•039 

.040 

.041 

.042 

9-5 

•033 

•034 

•035 

.036 

.037 

.037 

.038 

.039 

.040 

.041 

IO.O 

.032 

•033 

.034 

•035 

.036 

.036 

•037 

.038 

•039 

.040 

10.5 

4-0.031 

4-0.032 

+0.033 

+0.034 

+0.035 

+0.035 

+0.036 

+0.037 

+0.038 

+0.039 

II.  0 

.030 

.031 

.032 

•033 

•034 

•034 

.035 

•036 

•037 

.038 

H.5 

.030 

.030 

.031 

.032 

•033 

.034 

.034 

•035 

.036 

•037 

I2.O 

.029 

.030 

.030 

.031 

.032 

•033 

•033 

.034 

•035 

.036 

12.5 

.028 

.029 

.029 

.030 

.031 

.032 

.032 

.033 

.034 

•034 

13.0 

4-0.027 

4-0.028 

+0.028 

+0.029 

+0.030 

+0.031 

+0.031 

+0.032 

+0.033 

+0.033 

13.5 

.026 

.027 

.028 

.028 

.029 

.030 

•030 

.031 

.032 

.032 

14.0 

.025 

.026 

.027 

.027 

.028 

.029 

.029 

.030 

.031 

.031 

14.5 

.024 

.025 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

.030 

15.0 

.024 

.024 

.025 

.025 

.026 

.027 

.027 

.028 

.029 

.029 

15.5 

4-0.023 

4-0.023 

+0.024 

+0.024 

+0.025 

+0.026 

+0.026 

+0.027 

+0.027 

+0.028 

16.0 

.022 

.023 

•023 

.024 

.024 

.025 

•  025 

.026 

.026 

.027 

16.5 

.021 

.022 

.022 

.023 

•023 

.024 

.024 

.025 

.025 

.026 

17.0 

.O2O 

.O2I 

.O2I 

.022 

.022 

.023 

.023 

.024 

.024 

.025 

17-5 

.OI9 

.020 

.020 

.021 

.021 

.022 

.022 

.023 

.023 

.024 

18.0 

4-0.018 

+O.OI9 

+0.019 

+O.O2O 

+0.020 

+0.021 

+0.021 

+0.022 

+0.022 

+0.023 

18.5 

.017 

.018 

.018 

.OI9 

;OI9 

.020 

.020 

.021 

.021 

.022 

19.0 

.017 

.017 

.018 

.018 

.018 

.019 

.019 

.020 

.O2O 

.O2I 

19-5 

.016 

.Ol6 

.017 

.017 

.017 

.018 

.018 

.019 

.OI9 

.O2C 

2O.O 

.015 

•  015 

.016 

.Ol6 

.016 

.017 

.017 

.018 

.018 

.018 

20.5 

t-o.oi4 

+0.014 

+0.015 

+0.015 

+O.OI6 

+0.016 

+O.OI6 

+0.017 

+0.017 

+0.017 

21.0 

.013 

.OI4 

.014 

.014 

.015 

.015 

.015 

.016 

.016 

.Ol6 

2L5 

.012 

.013 

.013 

•013 

.014 

.014 

.014 

.015 

.015 

.015 

22.  0 

.Oil 

.OI2 

.012 

.012 

.013 

.013 

.013 

.OI4 

.OI4 

.014 

22.5 

.Oil 

.Oil 

.Oil 

.Oil 

.012 

.012 

.OI2 

.013 

.013 

.013 

23.0 

4-0.010 

+0.010 

+0.010 

+0.010 

+0.01  1 

+O.OII 

+0.01  1 

+0.012 

+0.012 

+0.012 

23-5 

.009 

.009 

.009 

.010 

.010 

.010 

.010 

.Oil 

.Oil 

.Oil 

24.0 

.008 

.008 

.008 

.009 

.009 

.009 

.009 

.OIO 

.010 

.010 

24-5 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.009 

.OO9 

.009 

25.0 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

.008 

.008 

.008 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF    THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


I  Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER   IN   INCHES. 

19.0 

19.5 

20.O     20.5 

21  .0 

21.5 

22.O     22.5     23.0     23.5 

F. 

Inch. 

Inch. 

Inch.         Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

f  0.005 

+0.006 

+O.OO6 

+0.006 

+0.006 

+0.006 

+0.006 

+O.OO6 

+0.007 

+0.007 

26.0 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.006 

26.5 

.004 

.004 

.004 

.OO4 

.004 

.004 

.004 

.004 

.004 

.005 

27.0 

.003 

.003 

.003 

.003 

.003 

•003 

.003 

.003 

•003 

.003 

27-5 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.OO2 

.002 

.002 

28.0 

-|-O.OOI 

+0.001 

+O.OOI 

+O.OOI 

+O.OOI 

+O.OOI 

+0.001 

+O.OOI 

+  O.OOI 

+0.001 

28.5 

O.OOO 

O.OOO 

O.OOO 

0.000 

0.000 

O.OOO 

0.000 

O.OOO 

O.OOO 

O.OOO 

29.0 

-0.001 

—  0.001 

—  0.001 

—  0.001 

—  0.001 

—  0.001 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

30.0 

.OO2 

.OO2 

.OO2 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

-0.003  i—  0.003 

-0.003 

-0.003 

—0.004 

—0.004 

—0.004 

—0.004 

—  0.004 

—0.004 

31.0 

.004 

.004 

.OO4 

.004 

.005 

.005 

.005 

.005 

.005 

.005 

3i-5 

.005 

.005 

-005 

•  005 

.005 

.006 

.006 

.006 

.006 

.006 

32.0 

.OO6 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

32.5 

.007 

.007 

..007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

33.0 

-O.OOS 

—O.OOS 

—O.OOS 

—O.OOS 

—0.008 

—  0.009 

—0.009 

—0.009 

—  0.009 

—0.009 

33-5 

.008 

.009 

.009 

.009 

.009 

.010 

.010 

.010 

.010 

.OIO 

34-o 

.009 

.OIO 

.OIO 

.010 

.OIO 

.010 

.Oil 

.Oil 

.Oil 

.on 

34-5 

.OIO 

.OIO 

.on 

.Oil 

.on 

.Oil 

.012 

.012 

.012 

.013 

35-0 

.Oil 

.on 

.012 

.012 

.012 

.012 

.013 

.013 

.013 

.014 

35.5 

—  O.OI2 

—  O.OI2 

—  O.OI2 

—0.013 

—0.013 

—0.013 

—0.014 

—O.OI4 

—0.014 

-0.015 

36.0 

.013 

.013 

.013 

.014 

.014 

.014 

.015 

.015 

.015 

.016 

36.5 

.014 

.014 

.014 

.015 

.015 

.015 

.016 

.016 

.016 

.017 

37-o 

.014 

.015 

.015 

.016 

.016 

.016 

.017 

.017 

.017 

.018 

37-5 

.015 

.Ol6 

.016 

.017 

.017 

.017 

.018 

.018 

.019 

.019 

38.0 

—  0.016 

—O.OI7 

—0.017 

—0.017 

—0.018 

—0.018 

—0.019 

—  O.OI9 

—  O.O2O 

—  O.O2O 

38.5 

.017 

.017 

.018 

.018 

.019 

.019 

.020 

.O2O 

.021 

.021 

39-° 

.018 

.018 

.019 

.019 

.020 

.020 

.021 

.021 

.022 

.022 

39-5 

.019 

.019 

.020 

.020 

.021 

.021 

.022 

.022 

.023 

.023 

40.0 

.020 

.O2O 

.021 

.021 

.022 

.022 

.023 

.023 

.024 

.024 

40.5 

-O.O2O 

—  O.O2I 

—  O.O22 

—0.022 

-0.023 

—0.023 

—O.O24 

—0.024 

—0.025 

-0.025 

41.0 

.O2I 

.022 

.022 

.023 

.024 

.024 

.025 

.025 

.026 

.026 

41.5 

.022 

.023 

.023 

.024 

.025 

.025 

.026 

.026 

.027 

.027 

42.0 

.023 

.024 

.024 

.025 

•025 

.026 

.027 

.027 

.028 

.029 

42.5 

.024 

.025 

.025 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

43.0 

-0.025 

—0.025 

—0.026 

—0.027 

—0.027 

—0.028 

—0.029 

—0.029 

-0.030 

—0.031 

43-5 

.026 

.026 

.027 

.028 

.028 

.029 

.030 

.030 

.031 

.032 

44.0 

.026 

.027 

.028 

.029 

.029 

.030 

.031 

.031 

.032 

•033 

44-5 

.027 

.028 

.029 

.030 

.030 

.031 

.032 

.032 

•033 

•034 

45-  ° 

.028 

.029 

.030 

.030 

.031 

.032 

•033 

•033 

•034 

•035 

45.5 

—0.029 

—0.030. 

—0.031 

—0.031 

-0.032 

-0.033 

-0.034 

-0.034 

-0.035 

-0.036 

46.0 

.030 

.031 

.031 

.032 

•033 

•034 

•035 

•035 

.036 

•037 

46.5 

.031 

.032 

.032 

•033 

•034 

•035 

.036 

.036 

•037 

.038 

47.0 

.032 

.032 

•033 

•034 

•035 

.036 

•037 

•037 

.038 

•039 

47-5 

•033 

•033 

•034 

•035 

.036 

•037 

.038 

.038 

•039 

.040 

48.0 

-0.033 

-0.034 

-0.035 

—0.036 

-0.037 

-0.038 

-0.039 

—0.040 

—0.040 

—0.041 

48.5 

•034 

•035 

•036 

•037 

.038 

•039 

.040 

.041 

.041 

.042 

49.0 

•035 

.036 

•037 

.038 

•039 

.040 

.041 

.042 

.042 

•043 

49-5 

.036 

•037 

.038 

•039 

.040 

.041 

.042 

•043 

•044 

.044 

50.0 

.037 

•038 

•039 

.      .040 

.041 

.042 

•043 

.044 

0.45 

.046 

SMITHSONIAN  TABLES. 


TABLE   10. 
REDUCTION    OF    THE    BAROMETER    TO    STANDARD  TEMPERATURE, 

ENGLISH     MEASURES. 


Attached 
|    Ther- 
mometer 
;  Fahren- 
heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

19.  0 

19.5      20.  0 

20.5 

21.0 

21.5 

22.0 

22.5 

23.O 

23.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.038 

-0.039 

—0.040 

—0.041 

—0.042 

-0.043 

—0.044 

-0.045 

—0.046 

-0.047 

51.0 

•039 

.040 

.041 

.042 

•043 

.044 

-045 

.046 

0.47 

.048 

5i-5 

•039 

.040 

.041 

.042 

.044 

-045 

.046 

.047 

.048 

.049 

52.0 

.040 

.041 

.042 

•043 

.044 

.046 

.047 

.048 

.049  1     .050    ; 

52.5 

.041 

.042 

•043 

.044 

•045 

.047 

.048 

.049 

.050 

.051 

53.0 

—0.042 

-0.043 

—  0.044 

-0.045 

—0.046 

-0.047 

-0.049 

-0.050 

—0.051 

-0.052 

53-5 

•°43 

.044 

•045 

.046 

.047 

.048 

.050 

.051 

.052 

•053 

54-0 

.044 

•045 

.046 

.047 

.048 

•049 

.051 

.052 

•053 

•054 

54-5 

-045 

.046 

.047 

.048 

.049 

.050 

.052 

•053 

.054 

•055 

55-0 

•045 

.047 

.048 

.049 

.050 

.051 

•053 

•054 

.055 

.056 

55.5 

—0.046 

-0.047 

—0.049 

—0.050 

—0.051 

—0.052 

-0.054 

-0.055 

-0.056 

-0.057 

56.0 

.047 

.048 

.050 

.051 

.052 

•053 

•055 

.056 

•057 

.058 

56.5 

.048 

.049 

.050 

.052 

•053 

•054 

.056 

-057 

.058 

•059 

57-0 

.049 

.050 

.051 

•053 

•054 

•055 

•057 

•  058 

.059 

.060 

|    57-5 

.050 

.051 

.052 

•054 

•055 

.056 

.058 

•059 

.060 

.061 

58.0 

-0.051 

-0.052 

-0.053 

-0.055 

—0.056 

-0.057 

-0.059 

—0.060 

—0.06  1 

-0.063 

58.5 

.051 

•053 

•054 

•055 

•057 

•058 

.060 

.061 

.062 

.064 

59-o 

.052 

•054 

•055 

.056 

.058 

•059 

.061 

.062 

.063 

.065 

59-5 

•053 

•055 

.056 

•057 

•059 

.060 

.061 

.063 

.064 

.066 

60.0 

•054 

•055 

•057 

.058 

.060 

.061 

.062 

.064 

.065 

.067 

60.5 

-0-055 

—0.056 

-0.058 

-0.059 

—  0.061 

—O.o62 

-0.063 

—0.065 

-0.066 

-0.068 

61.0 

.056 

•057 

•059 

.060 

.062 

.063 

.064 

.066 

.067 

.069 

61.5 

.057 

.058 

.060 

.061 

.062 

.064 

•065 

.067 

.068 

.070 

62.0 

•057 

•059 

.060 

.062 

.063 

•065 

.066 

.068 

.069 

.071 

62.5 

.058 

.060 

.061 

•063 

.064 

.066 

.067 

.069 

.071      .072 

63.0 

-0.059 

—  0.061 

—0.062 

—0.064 

—0.065 

—0.067 

-0.068 

—0.070 

-0.072  -0.073 

63-5 

.060 

.062 

.063 

•065 

.066 

0.68 

.069 

.071 

.073      .074 

64.0 

.061 

.062 

.064 

.066 

.067 

.069 

.070 

.072 

.074      .075 

64-5 

.062 

.063 

•065 

.067 

.068 

.070 

.071 

-073 

.075      .076 

65.0 

.063 

.064 

.066 

.067 

.069 

.071 

.072 

.074 

.076      .077    1 

65.5 

-0.063 

—0.065 

—0.067 

-0.068 

—0.070 

—0.072 

-0.073 

-0.075 

-0.077 

—0.078 

66.0 

.064 

.066 

.068 

.069 

.071 

•073 

.074 

.076 

.078 

.079 

66.5 

.065 

.067 

.069 

.070 

.072 

.074 

•075 

.077 

.079 

.O8l 

67.0 

.066 

.068 

.069 

.071 

•073 

•075 

.076 

.078 

.080 

.082 

67-5 

.067 

.069 

.070 

.072 

.074 

.076 

.077 

.079 

.081 

•083 

68.0 

-0.068 

—0.069 

—0.071 

-0.073 

-0.075 

—0.077 

—0.078 

—0.080 

-0.082 

—0.084 

68.5 

.069 

.070 

.072 

.074 

.076 

.078 

.079 

.081 

.083 

.085 

69.0 

.069 

.071 

•073 

•075 

.077 

.079 

.080 

.082 

.084 

.086 

69-5 

.070 

.072 

.074 

.076 

.078 

•079 

.081 

•083 

-085 

.087 

70.0 

.071 

•073 

•075 

.077 

•079 

.080 

.082 

.084 

.086      .088 

70.5 

—0.072 

-0.074 

—0.076 

—0.078 

—0.080 

—0.081 

-0.083 

-0.085 

-0.087 

—0.089 

71.0 

•073 

•075 

,077 

.079 

.080 

.082 

.084 

.086 

.088 

.090 

71-5 

.074 

.076 

.078 

.079 

.081 

.083 

•085 

.087 

.089 

.091 

72.0 

•075 

.076 

.078 

.080 

.082 

.084 

.086 

.088 

.090 

.092 

72.5 

•075 

.077 

.079 

.081 

.083 

.085 

.087 

.089 

.091 

•093 

73.0 

—0.076 

—0.078 

—0.080 

-0.082 

-0.084 

-0.086 

-0.088 

—0.090 

—0.092 

-0.094 

73-5 

.077 

.079 

.081 

.083 

.085 

.087 

.089 

.091 

•093 

•095 

74.0 

.078 

.080 

.082 

.084 

.086 

.088 

.090 

.092 

.094 

.096 

74-5 

.079 

.081 

.083 

•085 

.087 

.089 

.091 

•093 

•095 

.097 

75-0 

.080 

.082 

.084 

.086 

.088        .090 

.092 

.094 

.096 

•°99 

I                                                                                  t 

1 

SMITHSONIAN  TABLES. 


16 


TABLE   10 
REDUCTION    OF    THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
i  Fahren- 
heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

19.0 

19.5 

20.0 

20.5 

21  .0   i   21.5      22.O     22.5     23.O      23.5 

F. 

Inch. 

Inch. 

Inch,    j     Inch,    i    Inch,    j    Inch.        Inch. 

Inch.         Inch.    '.     Inch. 

75?5 

-O.oSl 

-0.083 

—0.085   —0.087 

—0.089  —0.091  —0.093 

—  0.095   —0.097  :—  0.100 

76.0 

.081 

.084 

.086 

.088 

.090 

.092 

.094 

.096 

.098 

.IOI 

76.5 

.082 

.084 

.087 

.089 

.091 

•093 

•095 

.097 

.100 

.102 

77-0 

-083 

.085 

.087 

.090 

.092 

.094 

.096 

.098 

.IOI 

.103 

77-5 

.084 

.086 

.088 

.091 

•093 

•095 

.097 

.099 

.102 

.104 

| 

78.0 

-0.085 

-0.087 

—0.089 

—0.091 

-0.094 

—  0.096 

—0.098 

—  O.  IOO 

-0.103 

—  0.105 

78.5 

.086 

.088 

.090 

.092 

•095 

.097 

.099 

.IOI 

.104 

.106 

79.0 

.086 

.089 

.091 

•093 

.096 

.098 

.IOO 

.102 

.105 

.107 

79-5 

.087 

.090 

.092 

.094 

.097 

.099 

.IOI 

.103 

.106 

.108 

80.0 

.088 

.09I 

•°93 

•095 

.097 

.100 

.102 

.104 

.107 

.109 

80.5 

—0.089 

—0.091 

-0.094 

—0.096 

—0.098 

—  O.  IOI 

-0.103 

—  o.  105 

—0.108 

—O.IIO 

81.0 

.090 

.092 

•095 

.097 

.099 

-,  .102 

.IO4 

.106 

.109 

.III 

81.5 

.091 

•093 

.096 

.098 

.100 

.103 

.105 

.107 

.110 

.112 

82.0 

.092 

.094 

.096 

.099 

.101 

.104 

.106 

.108 

.III 

•IT3 

82.5 

.092 

•095 

.097 

.100 

.102 

.105 

.107 

.109 

.112 

.114 

83.0 

-0.093 

—0.096 

-0.098 

—  O.  IOI 

—  o.  103 

—  o.  106 

-o.  108 

—  O.  Ill 

-O.II3 

-0.115 

83-5 

.094 

.097 

.099 

.102 

.IO4 

.107 

.109 

.112 

.114 

.117 

84.0 

.095 

.098 

.IOO 

.103 

.105 

.108 

.no 

.H3 

•US 

.118 

84-5 

.096 

.098 

.101 

.103 

.106 

.108 

.in 

.114 

.116 

.119 

85.0 

.097 

.099 

.102 

.104 

.107 

.109 

.112 

.115  j        .117  i        .120 

85.5 

-0.098 

—  O.  IOO 

-0.103 

—0.105  —0.108 

—  O.IIO 

—0.113 

—  o.  116 

-O.II8 

—  O.I2I 

86.0 

.098 

.101 

.IO4 

.106 

.109 

.III 

.114 

.117 

.119 

.122 

86.5 

.099 

.102 

.105 

.107 

.no 

.112 

.115 

.118 

.120 

.123 

87.0 

.IOO 

.103 

•105 

.108 

.in 

•113 

.116 

.119 

.121 

.124 

87.5 

.101 

.104 

.106 

.109 

.112 

.114 

.117 

.120 

.122 

•125 

88.0 

—  O.  IO2 

-0.105 

—  0.107 

—  o.  no 

-0.113 

—O.II5 

—0.118 

—  0.  121 

-0.123 

—  O.I26 

88.5 

.103 

.105 

.108 

.in 

.114 

.116 

.119 

.122 

.124 

.127 

89.0 

.104 

.106 

.109 

.112 

.114 

.117 

.120 

.123 

.125 

.128 

89-5 

.104 

.107 

.110 

•ii3 

•US 

.118 

.121 

.124 

.126 

.129 

90.0 

.105 

.108 

.III 

.114 

.116 

.119 

.122 

•125 

.127 

.130 

90.5 

—  o.  1  06 

—0.109 

—  O.II2 

—0.114 

—0.117 

—O.I  2O 

-0.123 

—  O.I26 

-0.128 

—O.I3I 

91.0 

.107 

.no 

•113 

•US 

.118 

.121 

.124 

.127 

.129 

.132 

9J-5 

.108 

.III 

•113 

.116 

.119 

.122 

.125 

.128 

•131 

•133 

92.0 

.109 

.112 

.114 

.117 

.120 

.123 

.126 

.129 

.132 

.134 

92.5 

.110 

.112 

•US 

.118 

.121 

.124 

.127 

.130 

•133 

•135 

93.0 

—  O.  I  IO 

—O.II3 

—  o.  116 

—0.119 

—  0.  122 

—0.125 

-0.128 

-O.I3I 

-0.134 

-0.137 

93-5 

.III 

.114 

.117 

.120 

.123 

.126 

.I29 

.132 

.135 

.138 

94.0 

.112 

•"5 

.118 

.121 

.124 

.127 

.130 

•133 

.136 

•139 

94-5 

•113 

.116 

.119 

.122 

•125 

.128 

•131 

•134 

•137 

.I4O 

95-0 

.114 

.117 

.120 

.123 

.126 

.129 

.132 

•  135 

.138 

.141 

95.5 

-O.II5 

-0.118 

—  O.I2I 

—  O.I24 

-0.127  j-0.130 

-0.133 

-0.136 

-0.139 

—  o.  142 

96.0 

•US 

.119 

.122 

•125 

.128 

•131 

•134 

.137 

.140 

•143 

96.5 

.116 

.119 

.122 

.126 

.129 

.132 

•135 

.138 

.141 

.144 

97.0 

.117 

.120 

.123 

.126 

.130 

•133 

.136 

•139 

.142 

•145 

97-5 

.118 

.121 

.124 

.127 

.130 

•134 

•137 

.1401      .143 

.146 

i 

98.0 

—O.II9 

—  0.  122 

-0.125 

-0.128 

-O.I3I 

-0.135 

-0.138 

—0.141 

—  O.I44  1—0.147 

98.5 

.120 

.123 

.126 

.129 

.132 

•135 

•139 

.142 

M45           .148 

99.0 

.121 

.124 

.127 

.130 

•133 

.136 

.I4O 

•143 

.146 

.149 

99-5 

.121 

•125 

.128 

•131 

•134 

•137 

.141 

.144 

.147 

.150 

IOO.O 

.122 

.126 

.129 

.132 

•135 

.138 

.142 

.145 

.148!        -I51 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD   TEMPERATURE. 

ENGLISH    MEASURES. 


!  Attached 
Ther- 
mometer 
Fahren- 

j     heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

24.0 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

+0.065 

+0.066 

+0.066 

+0.067 

+0.067 

+0.5 

+0.061 

+0.062 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

+0.065 

+0.066 

+0.066 

I.O 

.060 

.061 

.061 

'.062 

.062 

.063 

.063 

.064 

.064 

.065 

i-5 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

2.0 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

2-5 

•057 

.058 

.058 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

3.0 

+0.056 

+0.056 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

+0.059 

+0.o6o 

+O.o6o 

3-5 

•055 

•055 

.056 

.056 

•057 

•057 

.058 

.058 

•059 

•059 

4.0 

•054 

•054 

•055 

•055 

.056 

.056 

•057 

•057 

•057 

.058 

4-5 

•053 

.053 

.054 

•054 

•054 

•055 

-055 

.056 

.056 

.057 

5-o 

.052 

.052 

.052 

•053 

•053 

•054 

•054 

•055 

•055 

.056 

5.5 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

+0.053 

+0.053 

+0.053 

+0.054 

+0.054 

6.0 

.049 

.050 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

6.5 

.048 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.052 

.052 

7.0 

.047 

.048 

.048 

.048 

•049 

.049 

.050 

.050 

.050 

.051 

7-5 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

8.0 

+0.045 

+0.045 

+0.046 

+0.046 

+0.047 

+0.047 

+0.047 

+0.048 

+0.048 

+0.048 

8-5 

.044 

.044 

•045 

-045 

•045 

.046 

.046 

.047 

.047 

.047 

9.0 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

9-5 

.042 

.042 

.042 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

IO.O 

.041 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

•043 

.044 

10.5 

+0.040 

+0.040 

+0.040 

+0.041 

+O.O4I 

+0.041 

+0.042 

+0.042 

+0.042 

+0.043 

II.  0 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

11.5 

•037 

.038 

.038 

.038 

•039 

•039 

•039 

.040 

.040 

.040 

12.0 

.036 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

•039 

•039 

12.5 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

•037 

.038 

.038 

13.0 

+0.034 

+0.034 

+0.035 

+0.035 

+0.035 

+0.036 

+0.036 

+0.036 

+0.036 

+0.037 

13-5 

•033 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

•035 

.036 

14.0 

.032 

.032 

.032 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

14.5 

.031 

•031 

.031 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

15-0 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

15.5 

+0.029 

+0.029 

+0.029 

+0.029 

+0.030 

+0.030 

+0.030 

+0.030 

+0.031 

+0.031 

16.0 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.030 

16.5 

.026 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

17.0 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

17.5 

.024 

.024 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

18.0 

+0.023, 

+0.023 

+0.024 

+0.024 

+O.O24 

+0.024 

+0.024 

+0.025 

+0.025 

+0.025 

18.5 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

.023 

.024- 

.024 

19.0 

.021 

.021 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

!9-5 

.020 

.020 

.020 

.O2O 

.021 

.021 

.021 

.021 

;02I 

.021 

20.0 

.019 

.019 

.019 

.019 

.019 

.020 

.020 

.O2O 

.O2O 

.020 

20.5 

+O.OI8 

+0.018 

+0.018 

+O.OI8 

+  0.018 

+0.018 

+0.019 

+O.OI9 

+O.OI9 

+O.OI9 

1      21.0 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

j      21.5 

.Ol6 

.Ol6 

.016 

.016 

.Ol6 

.016 

.Ol6 

.016 

.017 

.017 

i      22.0 

.OI4 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.015 

.016 

22.5 

.013 

.013 

.OI4 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

23.0 

+O.OI2 

+0.012 

+0.012 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

+0.013 

23.5 

.Oil 

.Oil 

.Oil 

.Oil 

.OI2 

.012 

.012 

.012 

.012 

.012 

24.0 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

24-5 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.OIO 

.OIO 

.OIO 

25.0 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.009 

SMITHSONIAN  TABLES. 


18 


TABLE  10, 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD    TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER   IN   INCHES. 

24.O 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4 

25.6 

25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

+0.007 

26.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

26.5 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27.0 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

27.5 

.OO2 

.OO2 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

+0.001 

28.5 

0.000 

0.000 

0.000 

0.000 

0.000 

0.000 

o.ooo 

0.000 

o.ooo 

0.000 

29.0 

—  0.001 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

.002 

30.0 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

—0.004 

31.0 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.006 

.006 

3!-5 

.006 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

32.0 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

32.5 

.008 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

33.0 

—  0.010 

—  o.oio 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

—O.OIO 

33-5 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

34-o 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.013 

34-5 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.014 

.014 

.014 

35-0 

.OI4 

.014 

.014 

.014 

.014 

.014 

.015 

.015 

•015 

.015 

35.5 

-0.015 

—0.015 

—0.015 

—0.015 

—0.015 

—  0.016 

—  0.016 

—  0.016 

—  0.016 

—  0.016 

36.0 

.016 

.016 

.016 

.016 

.017 

.017 

.017 

.017 

.017 

.017 

36.5 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

37-0 

.018 

.018 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

37-5 

.019 

.019 

.020 

.020 

.020 

.020 

.020 

.020 

.021 

.021 

38.0 

—0.020 

—0.021 

—0.021 

—0.021 

—0.021 

—0.021 

—0.021 

—  O.O22 

—0.022 

—0.022 

38.5 

.021 

.022 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

39-o 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

39-5 

.024 

.024 

.024 

.024 

.024 

•  025 

.025 

.025 

.025 

.025 

40.0 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

40.5 

-0.026 

—O.O26 

—0.026 

—0.026 

—0.027 

—0.027 

—0.027 

—0.027 

—0.028 

—0.028 

41.0 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

4i-5 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

42.0 

.029 

.029 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

42-5 

.030 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

43.0 

-0.031 

-0.032 

—0.032 

—0.032^ 

—O.O32 

-0.033 

-0.033 

-0.033 

-0.033 

-0.034 

43-5 

.032 

•033 

•033 

•°33* 

•033 

•034 

•034 

.034 

•035 

•035 

44.0 

•033, 

•034 

•034 

•034 

•035 

•035 

•035 

.035 

.036 

.036 

44-5 

•035 

•035 

•035 

•035 

.036 

.036 

.036 

•037 

•037 

.037 

45-0 

.036 

.036 

.036 

•037 

•037 

•037 

•037 

.038 

.038 

.038 

45.5 

-0.037 

-0.037 

-0.037 

-0.038 

—0.038 

—0.038 

—0.039 

-0.039 

-0.039 

-0.039 

46.0 

.038 

.038 

.038 

•039 

•039 

•039 

.040 

.040 

.040 

.041 

46.5 

•039 

•039 

.O4O 

.040 

.040 

.041 

.041 

.041 

.041 

.042 

47.0 

.040 

.040 

.O4I 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

47-5 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

.043 

.044 

.044 

48.0 

—O.O42 

—0.042 

-0.043 

—0.043 

-0.044 

—0.044 

—0.044 

—0.045 

—0.045 

-0.045 

48.5 

•043 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

49.0 

.044 

•045 

•045 

•045 

.046 

.046 

.047 

.047 

.047 

.048 

49-5 

•045 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

50.0 

.046 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

.050 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE, 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

24.0 

24.2 

24.4 

24.6 

24.8 

25.0 

25.2 

25.4  25.6  25.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.048 

—0.048 

—0.048 

-0.049 

—0.049 

-0.050 

-o.  050 

-0.050 

-0.051 

-0.051 

51.0 

.049 

.049 

.049 

.050 

.050 

.051 

.051 

.051 

•052 

.052 

5i-5 

.050 

.050 

.051 

.051 

.051 

•  052 

.052 

•053 

•053 

•053 

i  52.o 

.051 

.051 

.052 

.052 

•053 

•053 

•053 

•054 

•054 

•055 

52.5 

.052 

.052 

•053 

•053 

•054 

•054 

•055 

•055 

•055 

.056 

53.0 

-0.053 

-0.053 

—0.054 

-0.054 

-0.055 

-0-055 

—0.056 

—0.056 

-0.057  —0-057 

53-5 

-054 

•055 

•055 

•055 

•056 

•056 

•057 

•057 

.058 

•058 

54-° 

•055 

.056 

•056 

•057 

•057 

•057 

.058 

.058 

•059 

•059 

54-5 

.056 

•057 

•057 

.058 

.058 

-059 

•059 

.060 

.060 

.060 

I  55-0 

•057 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.062 

55.5 

—0.058 

-0.059 

-0.059 

—O.o6o 

—O.o6o 

—  0.061 

—  0.061 

—0.062 

—0.062 

—0.063 

56.0 

.060 

.060 

.060 

.061 

.061 

.062 

.062 

•063 

.063 

.064 

56.5 

.O6l 

.061 

.062 

.062 

.063 

.063 

.064 

.064 

•065 

.065 

57-o 

.062 

.062 

.063 

•063 

.064 

.064 

.065 

•065 

.066 

.066 

57-5 

•063 

•063 

.064 

.064 

•065 

.065 

.066 

.066 

.067 

.067 

58.0 

—0.064 

—0.064 

—0.065 

—0.065 

-0.066 

-0.066 

—0.067 

-0.068 

-0.068 

—0.069 

58.5 

.065 

•065 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

59-° 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

59-5 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.072 

.072 

60.0 

.068 

.069 

.069 

.070 

.070 

.071 

.072 

.072 

•073 

•073 

60.5 

—0.069 

—0.070 

—0.070 

—0.071 

—0.072 

—0.072 

—0.073 

-0.073 

-0.074 

-0.074 

61.0 

.070 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

.076 

61.5 

.071 

.072 

•073 

•073 

.074 

.074 

•075 

.076 

.076 

.077 

62.0 

•073 

•073 

.074 

.074 

•075 

.076 

.076 

.077 

.077 

.078 

62.5 

.074 

.074 

•075 

•075 

.076 

.077 

.  -077 

.078 

.078 

•079 

63.0 

—0.075 

-0.075 

—0.076 

-0.077 

-0.077 

—0.078 

—0.078 

-0.079 

—O.oSo 

—  O.oSo 

63-5 

.076 

.076 

.077 

.078 

.078 

.079 

.080 

.080 

.081 

.O8l 

64.0 

.077 

.077 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

64-5 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

•083 

.084 

65.0 

.079 

.080 

.080 

.O8l 

.082 

.082  J 

.083 

.084 

.084 

.085 

65.5 

-0.080 

—O.oSl 

—O.oSl 

—0.082 

-0.083 

-0.083 

—0.084 

-0.085 

—  0.085  —0.086 

66.0 

.O8l 

.082 

.083 

•083 

.084 

.085 

.085 

.086 

.087    .087 

66.5 

.082 

.083 

.084 

.084 

•085 

.086 

.086 

.087 

.088 

.088 

67.0 

.083 

.084 

-085 

•085 

.086 

.087 

.087 

.088 

.089    .090 

67.5 

.084 

-085 

.086 

.087 

.087 

.088 

.089 

.089 

.090    .091 

68.0 

-0.085 

-0.086 

—0.087 

-0.088 

-0.088 

—0.089 

—0.090 

—0.090 

—0.091 

—0.092 

68.5 

.087 

.087 

.088 

.089 

.089 

-.090 

.091 

.092 

.092 

•093 

69.0 

.088 

.088 

.089 

.090 

.091 

.091 

.092 

-093 

.093  j   .094 

69-5 

.089 

.089 

.090 

.091 

.092 

.092 

•093 

.094 

•095    -°95 

70.0 

.090 

.091 

.091 

.092 

•093 

.094 

.094 

•095 

.096  !   .097 

70.5 

—0.091 

—0.092 

—0.092 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

—0.097 

-0.098 

71.0 

.092 

•093 

.094 

.094 

•095 

.096 

.097 

.097 

.098 

.099 

71-5 

•093 

.094 

-095 

•095 

.096 

.097 

.098 

.098 

.099 

.IOO 

72.0 

.094 

•095 

.096 

.096 

.097 

.098 

.099 

.IOO 

.100 

.IOI 

72-5 

•095 

.096 

.097 

.098 

.098 

.099 

.100 

.IOI 

.IO2  !   .IO2 

| 

73.0 

—0.096 

-0.097 

—0.098 

-0.099 

—  0.100 

—  O.IOO 

—  O.  IOI 

—  O.  IO2 

—0.103  —0.104 

73-5 

.097 

.098 

.099 

.100 

.101 

.101 

.102 

.103 

.104    .105 

74.0 

.098 

.099 

.100 

.101 

.102 

.103 

.103 

.104 

.105 

.106 

74-5 

.100 

.100 

.101 

.102 

.103 

.104 

.105 

.105 

.106 

.107 

75-0 

.101 

.101 

.102 

.103 

.IO4 

.105 

.106 

.106 

.107    .108 

SMITHSONIAN  TABLES. 


20 


TABLE  10. 

REDUCTION    OF  THE    BAROMETER    TO  STANDARD   TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

24.  0     24.2 

24.4     24.6      24.8     25.  0     25.2 

25.4     25.6 

25.8 

F. 

Inch. 

Inch.         Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—0.102 

-o.  103 

-o.  103 

—  o.  104 

—  0.  105 

—  o.  106 

—  0.107 

-0.  1  08 

-o.  108 

—0.109 

76.0 

.103 

.104 

.104 

.105 

.106 

.107 

.108 

.109 

.no 

.no 

76.5 

.IO4 

.105 

.106 

.106 

.107 

.108 

.109 

.  IIO 

.in 

.112      | 

77.0 

.105 

.106 

.107 

.108 

.108 

.109 

.110 

.III 

.112 

•113      I 

77-5 

.106 

.107 

.108 

.109 

.110 

.no 

.III 

.112 

•113 

.114    ! 

78.0 

—  o.  107 

-0.  1  08 

—0.109 

—  o.  no 

—  O.  Ill 

—  O.II2 

—  O.I  12 

—  O.II3 

—0.114 

-O.II5 

78.5 

.108 

.109 

.no 

.in 

.112 

•113 

.114 

.114 

•US 

.116      1 

79.0 

.109 

.no 

.III 

.112 

•US 

.114 

•115 

.116 

.117 

.117 

79-5 

.no 

.III 

.112 

•113 

.114 

•US 

.116 

.117 

.118 

.119      ! 

80.0 

.III    |        .112 

•113 

.114 

•US 

.116 

.117 

.118 

.119 

.I2O 

80.5 

—  O.II2 

—O.II3 

—O.II4 

—0.115 

—  o.  116 

—0.117 

—O.IlS 

—  O.II9 

—O.I  2O 

—  0.  121 

81.0 

.114 

•US 

•US 

.116 

.117 

.118 

.119 

.I2O 

.121 

.122 

81.5 

•US 

.116 

.117 

.118 

.118 

.119 

.I2O 

.121 

.122 

•123 

82.0 

.116 

.117 

.118 

.119 

.120 

.121 

.122 

.122 

.123 

.124 

82.5 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

.124 

•125 

.126 

83.0 

-0.118 

—O.II9 

—0.120 

—  0.  121 

—  0.  122 

—O.I23 

—O.I24 

-0.125 

—O.I26 

—0.127      i 

83-5 

.119 

.I2O 

.121 

.  122 

.123 

.124 

.125 

.126 

.127 

.128      | 

84.0 

.120 

.121 

.122 

.123 

.124 

•125 

.126 

.127 

.128 

.129 

84-5 

.121 

.122 

.123 

.124 

•125 

.126 

.127 

.128 

.129 

.130 

85-0 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

.129           .130 

.131 

85.5 

—0.123    —0.124 

—0.125 

—O.I26 

—O.I27 

-0.128 

—  O.I29 

-0.130 

—O.I3I 

-0.133 

86.0 

.124 

•125 

.126 

.127 

.128 

.130 

•131 

.132 

•133 

•134 

86.5 

•125 

.126 

.128 

.129 

.130 

•131 

.132 

•133 

-134 

•135 

87.0 

.126 

.128 

.129 

.130 

.131 

.132 

•133 

•134 

•135 

.136 

87-5 

.128 

.129 

.130 

.131 

.132 

•133 

•134 

;I35 

.136 

•137 

88.0 

—0.129 

-0.130 

-O.I3I 

-0.132 

-0.133 

-0.134 

-0.135 

-0.136 

-0.137 

-0.138 

88.5 

.130 

•131 

.132 

•133 

•134 

•135 

•.136 

•137 

.138 

•139 

89.0 

•131 

.132 

•133 

•134 

•135 

.136 

•137 

.138 

.140 

.141 

89-5 

.132 

•133 

•134 

•135 

.136 

•137 

.138 

.140 

.141 

.142 

90.0 

•133 

•134 

•135 

.136 

•137 

.138 

.140 

.141 

.142 

•143 

90.5 

-0.134 

-0.135 

—0.136 

-0.137 

-01.39 

—  o.  140 

—O.I4I 

—O.I42 

-0.143 

—0.144 

91.0 

'135 

.136 

•137 

.138 

.140 

.141 

.142 

•143 

.144 

•145 

9J-5 

.136 

•137 

.138 

.I4O 

.141 

.142 

•143 

.144 

•145 

.146 

92.0 

•  137 

.138 

.140 

.141 

.142 

•143 

.144 

•145 

.146 

.148 

92.5 

•138 

.139           .141 

.142 

•143 

.144 

•145 

.146 

.148 

.149 

93.0 

-0.139 

-O.I4I    —0'.I42 

-0.143 

-o.  144 

-0.145 

—  o.  146 

—  o.  148 

-0.149 

—0.150 

93-5 

.140 

.142 

•143 

.144 

-145 

.146 

.148 

.149 

.150 

.151 

94.0 

.142 

•143 

.144 

•145 

.146 

.147 

.149 

.150 

•151 

•152 

94-5 

•143 

.144 

-145 

.146 

.147 

•149 

.150 

•151 

.152 

•153 

95-o 

.144 

•145 

.146 

.147 

.149 

.150 

.151 

.152 

•153 

•154 

95.5 

-0.145 

—0.146 

-0.147 

—o.  148 

—0.150 

—  O.I5I 

—0.152 

-0.153 

-0.154 

—0.156 

96.0 

.146 

.147 

.148 

.150 

.151 

.152 

•153 

-154 

.156 

•157 

96.5 

.147 

.148 

.149 

•151 

.152 

-153 

•154 

.156 

•157 

.158 

97.0 

.148 

.149 

.150 

.152 

•153 

•154 

•155 

•157 

.158 

•!59 

97-5 

.149 

.150 

.152 

•153 

•154 

•155 

•157 

.158 

•159 

.160 

98.0 

-o.  150 

—O.I5I 

-0-153 

-0.154 

-0.155 

—0.156 

-0.158 

-0.159 

—O.I  60 

—  0.161 

98.5 

•I51 

•153 

-154 

•155 

.156 

.158 

•159 

.160 

.161 

.163 

99.0 

•152 

•154 

•155 

.156 

•157 

•159 

.160 

.161 

.162 

.164 

99-5 

•153 

•155 

.156 

•157 

•159 

.160 

.l6l 

.162 

.164 

.165 

IOO.O 

•154 

.156 

•157 

.158 

.160 

.161 

.162 

.163 

.165 

.166 

SMITHSONIAN  TABLES. 


21 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

+0.068 

+0.068 

+0.069 

-{-0.069 

+0.070 

+0.070 

+0.071 

+0.071 

+0.072 

+0.072 

+0.5 

fO.067 

+0.067 

+0.068 

4-0.068 

+0.069 

+0.069 

+0.070 

+0.070 

+0.071 

+0.071 

I.O 

•  065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

i-5 

.064 

.065 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

2.O 

.063 

.064 

.064 

.065 

.065 

.065 

.066 

.066 

.067 

.067 

2-5 

.062 

.062 

•063 

.063 

.064 

.064 

•  065 

.065 

.066 

.066 

3.0 

+0.061 

+0.061 

+0.062 

+0.062 

+0.063 

+0.063 

+0.063 

+0.064 

+0.064 

+0.065 

3-5 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

.063 

.064 

4.0 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

4-5 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

5-0 

.056 

.056 

•057 

•057 

.058 

.058 

•059 

•059 

•059 

.060 

5.5 

+0.055 

+0.055 

+0.056 

+0.056 

+0.056 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

6.0 

•054 

.054 

•054 

•055 

•055 

.056 

.056 

.056 

•057 

•057 

6-5 

.052 

•053 

•053 

•054 

•054 

•054 

•055 

-055 

.056 

.056 

7.0 

.051 

.052 

.052 

.052 

•053 

•053 

•054 

.054 

•054 

•055 

7-5 

.050 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

8.0 

+0.049 

+0.049 

+0.050 

+0.050 

+0.050 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

8.5 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.051 

•051 

9.0 

.046 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

9-5 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

10.0 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

10.5 

+0.043 

+0.043 

+0.044 

+0.044 

+0.044 

+0.045 

+0.045 

+0.045 

+0.046 

+0.046 

II.  0 

.042 

.042 

.042 

•043 

•043 

•043 

.044 

.044 

.044 

.045 

II-5 

.041 

.041 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

•043 

12.0 

•039 

.040 

.040 

.040 

.041 

.041 

.041 

.041 

.042 

.042 

12.5 

.038 

.038 

•039 

•039 

•°39 

.040 

.040 

.040 

.040 

.041 

13.0 

+0.037 

+0.037 

fo.038 

+0.038 

+0.038 

+0.038 

+0.039 

+0.039 

+0.039 

+0.040 

!3-5 

.036 

.036 

.036 

.037 

'   -037 

•037 

•037 

.038 

.038 

.038 

14.0 

•  035 

•035 

•035 

•035 

.036 

.036 

.036 

.036 

.037 

•037 

14-5 

•033 

•034 

•  034 

•034 

-034 

•035 

•035 

•035 

•035 

.036 

15-0 

.032 

.032 

•033 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

15.5 

+0.031 

+0.031 

+0.032 

+0.032 

+0.032 

+0.032 

+0.032 

+0.033 

+0.033 

+0.033 

16.0 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

.031 

.032 

.032 

16.5 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

17.0 

.    -027 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

17.5 

.026 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

18.0 

+0.025 

+0.025 

+0.026 

+0.026 

+O.O26 

+O.O26 

+O.O26 

+0.026 

+0.027 

+0.027 

18.5 

.024 

.024 

.024 

.024 

•  025 

.025 

.025 

•  025 

.025 

.026 

19.0 

.023 

.023 

.023 

.023 

•023 

.024 

.024 

.624 

.024 

.024 

19-5 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

20.0 

.020 

.021 

.021 

.O2I 

.021 

.O2I 

.021 

.021 

.022 

.022 

20.5 

+O.OI9 

+0.019 

+0.020 

+0.020 

+0.020 

+O.020 

+O.O2O 

+O.O2O 

+O.O2O 

+0.021 

21.0 

.018 

.018 

.018 

.018 

.019 

.Oig 

.OI9 

.019 

.019 

.019 

21.5 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

22.0 

.016 

.016 

.016 

,0l6 

.016 

.Ol6 

.016 

.017 

.017 

.017 

22.5- 

.014 

.015 

.015 

.015 

.015 

.015 

•015 

.015 

.015 

.015 

23.0 

4*0.013 

+0.013 

+0.014 

+0.014 

+0.014 

+0.014 

+O.OI4 

+0.014 

+0.014 

+  0.014 

23-5 

.012 

.012 

.012 

.012 

.012 

.013 

.013 

.013 

.013 

.013 

24.0 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.012 

.012 

.012 

24-5 

.010 

.010 

.010 

.010 

.010 

.010 

.010 

.010 

.010 

.110 

25.0 

.009 

.009 

.009 

.009 

.OOg 

.009 

.009 

.009 

.009 

.009 

SMITHSONIAN  TABLES. 


22 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT   OF  THE  BAROMETER   IN   INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

4-0.007 

+0.007 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

26.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

26.5 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27.0 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

+0.001 

+O.OOI 

+0.002 

+0.002 

+O.OO2 

+O.OO2 

+0.002 

+0.002 

+0.002 

+O.OO2 

28.5 

o.ooo 

0.000 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

0.000 

0.000 

0.000 

29.0 

—  0.001 

—O.OOI 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.OO2 

.002 

.002 

.OO2 

.002 

.002 

.002 

30.0 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

30.5 

—0.004 

—0.004 

—0.004 

—0005 

—0.005 

—0.005 

—0.005 

-0.005 

—0.005 

—0.005 

31.0 

.006 

.006 

.006 

.OO6 

.006 

.006 

.OO6 

.006 

.006 

.006 

3J-5 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

32-0 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.009 

32.5 

.009 

.009 

.009 

.009 

.009 

.009 

.010 

.010 

.010 

.010 

33.0 

-0.010 

—  0.010 

—  O.OIO 

—  O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

33-5 

.Oil 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

.012 

34-0 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.014 

34-5 

.014 

.014 

.014 

.014 

.014 

.OI4 

.014 

.015 

.015 

.015 

35-0 

.015 

.015 

.015 

.015 

.015 

.Ol6 

.016 

.016 

.016 

.016 

35.5 

-0.016 

—  0.016 

—  0.016 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

—0.017 

36.0 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

.019 

36.5 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

.020 

.020 

.020 

37-o 

.020 

.020 

.020 

.020 

.020 

.O2I 

.021 

.021 

.021 

.021 

37-5 

.021 

.021 

.021 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

38.0 

-O.O22 

—  O.O22 

—  O.O22 

—0.023 

—0.023 

—0.023 

-0.023 

—0.023 

—O.O23 

—O.O24 

38-5 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

•025 

•025 

.025 

39-° 

.024 

.025 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

39-5 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

40.0 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

.029 

40.5 

—O.O28 

—0.028 

—O.O28 

—O.O29 

—0.029 

—0.029 

—O.O29 

—0.030 

—0.030 

—0.030 

41.0 

.029 

.029 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

41-5 

.030 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

42.0 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033 

•034 

42-5 

.033 

•033 

•033 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

43.0 

-0.034 

-0.034 

-0.034 

-0.035 

-0.035 

-0.035 

-0.035 

—0.036 

—0.036 

—0.036 

43-5 

•035 

.035 

.036 

.036 

.036 

.036 

.037 

•037 

.037 

•037 

44.0 

.036 

.037 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

•039 

44-5 

•037 

.038 

.038 

.038 

•039 

•039 

•039 

•039 

.O4O 

.040 

45-0 

•039 

•039 

•°39 

•039 

.O4O 

.040 

.040 

.041 

.O4I 

.041 

45.5 

-0.040 

—0.040 

—0.040 

—0.041 

—0.041 

—O.O4I 

—O.O42 

—0.042 

—0.042 

-0.043 

46.0 

.041 

.041 

.042 

.042 

.042 

•043 

•°43 

•043 

•043 

.044 

46.5 

.042 

.042 

•043 

•043 

•043 

.044 

.044 

.044 

•045 

•045 

47.0 

•043 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

47-5 

•045 

.045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

48.0 

—0.046 

—0.046 

—0.046 

-0.047 

—0.047 

-0.047 

—0.048 

—0.048 

—0.048 

-0.049 

48.5 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

49.0 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.051 

.051 

.051 

49-5 

.049 

.050 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

•053 

50.0 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

SMITHSONIAN  TABLES. 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER  IN   INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.052 

—0.052 

—0.052 

-0.053 

-0.053 

-0.054 

-0.054 

-0.054 

-0.055 

-0-055 

51.0 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

5i-5 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

•057 

•057 

.058 

52.0 

•055 

•055 

.056 

.056 

•057 

•057 

.058 

.058 

.058 

•059 

52.5 

.056 

•057 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

53.0 

-0.057 

-0.058 

—0.058 

-0.059 

—0.059 

—O.o6o 

—O.o6o 

—  0.061 

—O.o6  1 

—O.o6  1 

53-5 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

54-o 

.060 

.060 

.061 

.061 

.062 

.062 

.063 

.063 

.063 

.064 

54-5 

.061 

.061 

.062 

.062 

•063 

•063 

.064 

.064 

.065 

•065 

55-0 

.062 

.063 

•063 

.064 

.064 

.064 

.065 

.065 

.066 

.066 

55.5 

-0.063 

—0.064 

—0.064 

—0.065 

—0.065 

-0.066 

—0.066 

—0.067 

—0.067 

—0.068 

56.0 

.064 

.065 

.065 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

56.5 

.066 

.066 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

57-0 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

57-5 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

58.0 

—0.069 

—0.070 

—0.070 

—0.071 

—0.071 

—0.072 

—0.072 

-0.073 

—0.073 

-0.074 

58.5 

.070 

.071 

.071 

.072 

.072 

•073 

.074 

.074 

•075 

•075 

59-° 

.072 

.072 

•073 

-073 

.074 

.074 

•075 

•075 

.076 

.O/6 

59-5 

•073 

•073 

.074 

.074 

•075 

•075 

.076 

.077 

.077 

.078 

60.0 

.074 

.074 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

60.5 

-0.075 

—0.076 

—0.076 

-0.077 

-0.077 

—0.078 

—0.078 

-0.079 

—0.080 

—O.oSo 

61.0 

.076 

.077 

.077 

.078 

.079 

.079 

.080 

.080 

.081 

.O8l 

61.5 

.077 

.078 

.079 

.079 

.080 

.080 

.O8l 

.082 

.082 

•083 

62.0 

.079 

.079 

.080 

.080 

.081 

.082 

.082 

.083 

.083 

.084 

62.5 

.080 

.080 

.081 

.082 

.082 

.083 

.083 

.084 

.085 

.085 

63.0 

-O.oSl 

—0.082 

—0.082 

—0.083 

-0.083 

—0.084 

-0.085 

-0.085 

—0.086 

—0.086 

63.5 

.082 

.083 

•083 

.084 

.085 

.085 

.086 

.086 

.087 

.088 

64.0 

•083 

.084 

.085 

.085 

.086 

.086 

.087 

.088 

.088 

.089 

64-5 

.084 

.085 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

65.0 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

.091 

.09-2 

65.5 

-0.087 

—0.087 

0.088 

—0.089 

-0.089 

—0.090 

—0.091 

—0.091 

—0.092 

-0.093 

66.0 

.088 

.089 

.089 

.090 

.091 

.091 

.092 

•093 

•°93 

.094 

66.5 

.089 

.090 

.090 

.091 

.092 

•093 

•093 

.094 

•095 

•095 

67.0 

.090 

.091 

.092 

.092 

•093 

.094 

.094 

•095 

.096 

•097 

67-5 

.092 

.092 

•093 

.094 

.094 

•095 

.096 

.096 

.097 

.098 

68.0 

-0.093 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

-0.097 

—0.098 

—0.098 

-0.099 

68.5 

.094 

•095 

•095 

.096 

.097 

.097 

.098 

.099 

.100 

.100 

69.0 

.095 

.096 

.096 

.097 

.098 

.099 

.099 

.100 

.101 

.102 

69-5 

.096 

.097 

.098 

.098 

.099 

.100 

.101 

.101 

.102 

.103 

70.0 

.097 

.098 

.099 

.IOO 

.100 

.101 

.102 

.103 

.103 

.IO4 

70.5 

—0.098 

-0.099 

—  0.100 

—  O.IOI 

—O.IOI 

—  O.  IO2 

—  o.  103 

—  o.  104 

—  o.  105 

—  o.  105 

71.0 

.100 

.IOO 

.101 

.102 

.103 

.103 

.IO4 

.105 

.106 

.107 

7i.5 

.101 

.IO2 

.102 

.103 

.104 

.105 

•105 

.106 

.107 

.108 

72.0 

.102 

.103 

.104 

.104 

.105 

.106 

.107 

.107 

.108 

.109 

72-5 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.no 

73.0 

—  o.  104 

—o.  105 

—  o.  106 

—o.  107 

-0.108 

—  o.  108 

—  o.  109 

—  o.  no 

—O.I  II 

—O.I  12 

73-5 

.105 

.106 

.107 

.108 

.109 

.no 

.no 

.in 

.112 

•113 

74.0 

.107 

.107 

.108 

.109 

.no 

.in 

.112 

.112 

•113 

.114 

74-5 

.108 

.109 

.109 

.no 

.in 

.112 

•113 

.114 

114 

•US 

75-0 

.109 

.110 

.in 

.112 

.112 

•113 

.114 

•  US 

116 

.117 

SMITHSONIAN  TABLES. 


TABLE  10 
REDUCTION    OF  THE   BAROMETER    TO  STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


'Attached 
Ther- 
mometer 
'••  Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER   IN   INCHES. 

26.0 

26.2 

26.4 

26.6 

26.8 

27.0 

27.2 

27.4 

27.6 

27.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—  O.  IIO 

—  O.  Ill 

—  O.II2 

—O.II3 

—O.II4 

—O.II4 

—O.II5 

—  O.II6 

—O.II7 

-O.II8 

76.0 

.III 

.112 

."3 

.114 

•US 

.116 

.116 

.117 

.118 

.119 

76.5 

•113 

•113 

.114 

•US 

.116 

.117 

.118 

.119 

.119 

.120 

77.0 

.1*4 

•US 

•  115 

.116 

.117 

.118 

.119 

.120 

.121 

.122 

77-5 

•  115 

.116 

.117 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

78.0 

—  o.  116 

—O.II7 

-0.118 

—O.II9 

—0.120 

—  O.  I2O 

—  0.  121 

—  0.  122 

—0.123 

—0.124 

78.5 

.117 

.118 

.119 

.120 

.121 

.122 

.123 

.123 

.124 

.125 

79.0 

.118 

.119 

.120 

.121 

.122 

.123 

.124 

.125 

.126 

.127 

79-5 

.120 

.120 

.121 

.122 

-.123 

.124 

.125 

.126 

.127 

.128 

So.o 

.121 

.122 

.123 

.123 

.124 

.125 

.126 

.127 

.128 

.I29 

80.5 

—  0.  122 

-0.123 

—0.124 

—0.125 

—0.126 

—O.I27 

—O.I27 

—0.128 

—O.I29 

—  o.  130 

Si.o 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

81.5 

.124 

.125 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

•133 

82.0 

.125 

.126 

.127 

.128 

.129 

.130 

.131 

.132 

•133 

•134 

82.5 

.127 

.128 

.128 

.129 

.130 

.131 

.132 

•133 

.134 

•135 

83.0 

—0.128 

—0.129 

-o.  130 

—O.I3I 

—O.I32 

-0.133 

—0.134 

-0.135 

—  o.  136 

-0.137 

83.5 

.129 

.130 

.131 

.132 

•133 

•134 

•135 

.136 

.137 

.138 

84.0 

.130 

•131 

.132 

•133 

.134 

•135 

.136 

•137 

.138 

•139 

84-5 

•131 

.132 

•133 

•134 

•135 

.136 

•137 

.138 

•139 

.140 

85.0 

.132 

•133 

•134 

•135 

.136 

•137 

.138 

•139 

.141 

.142 

85.5 

-0.134 

-0.135 

-o.  136 

-0.137 

-0.138 

-0.139 

—  o.  140 

—  o.  141 

—O.I42 

—  o.  143 

86.0 

•135 

.136 

.137 

.138 

•139 

.I4O 

.141 

.142 

•143 

.144 

86.5 

.136 

•137 

.138 

•139 

.I4O 

.141 

.142 

•143 

.144 

.145 

87.0 

-137 

.138 

•  139 

.I4O 

.141 

.142 

•143 

.144 

•145 

.147 

8/.5 

.138 

•139 

.140 

.141 

.142 

.144 

•145 

.146 

.147 

.148 

88.0 

-0.139 

—  o.  140 

—  o.  142 

-0.143 

-o.  144 

—  o.  145 

—  o.  146 

-0.147 

—0.148 

—0.149 

88.5 

.141 

.142 

.143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

89.0 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

.152 

89-5 

•143 

.144 

.145 

.146 

.147 

.148 

.149 

.151 

.152 

.153 

90.0 

.144 

•145 

.146 

.147 

.148 

.150 

.151 

.152 

•153 

.154 

90.5 

-0.145 

—  o.  146 

-0.147 

-0.149 

—  o.  150 

—O.I5I 

-0.152 

-0.153 

-0.154 

-0.155 

91.0 

.146 

.147 

.149 

.150 

•  151 

.152 

.153 

•154 

•155 

.157 

9J-5 

.148 

.149 

.150 

.151 

.152 

•153 

.154 

•155 

•157 

.158 

92.0 

.149 

.150 

.151 

.152 

.153 

•154 

.156 

•157 

.158 

•  159 

92.5 

.150 

.151 

.152 

•153 

.154 

.156 

•  157 

.158 

•159 

.160 

93.0 

—O.I5I 

-0.152 

-0.153 

-0.155 

—  o.  156 

-0.157 

—0.158 

-0.159 

—o.i  60 

—  o.  161 

93-5 

.152 

•  153 

.155 

.156 

•  157 

.158 

•  159 

.160 

.162 

•163 

94.0 

•153 

.155 

.156 

.157 

.158 

•159 

.160 

.162 

.163 

.164 

94-5 

•155 

.156 

-157 

.158 

•!59 

.160 

.162 

.163 

.164 

.165 

95-0 

.156 

.157 

.158 

•^59 

.160 

.162 

.163 

.I64 

.165 

.166 

95.5 

-0.157 

-0.158 

-0.159 

—  0.160 

—0.162 

—  o.  163 

—  o.  164 

—0.165 

—0.167 

-o.i  68 

96.0 

.158 

.159 

.160 

.162 

.163 

.164 

.165 

.167 

.168 

•     .169 

96.5 

•J59 

.160 

.162 

.163 

.164 

.165 

.167 

.168 

.169 

.170 

97.0 

.160 

.162 

.163 

.164 

.165 

.167 

.168 

.I69 

.170 

.171 

97-5 

.162 

.163 

.164 

.165 

.166 

.168 

.169 

.170 

.171 

•  173 

98.0 

-o.  163 

—  o.  164 

—  o.  165 

-0.166 

—o.  168 

—0.169 

—0.170 

—0.171 

-0.173 

-0.174 

98.5 

.164 

.165 

.166 

.168 

.169 

.170 

.171 

•173 

.174 

•  175 

99.0 

.165 

.166 

.168 

.169 

.170 

.171 

.173 

.174 

.175 

.176 

99-5 

.166 

.167 

.169 

.170 

.171 

•  173 

.174 

•175 

.176 

.178 

IOO.O 

•  167 

.169 

.170 

.171 

.172 

.174 

•175 

.176 

.178 

.179 

SMITHSONIAN  TABLES. 


TABLE  10, 

REDUCTION    OF  THE    BAROMETER   TO   STANDARD    TEMPERATURE. 

ENGLISH     MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE   BAROMETER    IN    INCHES. 

28.0     28.2 

28.4 

28.6      28.8     29.0     29.2     29.4     29.6     29.8 

F 

Inch.         Inch. 

Inch. 

Inch.        Inch.        Inch.        Inch. 

Inch. 

Inch. 

Inch. 

0?0 

4-0.073 

+0.074 

+0.074 

+0.075   +0.075    +0.076 

+0.076 

+0.077 

+0.077 

+0.078 

+0.5 

+0.072 

+0.072 

+0.073 

+0.073 

+0.074 

+0.074 

+0.075 

+0.075 

+0.076  +0.076 

I.O 

.070 

.071 

.071 

.072 

.072 

•073 

.073 

.074 

.074          .075 

i-5 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

.073          .074 

2.0 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072          .072 

2-5 

.067 

.067 

.068 

.068 

.069 

.069 

.069 

.070 

.070          .071 

3.0 

4-0.065 

+0.066 

+0.066 

+0.067 

+0.067 

+0.068  p-o.o68 

+0.069 

+0.069   +0.070 

3-5 

.064 

.065 

•065 

•065 

.066 

.066 

.067 

.067 

.068          .068 

4.0 

.063 

.063 

.064 

.064 

.065 

.065 

.065 

.066 

.066          .067 

4-5 

.062 

.062 

.062 

.063 

.063 

.064 

.064 

•065 

.065          .065 

5-0 

.060 

.061 

.061 

.062 

.062 

.062 

.063     .063 

.064         .064 

5.5 

-1-0.059 

+0.059 

+0.060 

+O.o6o 

+0.061 

+0.06  1 

+0.062 

+0.062 

+0.062   +0.06^ 

6.0 

.058 

.058 

•059 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

6.5 

.056 

.057 

.057 

.058 

.058 

.058 

.059 

.059 

.060 

.060 

7.0 

.055 

.056 

.056 

.056 

•057 

•057 

.057 

.058 

.058 

•059 

7-5 

.054 

.054 

•055 

•055 

•055 

.056 

.056 

.057 

•057 

•057 

8.0 

+0.053 

+0.053 

+  0.053 

+0.054 

+0.054 

+0.054 

+0.055 

+0.055 

+0.056 

+0.056 

8-5 

.051 

.052 

.052 

.052 

•053 

•053 

.053 

.054 

•054 

•055 

9.0 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

•053 

•053 

•053 

9-5 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.052 

.052 

10.0 

.047 

.048 

.048 

.048 

.049 

.049 

.050 

.050 

.050 

.051 

10.5 

1-0.046 

+0.047 

+0.047 

+0.047 

+0.048 

+0.048 

+0.048 

+0.049 

+0.049 

+  0.049 

II.  O 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.047 

.048     ; 

n-5 

.044 

.044 

.044 

•045 

•045 

•045 

.046 

.046 

.046 

.046 

12.0 

.042 

.043 

•043 

•043 

.044 

.044 

.044 

.044 

-045 

•045 

12.5 

.041 

.041 

.042 

.042 

.042 

•043 

.043      -043 

•043 

.044 

13.0 

+0.040 

+0.040 

+0.040 

+0.041 

1-0.041 

+0.041   4-0.042 

+0.042 

+0.042 

+0.042    : 

13-5 

•039 

•039 

•039 

•039 

.040 

.040  j      .040 

.040 

.041 

.041 

*4.o 

.037 

.038 

.038 

•038 

.038 

•039        -039 

•039 

-039 

.040 

14-5 

.036 

.036 

•037 

•037 

•037 

.037  I      .038 

.038 

.038 

.038    ; 

15.0 

.035 

.035 

•035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

15.5 

fo.033 

+0.034 

+0.034 

+0.034 

+0.034 

+0.035 

+0.035 

+0.035 

+0.035 

+0.036 

16.0 

.032 

.032 

•033 

•033 

•033 

•033 

.034 

.034 

•034 

•034 

16.5 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

•033 

<033 

17.0 

.030 

.030 

.030 

.030 

.030 

•031 

.031 

.031 

•031 

.032 

17-5 

.028 

.029 

.029 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

18.0 

fO.027 

+0.027 

+0.027 

+0.028 

+0.028 

+0.028 

+0.028 

+0.028 

+0.029 

+0.029 

18.5 

.026 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

19.0 

.025 

.025 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

19-5 

.023 

.023 

.024 

.024 

.024 

.024 

.024 

.024 

.025 

.025 

20.0 

.022 

.022 

.022 

.022 

.023 

.023 

.023 

.023 

.023 

.023 

! 

20.5 

+O.O2I 

+  O.O2I 

+O.O2I 

+0.021 

+O.O2I 

+O.O2I 

+O.O22 

+O.O22 

+0.022 

+0.022 

21.  0 

.019 

.O2O 

.O2O 

.O2O 

.O2O 

.O2O 

.O2O 

.020 

.021 

.021 

21-5 

.018 

.018 

.018 

.019 

.019 

.019 

.019 

.019 

.019 

.019 

22.  0 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

22.5 

.016 

.016 

.016 

.016 

.016 

.Ol6 

.016 

.Ol6 

.Ol6 

.017 

23.0 

-(-O.OI4 

+O.OI4 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

+0.015 

23-5 

•013 

•013 

.013 

.013 

.013 

.OI4 

.OI4 

.OI4 

.014 

.OI4 

24.0 

.OI2 

.012 

.012 

.012 

.012 

.OI2 

.OI2 

.012 

.OI2 

.013 

24-5 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

25.0 

.009 

.009 

.009 

.009 

.009 

.010 

.010 

.010 

.OIO 

.OIO 

SMITHSONIAN  TABLES. 


26 


TABLE   10. 

REDUCTION    OF    THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

28.  0      28.2 

28.4     28.6 

28.8 

29.O 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

-f-o.OoS 

+  0.008 

-1-0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

+0.008 

26.0 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

26.5 

.005 

.005 

.005 

.006 

.006 

.006 

.006 

.006 

.006 

.006     i 

27.0 

.004 

.004 

.004 

.OO4 

.004 

.004 

.004 

.004 

.004 

.004 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

-(-O.OO2 

+  O.OO2 

+O.OO2 

+0.002 

+0.002 

+0.002 

+0.002 

+  O.OO2 

+  O.OO2 

+O.OO2 

28.5 

O.OOO 

0.000 

O.OOO 

0.000 

0.000 

Q.OOO 

O.OOO 

O.OOO 

O.OOO 

O.OOO 

29.0 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.002 

.OO2 

.002 

.OO2 

.002 

.002 

.OO2 

.002 

30.0 

.003 

.OO4 

.OO4 

.004 

.004 

.004 

.004 

.004 

.004 

.004 

30.5 

-0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

-0.005 

—0.005 

31.0 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.OO6 

3i.5 

.007 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

.008 

.008 

32.0 

.009 

.009 

.009 

.009 

.009 

.OO9 

.009 

009 

.009 

.QP9 

32-5 

.010 

.OIO 

.010 

.010 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

33.0 

-O.OII 

—O.OII 

—O.OII 

—O.OII 

—O.OII 

—  O.OI2 

—  O.OI2 

—  O.OI2 

—  O.OI2 

—  0.012 

33-5 

.012 

.012 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

•013 

34-0 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.015 

34-5 

.015 

.015 

.015 

.015 

.015 

.015 

.016 

.016 

.016 

.Ol6 

35-0 

.016 

.016 

.016 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

35.5 

-0.017 

—0.018 

—  0.018 

—0.018 

—0.018 

—  O.OlS 

—O.OlS 

—O.OlS 

—O.OlS 

—O.OI9 

36.0 

.019 

.019 

.019 

.019 

.019 

.019 

.O2O 

.O2O 

.O2O 

.O2O 

36.5 

.020 

.020 

.020 

.020 

.021 

.O2I 

.O2I 

.O2I 

.O2I 

.021 

37-0 

.O2I 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

37-5 

.023 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024     j 

38.0 

—O.O24 

—0.024 

—0.024 

—0.024 

—0.024 

—0.025 

—0.025 

—0.025 

—0.025 

-0.025 

38.5 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

.026 

.027 

.027 

39-° 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

39-5 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

40.0 

.029 

.029 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

.031 

40.5 

—O.O3O 

-0.030 

—0.031 

-0.031 

—0.031 

—0.031 

—0.031 

-0.032 

-0.032 

-0.032 

41.0 

.031 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033 

41-5 

•033 

•033 

.033 

•033 

•034 

•034 

•034 

•034 

•035 

•035 

42.0 

•034 

•034 

.034 

•035 

.035 

•035 

•035 

.036 

.036 

.036 

42.5 

•035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

•037 

•037 

43.0 

-0.036 

-0.037 

-0.037 

-0.037 

—0.038 

-0.038 

—0.038 

—  0.038 

-0.039 

-0.039 

43-5 

.038 

.038 

.038 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

-    44.0 

•039 

•039 

.040 

.040 

.040 

.040 

.041 

.041 

.041 

.042 

44-5 

.040 

.041 

.041 

.041 

.041 

.042 

.042 

.042 

•043 

•043 

45-o 

.042 

.042 

.042 

.042 

•043 

•043 

•043 

.044 

.044 

.044 

45.5 

-0.043 

-0.043 

-0.043 

—0.044 

—0.044 

—O.O44 

-0.045 

-0.045 

—0.045 

—0.046 

46.0 

.044 

.044 

.045 

.045 

.045 

.046 

.046 

.046 

.047 

.047 

46.5 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

47.0 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

47-5 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

48.0 

-0.049 

—0.050 

—0.050 

—0.050 

—0.051 

—0.051 

-0.051 

—0.052 

—0.052 

—0.052 

48.5 

.050 

.051 

.051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

49.0 

.052 

.052 

.052 

•053 

.053 

•054 

•054 

•054 

•055 

•055 

49-5 

•053 

•053 

.054 

•054 

•054 

•055 

•055 

.056 

.056 

.056 

50.0 

•054 

.055 

•055 

.055 

.056 

.056 

•057 

•057 

.057 

.058 

SMITHSONIAN  TABLES. 


TABLE   10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN   INCHES. 

28.0 

28.2 

28.4 

28.6 

28.8 

29.O 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.055 

—0.056 

—0.056 

-0.057 

-0.057 

-0.057 

-0.058 

—0.058 

—0.059 

-0.059 

51.0 

•057 

•057 

.058 

.058 

.058 

.059 

•059 

.060 

.060 

.060 

5i-5 

.058 

.058 

•059 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

52.0 

•059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

.063 

•063 

52.5 

.061 

.061 

.061 

.062 

.062 

•063 

.063 

.064 

.064 

.064 

53.0 

-0.062 

—0.062 

—0.063 

—0.063 

—0.064 

—0.064 

—0.064 

-0.065 

—0.065 

-0.066 

53-5 

.063 

.064 

.064 

.064 

•065 

.065 

.066 

.066 

.067 

.067 

54-0 

.064 

.065 

•065 

.066 

.066 

.067 

.067 

.068 

.068 

.068 

54-5 

.066 

.066 

.067 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

55-o 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

55.5 

-0.068 

—0.069 

—0.069 

—0.070 

—0.070 

—0.071 

—0.071 

—O.O72 

—0.072 

-0.073 

56.0 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

.073 

.074 

56.5 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

•075 

57-0 

.072 

.072 

•073 

•073 

.074 

•075 

•075 

.076 

.076 

.077 

57-5 

•073 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

58.0 

-0.074 

—0.075 

—0.076 

—0.076 

-0.077 

-0.077 

—0.078 

—0.078 

-0.079 

-0.079 

58.5 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

.080 

.080 

.081 

59-0 

.077 

.078 

.078 

.079 

.079 

.080 

.080 

.O8l 

.O8l 

.082 

59-5 

.078 

.079 

.079 

.080 

.081 

.081 

.082 

.082 

•083 

.083 

60.0 

.080 

.080 

.081 

.O8l 

.082 

.082 

.083 

.084 

.084 

.085 

60.5 

—0.08  1 

—O.oSl 

—0.082 

—0.083 

—0.083 

—0.084 

—0.084 

-0.085 

-0.085 

—0.086 

61.0 

.082 

•083 

.083 

.084 

.084 

•085 

.086 

.086 

.087 

.087 

61.5 

•083 

.084 

.085 

•085 

.086 

.086 

.087 

.087 

.088 

.089 

62.0 

.085 

•085 

.086 

.086 

.087 

.088 

.088 

.089 

.089 

.090 

62.5 

.086 

.086 

.087 

.088 

.088 

.089 

.090 

.090 

.091 

.091 

63.0 

—0.087 

-0.088 

-0.088 

—0.089 

—0.090 

—0.090 

—  0.091 

—0.091 

—0.092 

-0.093 

63.5 

.088 

.089 

.090 

.090 

.091 

.092 

.092 

.093 

•093 

.094 

64.0 

.090 

.090 

.091 

.092 

.092 

•093 

•093 

.094 

•095 

•095 

64-5 

.091 

.092 

.092 

•°93 

•093 

.094 

•095 

•095 

.096 

.097 

65.0 

.092 

•°93 

•°93 

.094 

•095 

•095 

.096 

.097 

.097 

.098 

65.5 

-0.093 

-0.094 

-0.095 

-0.095 

—0.096 

-0.097 

-0.097 

—0.098 

-0.099 

-0.099 

66.0 

•095 

•095 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

66.5 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

.101 

.102 

67.0 

.097 

.098 

.099 

.099 

.100 

.101 

.101 

.102 

.103 

•103 

67.5 

.098 

.099 

.100 

.101 

.101 

.102 

.103 

.103 

.104 

.105 

68.0 

-0.100 

—  O.IOO 

—  0.  1  01 

—  0.  102 

—  o.  103 

—0.103 

—  o.  104 

—  o.  105 

—0.105 

—  0.106 

68.5 

.101 

.102 

.102 

.103 

.104 

.105 

.105 

.106 

.107 

.107 

69.0 

.102 

.103 

.104 

.104 

.105 

.106 

.107 

.107 

.108 

.109 

69-5 

.104 

.104 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.no 

70.0 

.105 

.106 

.106 

.107 

.108 

.109 

.109 

.110 

.III 

.112 

70.5 

—  0.106 

—  o.  107 

—  o.  108 

—O.IOS 

—0.109 

—O.I  10 

—O.I  II 

—  O.III 

—  O.II2 

—O.II3 

71.0 

.107 

.108 

.109 

.110 

.110 

.III 

.112 

•113 

•113 

,114 

71-5 

.109 

.109 

.110 

.III 

.112 

.112 

•113 

.114 

•115 

.116 

72.0 

.110 

.III 

.III 

.112 

•113 

.114 

•US 

.115 

.116 

.117 

72.5 

.III 

.112 

•"3 

.113 

.114 

•US 

.116 

.117 

.117 

.118 

73.0 

—O.I  12 

-O.II3 

—0.114 

-O.II5 

—  0.116 

—  0.116 

—O.II7 

—0.118 

—O.II9 

—  O.I2O 

73-5 

.114 

.114 

•  US 

.116 

.117 

.118 

.118 

.119 

.120 

.121 

74.0 

•US 

.116 

.117 

.117 

.118 

.119 

.120 

.121 

.121 

.122 

74-5 

.116 

.117 

.118 

.119 

.119 

.120 

.121 

.122 

.123 

.124 

75-0 

.117 

.118 

.119 

.I2O 

.121 

.122 

.122 

.123 

.124 

.125 

SMITHSONIAN  TABLES. 


28 


TABLE  10. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
;     heit. 

HEIGHT  OF  THE  BAROMETER   IN   INCHES. 

28.  0 

28.2 

28.4 

28  6 

28  8 

29.  0 

29.2 

29.4 

29.6 

29.8 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—0.119 

—0.119 

—O.I  2O 

—  O.I2I 

—0.122 

-0.123 

—0.124 

—0.125 

—0.125 

—0.126 

!     76.0 

.120 

.  121 

.122 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

i     76-5 

.121 

.122 

.123 

.124 

.125 

.125 

.126 

.127 

.128 

.129 

I     77-0 

.122 

.123 

.124 

.125 

.126 

.127 

.128 

.129 

.129 

.130 

77-5 

.124 

.125, 

.125 

.126 

.127 

.128 

.I29 

.130 

.131 

.132 

78.0 

—  o.  125 

—O.I26 

—0.127 

—  0.  1  28 

—0.129 

—0.129 

—0.130 

—0.131 

—0.132 

-0.133 

!   78.5 

.126 

.127 

.128 

.129 

.130 

•131 

.132 

•133 

•133 

•134 

79.0 

.127 

.128 

.129 

.130 

•*3I 

.132 

•133 

•134 

•135 

.136 

79-5 

.129 

.130 

•131 

•131 

.132 

•133 

•134 

•135 

.136 

•137 

80.0 

.130 

.131 

.132 

•J33 

.134 

.135 

.136 

.136 

.137 

.138 

80.5 

-O.I3I 

-0.132 

-0.133 

—0.134 

-0.135 

-0.136 

-0.137 

-0.138 

-0.139 

—0.140 

81.0 

.132 

•133 

•134 

•135 

.136 

•137 

.138 

•139 

.140 

.141 

81.5 

•134 

•135 

.136 

•137 

.138 

•139 

•139 

.140 

.141 

.142 

82.0 

•135 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

82.5 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

•145 

83.0 

-0.138 

-0.139 

-0.139 

—0.140 

—O.I4I 

—0.142 

-0.143 

-o.  144 

—  o.  145 

—0.146 

83-5 

•139 

.140 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

84.0 

.I4O 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

84-5 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

85.0 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

.151 

.152 

85.5 

-0.144 

-0.145 

—0.146 

-0.147 

—  o.  148 

-0.149 

—0.150 

—O.I5I 

—0.152 

-0.153 

86.0 

•145 

.146 

.147 

.148 

.149 

•  ISO 

.151 

.152 

•153 

•154 

86.5 

.146 

.147 

.148 

.149 

.151 

.152 

•153 

•154 

•155 

.156 

87.0 

.148 

.149 

.150 

•151 

.152 

•153 

•154 

•155 

.156 

•157 

87.5 

.149 

.150 

.151 

•152 

•153 

•154 

•155 

.156 

•157 

.158 

i    88.0 

—0.150 

—O.I5I 

—  o.  152 

-0.153 

-0.154 

-0.155 

-0.157 

-0.158 

-0.159 

—  o.  160 

88.5 

.151 

.152 

•154 

•155 

.156 

•157 

.158 

•!59 

.160 

.161 

89.0 

•153 

•154 

•155 

.156 

•157 

.I58 

•159 

.160 

.161 

.162 

89-5 

•154 

•155 

.156 

•  157 

.158 

•159 

.160 

.162 

.163 

.164 

90.0 

•155 

.156 

•157 

.158 

.160 

.I6l 

.162 

.163 

.164 

-165 

90.5 

—0.156 

-0.157 

—  o.  159 

—  0.  1  60 

—  0.161 

—  o.  162 

—  o.  163 

—0.164 

—O.l65 

—  o.  166 

91.0 

.158 

•159 

.160 

.161 

.162 

.163 

.I64 

.166 

.167 

.168 

9*-5 

•159 

.160 

.161 

.162 

•  163 

.165 

.166 

.167 

.168 

.169 

92.0 

.160 

.16! 

.162 

.164 

.165 

.166 

.167 

.168 

.I69 

.170 

92.5 

.l6l 

•I63 

.164 

.165 

.166 

.167 

.168 

.169 

.171 

.172 

93.0 

-0.163 

—  o.  164 

—  o.  165 

-0.166 

—0.167 

-o.  1  68 

—0.170 

—0.171 

—0.172 

-0.173 

93-5 

.164 

.165 

.166 

.167 

.169 

.170 

.171 

.172 

•173 

.174 

94.0 

.165 

.166 

.168 

.169 

.170 

.171 

.172 

•173 

•175 

.176 

94-5 

.166 

.168 

.169 

.170 

.171 

.172 

.174 

•  175 

.176 

.177 

95-o 

.168 

.169 

.170 

.171 

.172 

.174 

•175 

.176 

.177 

.178 

95.5 

—0.169 

—O.I7O 

—0.171 

-0.173 

-o.i74 

-0.175 

—0.176 

-o.i77 

-0.179 

—  o.  180 

96.0 

.170 

.171 

•  173 

.174 

•  175 

.176 

.177 

.179 

.ISO 

.181 

•    96.5 

.171 

•173 

.174 

.175 

.176 

.178 

.179 

.180 

.I8l 

.182 

'    97-o 

•173 

.174 

•  175 

.176 

.I78 

.179 

.180 

.181 

.183 

.184 

97-5 

.174 

•175 

.176 

.178 

.179 

.180 

.181 

.183 

.184 

.185 

98.0 

-0.175 

—0.176 

—0.178 

-0.179 

—0.180 

—0.181 

-0.183 

—0.184 

-0.185 

—o.i  86 

!   98.5 

.I76 

.178 

.179 

.180 

.181 

.183 

.184 

-185 

.IS7 

.188 

i    99-o 

.178 

.179 

.180 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

1    99-5 

.179 

.180 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

.190 

100.  0 

.ISO 

.182 

.183 

.184 

.185 

.187 

.188 

.189 

.191 

.192 

SMITHSONIAN  TABLES. 


29 


TABLE  10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN   INCHES. 

29.8 

3O.O 

30.2 

30.4 

30.6 

30.8 

31  .0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0?0 

-[-0.078 

4-0.078 

4-0.079 

+0.079 

+0.080 

+0.080 

+0.081 

+0.08  1 

+0.082 

+0.082 

0.5 

-f-0.076 

4-0.077 

4-0.077 

+0.078 

+0.078 

+0.079 

+0.079 

+0.080 

+0.080 

+0.081 

I.O 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

•079 

.080 

i-5 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

2.0 

.072 

•073 

•073 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

2-5 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

•0/5 

3.0 

+0.070 

4-0.070 

4-0.070 

+0.071 

+0.071 

+0.072 

+0.072 

+0.073 

+0.073 

+0.074 

3-5 

.068 

.069 

.069 

.070 

.070 

.070 

.071 

.071 

.072 

.072 

4.0 

.067 

.067 

.068 

.068 

.069 

.069 

.070 

.070 

.070 

.071 

4-5 

.065 

.066 

.066 

.067 

.067 

068 

.068 

.069 

.069 

.069 

5-0 

.064 

.065 

•065 

•  065 

.066 

.066 

.067 

.067 

.068 

.068 

5.5 

+0.063 

4-0.063 

4-0.064 

+0.064 

+0.064 

+0.065 

+0.065 

+0.066 

+0.066 

+0.067 

6.0 

.061 

.062 

.062 

•063 

.063 

•063 

.064 

.064 

.065 

.065 

6-5 

.060 

.060 

.061 

.061 

.062 

.062 

.062 

•063 

.063 

.064 

7-0 

•059 

•059 

.059 

.060 

.060 

.061 

.061 

.061 

.062 

.062 

7-5 

•057 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

.061 

8.0 

-0.056 

4-0.056 

+0.057 

+0.057 

+0.057 

+0.058 

+0.058 

+0.059 

+0.059 

+0.059 

8.5 

•055 

•055 

•055 

.056 

.056 

.056 

•057 

•057 

.058 

.058 

9.0 

•053 

•054 

•054 

•054 

•055 

.055 

•055 

.056 

.056 

.056 

9-5 

.052 

.052 

•053 

•053 

•053 

•054 

•054 

•054 

•055 

•055 

IO.O 

.051 

.051 

•  051 

.052 

.052 

.052 

•053 

•053 

•053 

•054 

10.5 

-0.049 

4-0.049 

+0.050 

+0.050 

+0.050 

+0.051 

+0.051 

+0.051 

+0.052 

+0.052 

II.  0 

.048 

.048 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

its 

.046 

.047 

.047 

.047 

.048 

.048 

.048 

.049 

.049 

.049 

12.0 

.045 

•045 

.046 

.046 

.046 

.047 

.047 

.047 

.048 

.048    ! 

12-5 

.044 

.044 

.044 

•045 

•045 

•045 

•045 

.046 

.046 

.046    i 

13.0 

LO.O42 

4-0.043 

+0.043 

+0.043 

+0.044 

+0.044 

+0.044 

+0.044 

+0.045 

+0.045 

13-5 

.041 

.041 

.042 

.042 

.042 

.042 

•043 

•043 

•043 

•043 

14.0 

.040 

.040 

.040 

.040 

.041 

.041 

.041 

.042 

.042 

.042 

14-5 

.038 

•039 

•039 

•039 

•039 

.040 

.040 

.040 

.040 

.041     i 

15-0 

.037 

•037 

•037 

.038 

.038 

.038 

.038 

•039 

•039 

•039 

15.5 

4-0.036 

4-0.036 

+0.036 

+0.036 

+0.037 

+0.037 

+0.037 

+0.037 

+0.037 

+0.038 

16.0 

.034 

•034 

•035 

•035 

.035 

•035 

.036 

.036 

.036 

.036 

16.5 

.033 

•033 

•033 

•034 

•034 

•034 

.034 

•034 

•035 

•035     I 

17.0 

.032 

.032 

.032 

.032 

.032 

•033 

•033 

•033 

•033 

•033     ! 

17-5 

.030 

.030 

.031 

.031 

.031 

.031 

.031 

.032 

.032 

.032     , 

18.0 

4-0.029 

4-O.O29 

+0.029 

+0.029 

+0.030 

+0.030 

+0.030 

+0.030 

+0.030 

+0.031 

18.5 

.027 

.028 

.028 

.028 

.028 

.028 

.029 

.029 

.029 

.029     ! 

19.0 

.026 

.026 

.026 

.027 

.027 

.027 

.027 

.027 

.027 

.028     1 

19-5 

.025 

.025 

.025 

.025 

.025 

.026 

.026 

.026 

.026 

.026          : 

20.  o 

.023 

.024 

.024 

.024 

.024 

.024 

.024 

.024 

.025 

•025    ; 

20.5 

4-0.022 

4-O.O22 

+O.O22 

+0.022 

+0.023 

+0.023 

+0.023 

+0.023 

+0.023 

+0.023      : 

2I.O 

.O2I 

.021 

.021 

.021 

.021 

.021 

.022 

.022 

.022 

.022 

21.5 

.OI9 

.019 

.020 

.020 

.020 

.020 

.O2O 

.O2O 

.020 

.020     \ 

22.0 

.018 

.018 

.018 

.018 

.018 

.019 

.OI9 

.OI9 

.019 

.019     , 

22.5 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.017 

.018 

23.0 

fo.ois 

4-0.015 

+0.015 

+0.016 

+0.016 

+O.OI6 

+0.016 

+0.016 

+0.016 

+0.016 

23-5 

.014 

.014 

.014 

.014 

.014 

.014 

.014 

.015 

.015 

.015 

24.0 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

.013 

24-5 

.Oil 

.Oil 

.Oil 

.Oil 

.on 

.OI2 

.012 

.012 

.012 

.012 

25.0 

.010 

.010 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

.OIO 

o.  10 

.010 

SMITHSONIAN  TABLES. 


TABLE  10, 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN   INCHES. 

29.8 

30.0 

30.2 

30.4 

3O.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

25?5 

+-0.008 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

+0.009 

26.0 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

.008 

.008 

26.5 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

.006 

27.0 

.004 

.004 

.004 

.005 

.005 

.005 

.005 

.005 

.005 

.005 

27-5 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

.003 

28.0 

+O.OO2 

+  O.OO2 

+0.002 

+O.OO2 

+O.OO2 

+O.OO2 

+O.OO2 

+O.OO2 

+0.002 

+0.002 

28.5 

O.OOO 

0.000 

0.000 

O.OOO 

O.OOO 

0.000 

0.000 

0.000 

0.000 

0.000 

29.0 

—  0.001 

—  0.001 

—  0.001 

—  O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

—O.OOI 

29-5 

.002 

.002 

.OO2 

.002 

.002 

.002 

.002 

.002 

.OO2 

.002 

30.0 

.OO4 

.OO4 

.004 

.004 

.004 

.OO4 

.OO4 

.004 

.OO4 

.004 

30.5 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

—0.005 

31-0 

.006 

.006 

.006 

.007 

.007 

.007 

.007 

.007 

.007 

.007 

31-5 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

.008 

32.0 

.009 

.009 

.009 

.009 

.009 

.009 

.009 

.010 

.OIO 

.010 

32.5 

.OIO 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.Oil 

.on 

.Oil 

33.0 

—  O.OI2 

—0.012 

—0.012 

—0.012 

—  O.OI2 

—  O.OI2 

—  O.OI2 

—  O.OI2 

—  0.012 

—0.013 

33-5 

.013 

.013 

.013 

.013 

.OI4 

.OI4 

.OI4 

.OI4 

.014 

.014 

34-0 

.015 

.015 

.015 

.015 

.015 

•015 

•015 

.015 

•015 

.015 

34-5 

.016 

.016 

.Ol6 

.Ol6 

.016 

.016 

.017 

.017 

.017 

.017 

35-0 

.017 

.017 

.017 

.018 

.018 

.018 

.018 

.018 

.018 

.018 

35.5 

—O.OI9 

—O.OI9 

—O.OI9 

—0.019 

—0.019 

—O.OI9 

—O.OI9 

—O.Oig 

—  O.O2O 

—0.020 

36.0 

.O2O 

.O2O 

.O2O 

.020 

.O2O 

.O2I 

.O2I 

.O2I 

.021 

.021 

36.5 

.021 

.021 

.022 

.022 

.022 

.022 

.022 

.022 

.022 

.023 

37-0 

.023 

.023 

.023 

.023 

.023 

.023 

.024 

.024 

.024 

.024 

37-5 

.024 

.024 

.024 

.024 

.025 

.025 

.02.5 

•025 

.025 

.025 

38.0 

—0.025 

—0.026 

—O.O26 

—O.O26 

—0.026 

—0.026 

—0.026 

—0.027 

—O.O27 

—  0.027 

38.5 

.027 

.027 

.027 

.027 

.027 

.028 

.028 

.028 

.028 

.028 

39-o 

.028 

.028 

.028 

.029 

.029 

.029 

.029 

.029 

.030 

.030 

39-5 

.029 

.030 

.030 

.030 

.030 

.030 

.031 

.031 

.031 

.031 

40.0 

.031 

.031 

.031 

.031 

.032 

.032 

.032 

.032 

.032 

•033 

40.5 

—O.O32 

-0.032. 

-0.033 

-0.033 

-0.033 

-0.033 

-0.033 

-0.034 

-0.034 

-0.034 

41.0 

•033 

•034 

•034 

•034 

•034 

•035 

.035 

•035 

•035 

•035 

41-5 

•035 

•035 

•035 

•035 

.036 

.036 

.036 

.036 

•037 

•037 

42.0 

.036 

.036 

•037 

•037 

•037 

•037 

.038 

.038 

.038 

.038 

42.5 

•037 

.038 

.038 

.038 

.038 

•039 

•039 

•°39 

.040 

.040 

43.0 

-0.039 

-0.039 

-0.039 

—0.040 

—O.O4O 

—O.O4O 

—0.040 

—O.O4I 

—0.041 

—0.041 

43-5 

.040 

.040 

.O4I 

.O4I 

.O4I 

.042 

.042 

.042 

.042 

•043 

44.0 

.042 

.042 

.042 

.042 

•043 

•043 

.043 

•043 

.044 

.044 

44-5 

•043 

•043 

•043 

.044 

.044 

.044 

.045 

•045 

•045 

.045 

45-0 

.044 

•045 

•045 

•045 

•045 

.046 

.046 

.046 

.047 

.047 

45.5 

—0.046 

—0.046 

—0.046 

-0.047 

-0.047 

-0.047 

-0.047 

—0.048 

—0.048 

—0.048 

46.0 

.047 

.047 

.048 

.048 

.048 

•049 

.049 

.049 

.049 

.050 

46.5 

.048 

.049 

.049 

.049 

.050 

.050 

.050 

.051 

.051 

.051 

47.0 

.050 

.050 

.050 

.051 

.051 

.051 

.052 

.052 

.052 

•053 

47.5 

.051 

.051 

.052 

.052 

.052 

•053 

.053 

•053 

•054 

.054 

48.0 

-0.052 

-0.053 

-0.053 

-0.053 

-0.054 

-0.054 

-0.054 

-0.055 

-0.055 

-0.055 

48.5 

•054 

•054 

•054 

•055 

.055 

•055 

.056 

.056 

.057 

.057 

49-0 
49-5 

•055 
.056 

•055 
•057 

.056 
•057 

.056 
.058 

.057 
.058 

is 

.057 
.059 

.058 
•059 

.058 
•059 

.058 
.060 

50.0 

.058 

.058 

.058 

•059 

•059 

.060 

.060 

.060 

.061 

.061 

SMITHSONIAN  TABLES. 


TABLE  10 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER   IN   INCHES. 

29.8 

30.0 

30.2 

30.4 

30.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

50?5 

-0.059 

-0.059 

—0.060 

—0.060 

—O.o6  1 

—  0.061 

—O.o6  1 

—0.062 

—0.062 

—0.063 

51.0 

.060 

.061 

.061 

.062 

.062 

.062 

.063 

•063 

.064 

.064 

5i-5 

.062 

.062 

.063 

•063 

.063 

.064 

.064 

.065 

•065 

•065 

52.0 

.063 

.064 

.064 

.064 

.065 

-065 

.066 

.066 

.066 

.067 

52-5 

.064 

•065 

•  065 

.066 

.066 

.067 

.067 

.067 

.068 

.068 

53.0 

—O.O66 

—0.066 

—0.067 

—0,067 

-0.068 

-0.068 

-0.068 

—0.069 

—0.069 

—0.070 

535 

.067 

.068 

.     .068 

-     .069 

.069 

.069 

.070 

.070 

.071 

.071 

1    54-0 

.068 

.069 

.069 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

,    54-5 

.070 

.070 

.071 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

55-o 

.071 

.072 

.072 

•073 

•073 

.074 

.074 

•075 

•075 

•075 

55.5 

—0.073 

—0.073 

—0.074 

-0.074 

—0.074 

-0.075 

-0.075 

—0.076 

—0.076 

-0.077 

56.0 

.074 

.074 

•075 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

56.5 

•075 

.076 

.076 

.077 

.077 

.078 

.078 

.079 

.079 

.080 

57-o 

.077 

.077 

.078 

.078 

.079 

.079 

.080 

.080 

.O8l 

.081 

57-5 

.078 

.078 

.079 

.079 

.080 

.081 

.O8l 

.082 

.082 

.083 

58.0 

—0.079 

—0.080 

—  •  0.080 

—0.081 

—O.oSl 

—O.o82 

—0.082 

—0.083 

—0.084 

—0.084 

58.5 

.081 

.081 

.082 

.082 

.083 

•083 

.084 

.084 

•085 

.085 

59-° 

.082 

.083 

•083 

.084 

.084 

.085 

•085 

.086 

.086 

.087 

59-5 

.083 

•      .084 

.084 

•085 

.086 

.086 

.087 

.087 

.088 

.088 

60.0 

.085 

.085 

.086 

.086 

.087 

.087 

.088 

.089 

.089 

.090 

60.5 

—0.086 

—0.087 

—0.087 

—O.o88 

—0.088 

—0.089 

—0.089 

—0.090 

—0.091 

—0.09«I 

61.0 

.087 

.088 

.089 

.089 

.090 

.090 

.091 

.091 

.092 

•093 

61.5 

.089 

.089 

.090 

.090 

.091 

.092 

.092 

•093 

•093 

.094 

62.0 

.090 

.091 

.091 

.092 

.092 

•093 

.094 

.094 

•095 

•095 

62.5 

.091 

.092 

•093 

•093 

.094 

.094 

•095 

.096 

.096 

.097 

63.0 

-0.093 

-0.093 

—0.094 

-0.095 

-0.095 

—0.096 

—0.096 

-0.097 

—0.098 

-0.098 

63-5 

.094 

.095 

•095 

.096 

.097 

.097 

.098 

.098 

.099 

.IOO 

64.0 

•095 

.096 

.097 

.097 

.098 

.099 

.099 

.100 

.IOI 

.101 

64-5 

.097 

.097 

.098 

.099 

.099 

.100 

.101 

.IOI 

.IO2 

.103 

65.0 

.098 

.099 

.099 

.100 

.101 

.101 

.102 

.103 

.103 

.104 

65.5 

-0.099 

—  O.  IOO 

—  O.IOI 

—O.IOI 

—0.  102 

—  o.  103 

—o.  103 

—  o.  104 

—  o.  105 

—  o.  105 

66.0 

.IOI 

.101 

.102 

.103 

.103 

.104 

.105 

.106 

.106 

.107 

66.5 

.IO2 

.103 

.103 

.104 

.105 

.106 

.106 

.107 

.108 

.108 

67.0 

.103 

.104 

•105 

.106 

.106 

.107 

.108 

.108 

.109 

.no 

67.5 

.105 

.106 

.106 

.107 

.108 

.108 

.109 

.no 

.110 

.in 

68.0 

—  o.  106 

—  o.  107 

-0.108 

-0.108 

—  o.  109 

—O.I  10 

—O.I  10 

—  O.  Ill 

—O.I  12 

-0.113 

68.5 

.107 

.108 

.109 

.110 

.no 

.III 

.112 

•  113 

•113 

.114 

69.0 

.109 

.110 

.110 

.III 

.112 

.112 

v«3 

.114 

•US 

•US 

69-5 

.110 

.III 

.112 

.112 

•113 

.114 

•  115 

•  US 

.116 

.117 

70.0 

.112 

.112 

•113 

.114 

•US 

•US 

.116 

.117 

.117 

.118 

70.5 

-O.II3 

—O.II4 

—O.II4 

—O.II5 

—  0.116 

—O.II7 

—0.117 

-o.nS 

—O.II9 

—0.120 

71.0 

.114 

•US 

.116 

.116 

.117 

.118 

.119 

.120 

.120 

.121 

7i.5 

.116 

.116 

.117 

.118 

.119 

.119 

.120 

.121 

.122 

.123 

72.0 

.117 

.118 

.118 

.II9 

.120 

.121 

.122 

.122 

.123 

.124 

72.5 

.118 

.119 

.I2O 

.121 

.121 

.122 

.123 

.124 

•125 

•  125 

73.0 

-0.120 

—O.I  2O 

—  O.I2I 

—0.122 

—0.123 

—0.124 

—0.124 

-0.125 

—0.126 

—0.127 

73-5 

.121 

.122 

.123 

.123 

.124 

•125 

.126 

.127 

.127 

.128 

74.0 

.122 

.123 

.124 

.125 

.126 

.126 

.127 

.128 

.129 

.130 

!'   74-5 

.124 

.124 

.125 

.126 

.127 

.128 

.129 

.129 

.130 

.131 

75-o 

.125 

.126 

.127 

.127 

.128 

.129 

.130 

•131 

.132 

.132 

SMITHSONIAN  TABLES. 


TABLE   10. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

ENGLISH    MEASURES. 


Attached 
Ther- 
mometer 
Fahren- 
heit. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

29.8 

30.0 

30.2 

30.4 

3O.6 

30.8 

31.0 

31.2 

31.4 

31.6 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

75?5 

—O.I26 

—0.127 

—0.128 

—0.129 

—0.130 

—0.131 

-0.131 

—0.132 

-0.133 

-0.134 

76.0 

.128 

.128 

.129 

.130 

.131 

.132 

•133 

•134 

•134 

•!35 

76.5 

.129 

.130 

.131 

.132 

.132 

•133 

•134 

•135 

.136 

.  -*37 

77.0 

.130 

.131 

.132 

•133 

•134 

•135 

.136 

.136 

•137 

.138 

77-5 

.132 

•133 

.133 

•134 

•135 

.136 

•137 

.138 

•139 

.140 

78.0 

-0.133 

-0.134 

-0.135 

-0.136 

-0.137 

-0.137 

-0.138 

-0.139 

—  o.  140 

—0.141 

78.5 

•134 

•135 

.136 

•137 

.138 

•139 

.140 

.141 

.142 

.142 

79.0 

.136 

•137 

•137 

.138 

•139 

.140 

.141 

.142 

•  143 

.144 

79-5 

•137 

.138 

•139 

.140 

.141 

.142 

•143 

•143 

.144 

•145 

80.0 

.138 

•139 

.140 

.141 

.142 

•143 

.144 

•145 

.146 

.147 

80.5 

—  o.  140 

—0.141 

—  o.  142 

—0.142 

-o.  143 

-0.144' 

-0.145 

—  o.  146 

-0.147 

—0.148 

81.0 

.141 

.142 

•143 

.144 

•  145 

.146 

.147 

.148 

.149 

•150 

81.5 

.142 

•143 

.144 

•145 

.146 

.147 

.148 

.149 

.150 

•151 

82.0 

.144 

•145 

.146 

.147 

.148 

.149 

.149 

•ISO 

.151 

•152 

82.5 

•145 

.146 

.147 

.148 

.149 

.150 

•151 

.152 

.153 

•154 

83.0 

—  o.  146 

-0.147 

—  0.148 

-o.  149 

—0.150 

—O.I5I 

-0.152 

-0-153 

-0.154 

-0.155 

83-5 

.148 

.149 

.150 

.151 

.152 

•153 

•154 

•155 

.156 

•157 

84.0 

.149 

.  -ISO 

.151 

.152 

•  153 

•154 

•155 

.156 

.157 

.158 

84-5 

.150 

.151 

•152 

.153 

.154 

•155 

.156 

•157 

.158 

•159 

85.0 

.152 

•153 

•154 

•  155 

.156 

•157 

.158 

•159 

.160 

.161 

85.5 

-0.153 

-0.154 

-0.155 

-0.156 

-0.157 

—0.158 

-0.159 

—  o.  160 

—  o.  161 

—0.162 

86.0 

.154 

•155 

.156 

.158 

.159 

.160 

.161 

.162 

.163 

.164 

86.5 

.156 

•157 

.158 

.159 

.160 

.l6l 

.16-2 

.163 

.164 

•165 

87.0 

.157 

.158 

•159 

.160 

.161 

.162 

•163 

.164 

.166 

.167 

87.5 

.158 

•!59 

.161 

.162 

.163 

.164 

.165 

.166 

.167 

.168 

88.0 

—O.I  60 

—  0.161 

—O.l62 

—0.163 

—0.164 

-0.165 

—  o.  166 

—0.167 

-o.i  68 

—  o.  169 

88.5 

.161 

.162 

.163 

.164 

.165 

.166 

.168 

.169 

.170 

.171  ! 

89.0 

.162 

.164 

.165 

.166 

.167 

.168 

.169 

.170 

.171 

.172 

89.5 

.164 

.165 

.166 

.167 

.168 

.169 

.170 

.171 

•  173 

.174 

90.0 

.165 

.166 

.167 

.168 

;i7o 

.171 

.172 

•173 

.174 

•175 

90.5 

-0.166 

-0.168 

—0.169 

—0.170 

—0.171 

—0.172 

-0.173 

-0.174 

-0.175 

—0.176 

91.0 

.168 

.169 

.170 

.171 

.172 

•173 

•175 

.176 

.177 

.178 

9i-5 

.169 

.170 

.171 

.173 

•1/4 

•175 

.176 

.177 

.178 

.179 

92.0 

.170 

.172 

.173 

.174 

•175 

.176 

.177 

.178 

.180 

.181 

92-5 

.172 

•173 

.174 

.175 

.176 

.178 

.179 

.180 

.181 

.182 

93.0 

-0.173 

-0.174 

-0.175 

-0.177 

-0.178 

-0.179 

—0.180 

—0.181 

—0.182 

—0.184 

93-5 

.174 

.176 

.177 

.178 

.179 

.ISO 

.181 

.183 

.184 

.185 

94.0 

.176 

.177 

.178 

.179 

.180 

.182 

.183 

.184 

.185 

.186 

94-5 

.177 

.178 

.179 

.181 

.182 

.183 

.184 

.185 

.!87 

.188 

95-0 

.178 

.180 

.l8l 

.182 

.183 

.184 

.186 

.187 

.188 

.189 

95.5 

-0.180 

—0.181 

—O.l82 

-0.183 

—0.185 

—o.i  86 

-0.187 

-o.iSS 

—0.189 

—0.191 

96.0 

.181 

.182 

.184 

.185 

.186 

.187 

.188 

.190 

.191 

.192 

96-5 

.182 

.184 

.185 

.186 

.187 

.189 

.190 

.191 

.192 

•!93 

97.0 

.184 

.185 

.186 

.187 

.189 

.190 

.191 

.192 

.194 

•!95 

97-5 

.185 

.186 

.188 

.189 

.190 

.191 

•193 

.194 

.195 

.196 

98.0 

-0.186 

-0.188 

-o.  189 

—0.190 

—0.191 

-o.  193 

-0.194 

-o.  195 

—0.196 

-o.  198 

98-5 

.188 

.189 

.190 

.192 

•193 

•194 

•  195 

.197 

.198 

.199 

99.0 

.189 

.190 

.192 

.193 

.194 

•J95 

.197 

.198 

.199 

.201 

99-5 

.190 

.192 

•J93 

.194 

.196 

.197 

.198 

.199 

.201 

.202 

IOO.O 

.192 

•193 

.194 

.196 

.197 

.198 

.200 

.201 

.202 

.203 

SMITHSONIAN  TABLES. 


33 


IfABLE   11. 

REDUCTION    OF  THE    BAROMETER   TO   STANDARD  TEMPERATURE 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  TO  BE  SUBTRACTED. 


Attached 
Ther- 
momete 
Centi- 
grade. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

44O 

450 

460 

47O 

48O 

49O 

50O 

510 

52O 

530    540    550    560 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm.      mm. 

nun.  '   mm. 

oro 

O.OO 

0.00 

O.OO 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

O.OO      O.OO 

0.00      0.00 

o-5 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04 

.04       .04 

.04 

•05 

I.O 

.07 

.07 

.08 

.08 

.08 

.08 

.08 

.08 

.08 

.09 

.09 

.09 

.09 

i-5 

.11 

.11 

.11 

.12 

.12 

.12 

.12 

.12 

•13 

•  13 

•13 

•13 

.14 

2.O 

.14 

.15 

.15 

•15 

.16 

.16 

.16 

•17 

•17 

•  17 

.18 

.18 

.18 

2.5 

0.18 

0.18 

0.19 

O.ig 

O.2O 

O.2O 

O.2O 

O.2I 

O.2I 

O.22 

0.22 

O.22 

0.23 

3-o 

.22 

.22 

•23 

•23 

.24 

.24 

•24 

•25 

•25 

.26 

.26 

.27 

.27 

3-5 

•25 

.26 

.26 

•27 

..27 

.28 

•29 

.29 

•30 

•30 

•31 

•31 

•32 

4.0 

.29 

.29 

•30 

•31 

•31 

•32 

•33 

•33 

•34 

•35       -35       -36 

•37 

4-5 

•3.2 

•33 

•34 

•35 

•35 

•36 

•37 

•37 

•38 

•39 

.40 

.40 

.41 

5.0 

0.36 

0.37 

0.38 

0.38 

0-39 

0.40 

0.41     0.42 

0.42 

0.43 

0.44 

o-45 

0.46 

5-5 

.40 

.40 

.41 

•42 

•43 

•44 

•45 

.46 

•  47 

.48 

48 

•49      -50 

6.0 

•43 

•44 

•45 

.46 

•47 

•48 

•49 

•  50 

•51 

•52 

•53 

•54      -55 

6-5 

•47 

.48 

•49 

•  50 

•5i 

•52 

•53 

•54 

•55 

•56 

•57 

.58 

•59 

7.0 

•50 

•5i 

•53 

•54 

•55 

•56 

•57 

.58 

•59 

.61 

.62 

•63 

.64 

7.5 

0-54  !  0.55 

0.56 

0.58 

0-59 

0.60 

0.61 

0.62 

0.64 

0.65 

0.66 

0.67 

0.69 

80 

•57 

•59 

.60 

.61 

•63 

.64 

•  65 

.67 

.68 

.69 

.70 

.72 

•73 

8-5 

.61 

.62 

-64 

•65 

•67 

.68 

.69 

•7i 

•72 

•73 

•75 

.76 

•78 

9.0 

•65 

.66 

.68 

.69 

.70 

•72 

•  73 

•75 

•76 

.78 

•79 

.81 

.82 

9-5 

.68 

.70 

•7i 

•73 

•74 

•76 

•  77 

•79 

.81       .82 

.84 

•  85 

•87 

10.0 

0.72 

0-73 

0-75 

0.77 

0.78 

0.80 

0.82 

0.83 

0.85     0.86 

0.88 

0.90 

0.91 

10.5 

•75 

•  77 

•79 

.80 

.82 

.84 

.86 

.87 

.89 

.91 

.92 

•94 

•96 

II.  0 

•79 

.81 

•83 

.84 

.86 

.88 

.90 

.91 

•93 

•95 

•97  1     -99 

I.OO 

ii.  5 

•83 

.84 

.86 

.88 

.90 

.92 

•94 

.96 

.98 

•99 

i.  01     1.03 

1.05 

12.0 

.86 

.88 

.90 

.92 

•94 

.96 

.98 

I.OO 

1.02       1.04 

i.  06  j  i.  08 

1.  10 

' 

13.0 

093 

0-95 

0.97 

1.  00 

1.02 

1.04 

i.  06 

.08 

1.  10       1.  12 

1.14 

•17 

.19 

14.0 

1.  00 

1.03 

1.05 

1.07 

1.  10 

1.  12 

1.14 

.16 

.19 

1.  21 

1.23 

•25 

.28 

15-0 

1.08 

1.  10 

1.  12 

I-I5 

I.I7 

1.20 

1.22 

•25 

.27 

•30 

1.32 

•34 

•37 

i6.p 

I.I5 

1.17 

1.  2O 

1.23 

1-25 

1.28 

•30 

•33 

•36 

•38 

1.41 

•43 

.46 

l-ft) 

1.22 

T-25 

1.27 

1.30     i-33 

1.36 

•38 

.41 

•44 

•47 

1.50 

•52 

•55 

18.0 

1.29 

1.32 

•35 

1.38 

I.4I 

1.44 

•47 

•50 

•52 

•55 

1-58 

1.61 

1.64 

19.0 

1.36 

i-39 

.42 

i-45 

1.49 

1.52 

•  55 

-58 

1.61 

.64 

1.67 

1.70 

i-73 

20.  o 

1-43 

1.47 

•50 

i-53 

1.56 

1.  60 

•63 

.66 

.69 

•73 

1.76 

1.79 

1.82 

21.  0 

1.50 

i-54 

•57 

1.61 

1.64 

1.67 

1.71 

1.74 

1.78 

1.81 

1.85     1.88 

1.91 

22.  0 

1-58 

1.61 

•65 

1.68 

1.72 

1-75 

•79 

1-83 

1.86 

1.90 

1.93     1.97 

2.OI 

230 

1.65 

1.68 

.72 

1.76 

1.  80 

1.83 

1.87 

1.91 

1-95 

1.98 

2.  02      2.O6 

2.IO 

24.0 

1.72 

1.76 

.80 

1.84     1.87 

1.91 

i-95 

1.99 

2.03 

2.07 

2.II   !    2.15 

2.19 

25.0 

1.79 

1.83 

.87 

1.91     1.95 

1.99 

2.03 

2.07 

2.  II 

2.16 

2.  2O      2.24 

2.28 

26.0 

1.86 

1.90 

•95 

1.99 

2.03 

2.07 

2.  II 

2.16 

2.20 

2.24 

2.28      2.33 

2.37 

27.0 

1-93 

1.98 

2.02 

2.06 

2.  II 

2.15 

2.  2O 

2.24 

2.28 

2-33 

2.37      2.41 

2.46 

28.0 

2.00 

2.05 

2.09 

2.14  j  2.18 

2-23 

2.28 

2.32 

2-37 

2.41 

2.46       2.50 

2-55 

29.0 

2.07 

2.12 

2.17 

2.22 

2.26 

2.31 

2.36 

2.40  I  2.45 

2.50 

2".  55 

2-59 

2.64 

30.0 

2.15 

2.19 

2.24 

2.29 

2-34 

2-39 

2-44 

2-49     -54 

'-58 

2-63 

2.68 

2-73 

31.0 

2.22 

2.27 

2.32 

2-37 

2.42 

2.47 

2-52 

2.57      2.62      2.67 

2.72 

2-77 

2.82 

32.0 

2.29 

2-34 

2-39 

2.44 

2.50 

2-55 

2.60 

2.65 

2.70      2//6 

2.81 

286 

2.91 

33.0 

2.36 

2.41 

2.47 

2.52 

2.57 

2.63 

2.68 

2-73 

2.79      2.84 

2.89 

2.95 

3.00 

34-0 

2-43 

2.48 

2-54 

2.60 

2.65 

2.71 

2.76 

2.82 

2.87 

2-93 

2.98 

3-04 

3-°9 

35-0 

2-50 

2-55 

2.61 

2.67 

2-73 

2.78 

2.84 

2.90 

2.96 

3.01 

.3-07 

3-13 

3-i8 

1 



SMITHSONIAN  TABLE* 


TABLE   11, 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


Attached 
Ther- 
mometer. 

HEIGHT    OF   THE   BAROMETER 

560  mm. 

HEIGHT   OP  THE   BAROMETER 

570  mm. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.04 

0.05 

0.07 

0.00 

0.02 

0.04 

O.o6 

0.07 

i 

.09 

.11 

•13 

•15 

.16 

.09 

.11 

•13 

•15 

•17 

2 

.18 

.20 

.22 

.24 

.26 

•19 

.20 

.22 

.24 

.26 

3 

.27 

.29 

•31 

•33 

•35 

.28 

.30 

•32 

•34 

•35 

4 

•37 

•38 

.40 

.42 

•44 

•37 

•39 

.41 

•43 

•45 

5 

0.46 

0.48 

0.49 

0.51 

0.53 

0.47 

0.48 

0.50 

0.52 

o.54 

6 

•55 

•57 

•58 

.60 

.62 

•56 

•58 

.60 

.61 

•63 

7 

.64 

.66 

.68 

.69 

•71 

•65 

.67 

.69 

•  71 

•73 

8 

•73 

•75 

•  77 

•79 

.80 

•74 

•76 

.78 

.80 

.82 

9 

.82 

•  84 

.86 

.88 

.90 

.84 

.86 

•87 

.89 

•91 

10 

0.91 

°-93 

0-95 

0.97 

0.99 

o-93 

0-95 

0.97 

0.99 

.00 

ii 

1.  00 

1.02 

1.04 

1.06 

1.  08 

1.02 

1.04 

1.  06 

i.  08 

.10 

12 

1.  10 

I.  II 

*-*3 

I-I5 

1.17 

1.  12 

I-I3 

I-I5 

1.17 

.19 

13 

1.19 

1.20 

1.22 

1.24 

1.26 

1.  21 

1.23 

1.25 

1.26 

.28 

14 

1.28 

1.30 

I-3I 

1-33 

1-35 

1.30 

1.32 

i-34 

1.36 

•37 

15 

i-37 

T-39 

I.4I 

1,42 

1.44 

1-39 

1.41 

i-43 

i.45 

•47 

16 

1.46 

1.48 

1-50 

1-51 

i-53 

1.49 

1.50 

1.52 

1-54 

•56 

17 

1-55 

1-57 

i-59 

1.61 

1.62 

1.58 

i.  60 

1.62 

1.63 

•65 

!      18 

1.64 

1.66 

1.68 

1.70 

1.71 

1.67 

1.69 

•71 

i-73 

•75 

19 

1-73 

1-75 

1.77 

1-79 

1.81 

I.76 

1.78 

.80 

1.82 

1.84 

20 

1.82 

1.84 

1.86 

1.88 

1.90 

1.86 

1.87 

.89 

1.91 

i-93 

21 

1.91 

1-93 

i-95 

1.97 

1.99 

i-95 

1.97 

•99 

2.00 

2.02 

22 

2.01 

2.02 

2.04 

2.06 

2.08 

2.04 

2.06 

2.08 

2.10 

2.  II 

23 

2.10 

2.  II 

2.13 

2.15 

2.17 

2.13 

2-15 

2.17 

2.19 

2.21 

24 

2.19 

2.  2O 

2.22 

2.24 

2.26 

2.23 

2.24 

2.26 

2.28 

2.30 

25 

2.28 

2.30 

2.31 

2-33 

2-35 

2.32 

2-34 

2-35 

2.37 

2-39 

26 

2-37 

2-39 

2.4O 

2.42 

2.44 

2.41 

2-43 

2.45 

247 

2.48 

27 

2.46 

2.48 

2.49 

2.51 

2-53 

2.50 

2.52 

2.54 

2.56 

2.58 

28 

2-55 

2-57 

2-59 

2.60 

2.62 

2-59 

2.61 

2.63 

2.05 

2.67 

29 

2.64 

2.66 

2.68 

2.69 

2.71 

2.69 

2.71 

2.72 

2-74 

2.76 

30 

2-73 

2-75 

2-77 

2.78 

2.80 

2.78 

2.80 

2.82 

2.83 

2.85 

3i 

2,82 

2.84 

2.86 

2.87 

2.89 

2.87 

2.89 

2.91 

2-93 

2.94 

32 

2.91 

2-93 

2-95 

2.97 

2.98 

2.96 

2.98 

3.00 

3.02 

3-04 

33 

3.00 

3.02 

3-04 

3-o6 

3-07 

3-o6 

3-07 

3-09 

3-n 

3-13 

34 

3-09 

3-H 

3-13 

3-15 

3-16 

3-J5 

3-17 

3.18 

3-20 

3-22 

35 

3-i8 

3-20 

3-22 

3-24 

3-25 

3-24 

3-26 

3.28 

3.29 

3-31 

SMITHSONWN  TABLES. 


35 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

580  mm. 

HEIGHT    OF   THE   BAROMETER 

590  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.04 

0.06 

0.08 

O.OO 

O.O2 

0.04 

O.o6 

O.o8     i 

i 

.09 

.11 

•13 

•15 

•17 

.10 

.12 

•13 

•15 

.17     ! 

2 

•19 

.21 

•23 

-25 

.27 

.19 

.21 

•23 

•25 

.27  i 

3 

'.28 

•30 

•32 

•34 

.36 

.29 

•31 

•33 

•35 

•37 

4 

.38 

.40 

.42 

•44 

•45 

•39 

.40 

.42 

-44 

.46  : 

5 

0.47 

0.49 

0.51 

0-53 

0-55 

0.48 

0.50 

0.52 

0-54 

0.56  ; 

6 

•  57 

•59 

.61 

.62 

.64 

•58 

.60 

.62 

.64 

•65 

7 

.66 

.68 

.70 

•72 

•  74 

•67 

.69 

•  7i 

•73 

•75    i 

8 

.76 

.78 

•79 

.81 

•83 

•  77 

•79 

.81 

•83 

.85    i 

9 

•  85 

.87 

•89 

.91 

•93 

•87 

.89 

.90 

.92 

•94     : 

10 

0-95 

0.96 

0.98 

I.OO 

i.  02 

0.96 

0.98 

I.OO 

.02 

.04  1 

ii 

1.04 

.06 

i.  08 

I.IO 

1.  12 

i.  06 

i.  08 

I.IO 

.12 

•14    ! 

12 

M3 

•15 

1.17 

1.19 

1.  21 

•15 

1.17 

1.19 

.21 

.23    ; 

*3 

1.23 

•25 

1.27 

1.29 

1.30 

.25 

1.27 

1.29 

•31 

•33    ; 

14 

1.32 

•34 

1.36 

1.38 

I.4O 

•35 

i-37 

1.38 

.40 

.42 

15 

1.42 

•44 

1.46 

Mf 

1.49 

•44 

1.46 

1.48 

•50 

•52 

16 

1-51 

•53 

1-55 

i-57 

i-59 

•  54 

1.56 

1.58 

.60 

.61    ( 

17 

1.61 

.62 

1.64 

1.66 

1.68 

•63 

1.65 

1.67 

.69 

•  7i 

18 

1.70 

.72 

1.74 

1.76 

1.78 

•73 

1-75 

1.77 

1.79 

,81 

19 

J-79 

.81 

1.83 

1.85 

1.87 

•83 

1.84 

1.86 

1.88 

•90 

20 

1.89 

1.91 

i-93 

i-95 

1.96 

1.92 

1.94 

1.96 

1.98 

2*00 

21 

i  98 

2.00 

2.02 

2.04 

2.06 

2.  02 

2.04 

2.06 

2.07 

2.  eg    I 

22 

2.08 

2.10 

2.  II 

2.13 

2.15 

2.  II 

2.13 

2.15 

2.17 

2.19    " 

23 

2.17 

2.19 

2.21 

2.23 

2.25 

2.21 

2.23 

2.25 

2.27 

2.28 

24 

2.26 

2.28 

2.3O 

2.32 

2-34 

2.30 

2.32 

2-34 

2-36 

2.38 

25 

2.36 

2.38 

2.40 

2.41 

2-43 

2.40 

2.42 

2.44 

2.46 

2.48 

26 

2-45 

2.47 

2-49 

2.51 

2-53 

2-49 

2.51 

2.53 

2-55 

2-57 

27 

2-55 

2-57 

2.58 

2.60 

2.62 

2-59 

2.61 

2-63 

2.65 

2.67    i 

28 

2.64 

2.66 

2.68 

2.70 

2.72 

2.69 

2.70 

2.72 

2.74 

2.76    i 

29 

2-73 

2-75 

2.77 

2.79 

2.81 

2.78 

2.80 

2.82 

2.84 

2.86    i 

30 

2.83 

2.85 

2.87 

2.88 

2.90 

2.88 

2.90 

2.91 

2-93 

2-95 

3i 

2.92 

2-94 

2.96 

2.98 

3.00 

2.97 

2-99 

3-oi 

3-03 

3-05     ; 

32 

3.02 

3-03 

3-05 

3-07 

3-09 

3-07 

3-09 

3-H 

3.12 

3-H 

33 

3-H 

3-13 

3-15 

3.16 

3.18 

3.16 

3-i8 

3.20 

3-22 

3-24    j 

34 

3-20 

3.22 

3-24 

3-26 

3-28 

3-26 

3-28 

3-30 

3-31 

3-33 

35 

3-30 

3-3i 

3-33 

3-35 

3-37 

3-35 

3-37 

3-39 

3-4i 

3-43 

SMITHSONIAN  TABLES. 


TABLE   11 
REDUCTION    OF  THE    BAROMETER    TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

600  mm. 

HEIGHT   OF  THE   BAROMETER 

605  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.04 

0.06 

0.08 

o.oo 

O.O2 

0.04 

0.06 

0.08 

i 

.10 

.12 

.14 

.16 

.18 

.10 

.12 

.14 

.16 

.18 

2 

.20 

.22 

.24 

•25 

•27 

.20 

.22 

•24 

'.26 

.28 

3 

.29 

•31 

•33 

•35 

•37 

•30 

•32 

•34 

•36 

•38 

4 

•39 

.41 

.  -43 

•45 

•47 

.40 

.41 

•43 

•45 

•47 

5 

0.49 

0.51 

0-53 

o.55 

0-57 

0.49 

0.51 

0.53 

o.55 

o.57 

6 

•59 

.61 

•63 

•65 

.67 

•59 

.61 

.63 

•65 

.67 

7 

.69 

.70 

•  72 

•74 

.76 

.69 

•71 

•73 

•75 

•77 

8 

•  78 

.80 

.82 

.84 

.86 

•79 

.81 

•83 

.85. 

•  87 

9 

.88 

.90 

.92 

•94 

.96 

.89 

.91 

•93 

•95 

•97 

10 

0.98 

.00 

.02 

1.04 

1.06 

0.99 

1.  01 

•03 

1.05 

.07 

ii 

.08 

.10 

.12 

1-13 

I-I5 

1.09 

1.  10 

.12 

1.14 

.16 

12 

•17 

•!9 

.21 

1.23 

1-25 

1.18 

1.20 

.22 

1.24 

.26 

1.3 

.27 

•29 

•31 

i-33 

i-35 

.28 

1.30 

•32 

i-34 

•36 

H 

•37 

•39 

.41 

T-43 

1-45 

•38 

I.4O 

.42 

1.44 

.46 

15 

•47 

•49 

•51 

•53 

1-54 

•48 

1.50 

•52 

•54 

.56 

16 

•  56 

•58 

.60 

.62 

1.64 

•58 

1.60 

.62 

.64 

.66 

i? 

.66 

.68 

.70 

.72 

1.74 

.68 

1.70 

•71 

•73 

•75 

18 

.76 

•  78 

.80 

1.82 

1.84 

1.77 

1.79 

i.  Si 

•83 

•85 

19 

.86 

.88 

.90 

•9i 

i-93 

1.87 

1.89 

1.91 

•93 

•95 

20 

i-95 

1.97 

1.99 

2.01 

2.03 

1.97 

1.99 

2.01 

2.03 

2.05 

21 

2.05 

2.07 

2.09 

2.II 

2.13 

2.07 

2.09 

2.  II 

2.13 

2-15 

22 

2.15 

2.17 

2.19 

2.21 

2.23 

2.17 

2.19 

2.21 

2.23 

2.24 

23 

2.25 

2.26 

2.28 

2.30 

2.32 

2.26 

2.28 

2.30 

2.32 

2-34 

24 

2-34 

*  2.36 

2.38 

2.40 

2.42 

2.36 

2.38 

2.40 

2.42 

2.44 

25 

2.44 

2.46 

2.48 

2.50 

2.52 

2.46 

2.48 

2.50 

2.52 

2-54 

26 

2-54 

2.56 

2.58 

2.60 

2.61 

2.56 

2.58 

2.60 

2.62 

2.64 

27 

2.63 

2.65 

2.67 

2.69 

2.71 

2.66 

2.68 

2.70 

2.71 

2-73 

28 

2.73 

2-75 

2.77 

2.79 

2.81 

2-75 

2.77 

2.79 

2.&I 

2.83 

29 

2.83 

2.85 

2.87 

2.89 

2.91 

2.85 

2.87 

2.89 

2.9I 

2-93 

30 

2-93 

2.94 

2.96 

2.98 

3.00 

2-95 

2.97 

2-99 

3.01 

3-03 

3i 

3.02 

3-04 

3-06 

3.08 

3.10 

3-05 

3-07 

3-09 

3-n 

3-13 

32 

3.12 

3-14 

3-16 

3-i8 

3-20 

3-J5 

3-i6 

3-i8 

3-20 

3-22 

33 

3-22 

3-24 

3-25 

3-27 

3-29 

3-24 

3-26 

3-28 

3-30 

3-32 

34 

3-31 

3-33 

3-35 

3-37 

3-39 

3-34 

3.36 

3.38 

3-40 

3-42 

35 

3-41 

3-43 

3-45 

3-47 

3-49 

3-44 

3-46 

3-48 

3-50 

3-52 

SMITHSONIAN  TABLES. 


TABLE   11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

610  mm. 

HEIGHT   OF   THE   BAROMETER     . 

615  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.04 

O.o6 

0.08 

O.OO 

O.O2 

0.04 

0.06 

O.o8 

i 

.10 

.12 

.14 

.16 

.18 

.10 

.12 

.14 

.16 

.18 

2 

.20 

.22 

.24 

.26 

.28 

.20 

.22 

.24 

.26 

.28 

3 

•30 

•32 

•34 

.36 

•38 

•30 

•32 

•34 

•36 

•38 

4 

.40 

.42 

•44 

.46 

.48 

.40 

.42 

•  44 

.46 

•48 

5 

0.50 

0.52 

o-54 

0.56 

0.58 

0.50 

0.52 

0-54 

0.56 

0.58 

6 

.60 

.62 

.64 

.66 

.68 

.60 

.62 

.64 

.66 

.68 

7 

.70 

.72 

•74 

•  76 

.78 

.70 

.72 

•74 

.76 

•  78 

8 

.80 

.82 

.84 

.86 

.88 

.80 

.82 

.84 

.86 

.88 

9 

.90 

.92 

•94 

.96 

.98 

.90 

•92 

•94 

.96 

.98 

10 

0.99 

.OI 

1.03 

1.05 

.07 

.00 

1.02 

1.04 

.06 

1.08 

ii 

1.09 

.11 

1-13 

1-15 

•17 

.10 

1.  12 

1.14 

.16 

1.18 

12 

I.I9 

.21 

1.23 

1.25 

•27 

.20 

.22 

1.24 

.26 

1.28 

13 

.29 

•31 

i-33 

1-35 

•37 

•30 

•32 

i-34 

•36 

•38 

14 

•39 

.41 

i-43 

i-45 

•47 

.40 

.42 

1.44 

.46 

.48 

15 

•49 

•51 

i-53 

1-55 

•57 

•50 

•52 

1-54 

•  56 

•58 

16 

•59 

.61 

1-63 

1.65 

.67 

.60 

.62 

1.64 

.66 

.68 

17 

.69 

•71 

1-73 

1-75 

•77 

.70 

.72 

1.74 

.76 

•  78 

1  8 

1.79 

.81 

1.83 

1.85 

.87 

.80 

.82 

1.84 

.86 

.88 

19 

1.89 

•91 

i-93 

i-95 

•97 

.90 

•92 

1.94 

.96 

•98 

20 

1.99 

2.OI 

2.03 

2.05 

2.07 

2.00 

2.O2 

2.04 

2.06 

2.08 

21 

2.09 

2.10 

2.12 

2.14 

2.16 

2.10 

2.12 

2.14 

2.16 

2.18 

22 

2.18 

2.  2O 

2.22 

2.24 

2.26 

2.20 

2.22 

2.24 

2.26 

2.28 

23 

2.28 

2.30 

2.32 

2-34 

2.36 

2.30 

2.32 

2-34 

2.36 

2.38 

24 

2.38 

2.4O 

2.42 

2.44 

2.46 

2.40 

2.42 

2.44* 

2.46 

2.48 

25 

2.48 

2.50 

2-52 

2-54 

2.56 

2.50 

2.52 

2-54 

2.56 

2.58 

26 

2.58 

2.60 

2.62 

2.64 

2.66 

2.6O 

2.62 

2.64 

2.66 

2.68 

27 

2.68 

2.70 

2.72 

2-74 

2.76 

2.70 

2.72 

2.74 

2.76 

2.78 

28 

2.78 

2.80 

2.82 

2.84 

2.86 

2.80 

2.82 

2.84 

2.86 

2.88 

29 

2.88 

2.90 

2.91 

2-93 

2-95 

2.90 

2.92 

2.94 

2.96 

2.98 

30 

2-97 

2.99 

3.01 

3-03 

3-05 

3.00 

3.02 

3-04 

3.06 

3.08 

3i 

3-07 

3-09 

3-u 

3-13 

3-15 

3.10 

3.12 

3-14 

3-i6 

3-i8 

32 

3-i7 

3-19 

3-2i 

3-23 

3-25 

3.20 

3.22 

3-24 

3-26 

3-28 

33 

3-27 

3-29 

3-31 

3-33 

3-35 

3-30 

3-32 

3-34 

3.36 

3.38 

34 

3-37 

3-39 

3-41 

3-43 

3-45 

3-40 

3-42 

3-44 

3-46 

3-46 

35 

3-47 

3-49 

3-5i 

3-53 

3-55 

3-49 

3-51 

3-53 

3-55 

3-57 

SMITHSONIAN  TABLES. 


TABLE  11 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

62O  mm. 

HEIGHT   OF   THE   BAROMETER 

625  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.04 

0.06 

0.08 

0.00 

0.02 

0.04 

0.06 

0.08 

i 

.10 

.12 

.14 

.16 

.18 

.  IO 

.12 

.14 

.16 

.18 

2 

.20 

.22 

-24 

.26 

.28 

.20 

.22 

.24 

•27 

.29 

3 

•30 

•32 

•34 

•36 

•38 

•31 

•33 

•35 

•37 

•39 

4 

.40 

•43 

•45 

•47 

•49 

.41 

•43 

•45 

•47 

.49 

5 

0.51 

o-53 

0-55 

o.57 

0-59 

0.51 

o-53 

0-55 

0-57 

o.59 

6 

.61 

•63 

•65 

.67 

.69 

.61 

•63 

•65 

.67 

.69 

7 

•71 

•73 

•75 

•  77 

•79 

•71 

•73 

•75 

.78 

.80 

8 

.81 

•83 

•85 

.87 

.89 

.82 

.84 

.86 

.88 

•9° 

9 

•91 

•93 

•95 

•97 

•99 

•92 

•94 

.96 

•98 

1.  00 

10 

.OI 

•03 

1.05 

.07 

.09 

.02 

.04 

.06 

.08 

1.  10 

ii 

.11 

•13 

I.I5 

•17 

•19 

.12 

.14 

.16 

.18 

1.20 

12 

.21 

•23 

1-25 

•27 

.29 

.22 

•  24 

.26 

.28 

1.30 

13 

•31 

•33 

i-35 

•37 

•39 

•32 

•34 

•37 

•39 

I.4I 

14 

.41 

•43 

1.46 

.48 

•50 

•43 

•45 

•47 

•49 

I-5I 

15 

•52 

•54 

1.56 

•58 

.60 

•53 

•55 

•57 

•59 

i.6r 

16 

.62 

.64 

1.66 

.68 

.70 

•63 

1.65 

.67 

.69 

1.71 

17 

.72 

•  74 

1.76 

.78 

.80 

•73 

i-75 

•77 

1-79 

1.81 

18 

.82 

.84 

1.86 

1.88 

.90 

•83 

1.85 

.87- 

1.89 

1.91 

19 

.92 

•94 

1.96 

1.98 

2.00 

•93 

i-95 

•97 

1.99 

2.OI 

20 

2.  02 

2.04 

2.06 

2.08 

2.10 

2.04 

2.06 

2.08 

2.10 

2.12 

21 

2.12 

2.14 

2.16 

2.18 

2.20 

2.14 

2.16 

2.18 

2.20 

2.22 

22 

2.22 

2.24 

2.26 

2.28 

2.30 

2.24 

2.26 

2.28 

2.30 

2.32 

23 

2.32 

2-34 

2.36 

2.38 

2.4O 

2-34 

2.36 

2.38 

2.40 

2.42 

24 

2.42 

2.44 

2.46 

2.48 

2.50 

2.44 

2.46 

2.48 

2.50 

2.52 

25 

2.52 

2-54 

2.56 

2.58 

2.60 

-2.54 

2.56 

2.58 

2.60 

2.62 

26 

2.62 

2.64 

2.66 

2.68 

2.7O 

2.64 

2.66 

2.68 

2.70 

2.72 

27 

2./2 

2-74 

2.76 

2.78 

2.80 

2.74 

2.76 

2.78 

2.80 

2.82 

28 

2.82 

2.84 

2.86 

2.88 

2.90 

2.85 

2.87 

2.89 

2.91 

2-93 

29 

2.92 

2-.  94 

2.96 

2.98 

3.00 

2-95 

2.97 

2.99 

3.01 

3-03 

30 

3.02 

3-04 

3-o6 

3-o8 

3.10 

3-05 

3-07 

3-09 

3-n 

3-13 

3i 

3.12 

3-14 

3-i6 

3-i8 

3.20 

3-15 

3-17 

3-19 

3-21 

3-23 

32 

3.22 

3-24 

3.26 

3.28 

3-30 

3-25 

3-27 

3-29 

3-3i 

3-33 

33 

3-32 

3-34 

3-36 

3-38 

3-40 

3-35 

3-37 

3-39 

3-4i 

3-43 

34 

3-42 

3-44 

3-46 

3-48 

3-50 

3-45 

3-47 

3-49 

3-51 

3-53 

35 

3-52 

3-54 

3.56 

3-58 

3-60 

3-55 

3-57 

3-59 

3-6i 

3.63 

SMITHSONIAN  TABLES. 


39 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD    TEMPERATURE. 

METRIC     MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE  BAROMETER 

HEIGHT   OF   THE   BAROMETER 

630  mm. 

635  mm. 

Attached 

Ther- 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

mometer. 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.04 

0.06 

0.08 

O.OO 

0.02 

0.04 

O.o6 

0.08 

i 

.10 

.12 

.14 

.16 

.19 

.10 

.12 

•15 

•17 

•!9 

2 

.21 

•23 

•25 

.27 

.29 

.21 

•23 

•25 

•27 

.29 

3 

•31 

•33 

•35 

•37 

•39 

•31 

•33 

•35 

•37 

•39 

4 

.41 

•43 

•45 

•47 

•49 

.41 

•44 

.46 

.48 

•50 

5 

0.51 

o.53 

0.56 

0.58 

0.60 

0.52 

o.54 

0.56 

0.58 

0.60 

6 

.62 

.64 

.66 

.68 

.70 

.62 

.64 

.66 

.68 

.70 

7 

.72 

•74 

.76 

•78 

.80 

•73 

•75 

•  77 

•79 

.81 

8 

.82 

.84 

.86 

.88 

.90 

•83 

•85 

.87 

.89 

•9i 

9 

.92 

•95 

•97 

•99 

I.OI 

•93 

•95 

•97 

•99 

1.02 

10 

•03 

•05 

•07 

.09 

.11 

.04 

.06 

1.08 

.10 

.12 

ii 

•13 

•15 

•17 

.19 

.21 

.14 

.16 

1.18 

.20 

.22 

12 

•23 

•25 

.27 

.29 

•31 

.24 

.26 

.28 

•30 

•33 

13 

•34 

•36 

•38 

.40 

•42 

•35 

•37 

•39 

.41 

•43 

14 

.44 

.46 

.48 

•50 

•52 

•45 

-47 

1-49 

•Si 

•53 

15 

•54 

1.56 

•58 

.60 

.62 

•55 

1-57 

•59 

.61 

•63 

16 

.64 

1.66 

.68 

.70 

.72 

.66 

.68 

.70 

•  72 

•74 

i? 

1.74 

1.77 

•79 

.81 

•83 

.76 

.78 

.80 

.82 

.84    ! 

18 

1.85 

1.87 

.89 

•91 

•93 

1.86 

.88 

1.90 

1.92 

•94 

19 

1-95 

1.97 

1.99 

2.01 

2.03 

1.96 

•99 

2.01 

2.03 

2-05        ; 

20 

2.05 

2.07 

2.09 

2.  II 

2.13 

2.07 

2.09 

2.  II 

2.13 

2.15 

21 

2.15 

2.17 

2.19 

2.21 

2.24 

2.17 

2.19 

2.21 

2.23 

2.25 

22 

2.26 

2.28 

2.30 

2.32 

2-34 

2.27 

2.29 

2.31 

2.34 

2.36 

23 

2.36 

2.38 

2.40 

2.42 

2-44 

2.38 

2.40 

2.42 

2.44 

2.46 

24 

2.46 

2.48 

2.50 

2.52 

2-54 

2.48 

2.50 

2.52 

2-54 

2.56 

25 

2.56 

2.58 

2.60 

2.62 

2.64 

2.58 

2.60 

2.62 

2.64 

2.66 

26 

2.66 

2.68 

2.70 

2-73 

2-75 

2.69 

2.71 

2.73 

2-75 

2.77 

27 

2.77 

2-79 

2.81 

2.83 

2.85 

2.79 

2.81 

2.83 

2.85 

2.87 

28 

2.87 

2.89 

2.91 

2-93 

2-95 

2.89 

2.91 

2-93 

2-95 

2.97 

29 

2.97 

2.99 

3-oi 

3-03 

3-05 

2.99 

3.01 

3-03 

3-05 

3.08 

30 

3-07 

3-09 

3-11 

3-!3 

3-15 

3.10 

3.12 

3-i4 

3-i6 

3-18 

3i 

3-17 

3-J9 

3-21 

3-23 

3-25 

3-20 

3.22 

3-24 

3-26 

3-28 

32 

3-28 

3-30 

3-32 

3-34 

3.36 

3.30 

3-32 

3-34 

3.36 

3.38 

33 

3.38 

3-40 

3-42 

3-44 

3.46 

3.40 

3-42 

3-44 

3-47 

3-49 

34 

3.48 

3-50 

3-52 

3-54 

3.56 

3.51 

3-53 

3-55 

3-57 

3-59 

35 

3.58 

3-60 

3-62 

3-64 

3-66 

3.61 

3.63 

3-65 

3-67 

3.69 

SMITHSONIAN  TABLES. 


40 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD   TEMPERATURE. 

METRIC   MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OP   THE   BAROMETER 

HEIGHT   OF   THE   BAROMETER 

640  mm. 

645  mm. 

Attached 

Ther- 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

mometer. 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

o.oo 

O.O2 

0.04 

O.o6 

0.08 

0.00 

O.O2 

0.04 

0.06 

0.08 

i 

.10 

•13 

•15 

•17 

•!9 

.11 

•13 

.15 

•17 

•!9 

2 

.21 

•23 

•25 

.27 

.29 

.21 

.23 

•25 

.27 

.29 

3 

•31 

•33 

•36 

.38 

.40 

.32 

•34 

•36 

•38 

.40 

4 

.42 

.44 

.46 

.48 

•50 

.42 

.44 

•46 

.48 

.51 

5 

0.52 

0-54 

0.56 

0.59 

0.61 

0-53 

0.55 

0-57 

0-59 

0.61 

6 

.63 

.65 

.67 

.69 

•  71 

.63 

.65 

.67 

.69 

.72 

7 

•73 

•75 

•77 

•79 

.81 

•  74 

.76 

.78 

.80 

.82 

8 

.84 

.86 

.88 

.90 

.92 

.84 

.86 

.88 

.90 

•93 

9 

•94 

.96 

.98 

I.OO 

1.02 

•95 

•97 

-99 

1.  01 

1.03 

10 

1.04 

i.  06 

.09 

i.  ii 

LI3 

1.05 

.07 

1.09 

1.  12 

.14 

ii 

•15 

•17 

•19 

1.  21 

1.23 

i.z6 

.18 

1.20 

1.22 

.24 

12 

•25 

.27 

.29 

I-3I 

i-34 

.26 

.28 

1.30 

1.32 

•35 

13 

.36 

.38 

.40 

1.42 

1.44 

•37 

•39 

I.4I 

1-43 

•45 

14 

.46 

.48 

•50 

1.52 

1-54 

.47 

•49 

I-5I 

1-53 

.56 

15 

.56 

•59 

.61 

1.63 

1.65 

.58 

.60 

1.62 

1.64 

.66 

16 

•67 

.69 

•71 

1-73 

i.75 

.68 

.70 

1.72 

1.74 

•77 

17 

•  77 

•79 

.81 

1.83 

1.86 

1.79 

.81 

1.83 

1.85 

.87 

18 

.88 

.90 

•92 

1.94 

1.96 

1.89 

1.91 

i-93 

1-95 

•97 

19 

.98 

2.00 

2.  02 

2.04 

2.06 

2.OO 

2.  02 

2.04 

2.06 

2.08 

20 

2.08 

2.10 

2.13 

2.15 

2.17 

2.IO 

2.12 

2.14 

2.16 

2.18 

21 

2.19 

2.21 

2.23 

2.25 

2.27 

2.  2O 

2.23 

2.25 

2.27 

2.29 

22 

2.29 

2.31 

2-33 

2-35 

2-37 

2.3I 

2-33 

2-35 

2-37 

2-39 

23 

2.40 

2.42 

2.44 

2.46 

2.48 

2.41 

2-43 

2.46 

2.48 

2.50 

24 

2.50 

2.52 

2-54 

2.56 

2.58 

2.52 

2-54 

2.56 

2.58 

2.60 

25 

2.60 

2.62 

2.64 

2.66 

2.69 

2.62 

2.64 

2.66 

2.69 

2.71 

26 

2.71 

2-73 

2-75 

2-77 

2.79 

2-73 

2-75 

2.77 

2.79 

2.81 

27 

2.81 

2.83 

2.85 

2.87 

2.89 

2.83 

2.85 

2.87 

2.89 

2.92 

28- 

2.91 

2-93 

2-95 

2.98 

3.00 

2.94 

2.96 

2.98 

3.00 

3.02 

29 

3.02 

3-°4 

3-06 

3-o8 

3.10 

3-04 

3.06 

3.08 

3.10 

3.12 

30 

3.12 

3-i4 

3-i6 

3-i8 

3-20 

3-14 

3.17 

3-19 

3-21 

3-23 

3i 

3.22 

3-24 

3-27 

3-29 

3.31 

3.25 

3-27 

3-29 

3.31 

3-33 

32 

3-33 

3-35 

3-37 

3-39 

3-41 

3-35 

3-37 

3-39 

3.42 

3-44 

33 

3-43 

3-45 

3-47 

3-49 

3.51 

346 

3.48 

3-50 

3.52 

3-54 

\S     WT 

34 

3-53 

3-55 

3.58 

3-60 

3.62 

3.56 

3-58 

3-60 

3.62 

3-64 

35 

3-64 

3-66 

3-68 

3-70 

3.72 

3.67 

3-69 

3-7i 

3.73 

3-75 

i 

SMITHSONIAN  TABLES. 


TABLE  11. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE   CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT    OF   THE   BAROMETER 

650   mm. 

HEIGHT   OF   THE   BAROMETER 

655  mm. 

Attached 
Then- 

mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.04 

O.o6 

0.08 

0.00 

O.O2 

0.04 

0.06 

0.09 

i 

.11 

.13 

•15 

•17 

.19 

.11 

•T3 

•15 

•17 

.19 

2 

.21 

•23 

•25 

.28 

•30 

.21 

.24 

.26 

.28 

•3° 

3 

•32 

•34 

•36 

•38 

.40 

•32 

•34 

•36 

•39 

.41 

4 

.42 

•45 

•  47 

•49 

•51 

•43 

•45 

•47 

•49 

•5i 

5 

o-53 

0-55 

o-57 

0-59 

0.62 

o-53 

0.56 

0.58 

0.60 

0.62 

6 

.64 

.66 

.68 

.70 

•72 

.64 

.66 

.68 

•7i 

•73 

7 

•  74 

.76 

•78 

.81 

•83 

•75 

•77 

•79 

.81 

•83 

8 

•85 

.87 

.89 

•9i 

•93 

•85 

.88 

.90 

•92 

•94 

9 

•95 

.98 

1.  00 

1.02 

1.04 

.96 

.98 

1.  00 

1.03 

1.05 

10 

.06 

1.08 

.10 

.12 

1.14 

.07 

1.09- 

.11 

i-i3 

•15 

ii 

-17 

1.19 

.21 

•23 

1.25 

•  17 

i.  20 

.22 

1.24 

.26 

12 

.27 

1.29 

•31 

•34 

1.36 

.28 

1.30 

•32 

!-35 

•37 

13 

•38 

1.40 

.42 

•  44 

1.46 

•39 

1.41 

•43 

1-45 

•47 

14 

.48 

1.50 

•53 

•55 

i-57 

•49 

1.52 

•54 

1.56 

•58 

15 

•59 

1.6! 

•63 

•65 

1.67 

.60 

1.62 

.64 

1.66 

.69 

16 

.69 

1.72 

•74 

.76 

1.78 

•71 

i-73 

•75 

'  i-77 

•79 

17 

.80 

1.82 

.84 

1.86 

1.88 

.81 

1.84 

.86 

1.88 

.90 

18 

•91 

r-93 

•95 

1.97 

i-99 

•92 

1.94 

.96 

1.98 

2.OI 

19 

2.OI 

2.03 

2.05 

2.07 

2.IO 

2.03 

2.05 

2.07 

2.09 

2.  1  1 

20 

2.12 

2.14 

2.16 

2.18 

2.20 

2.13 

2-15 

2.18 

2.  2O 

2.22 

21 

2.22 

2.24 

2.26 

2.29 

2.31 

2.24 

2.26 

2.28 

2.30 

2.32 

22 

2-33 

2-35 

2-37 

2-39 

2.41 

2-35 

2-37 

2-39 

2.41 

2-43 

23 

2-43 

2-45 

2.47 

2.50 

2.52 

2-45 

2.47 

2.49 

2.52 

2-54 

24 

2-54 

2.56 

2.58 

2.60 

2.62 

2.56 

2.58 

2.60 

2.62 

2.64 

25 

2.64 

2.66 

2.69 

2.71 

2-73 

2.66 

2.68 

2.71 

2-73 

2.75 

26 

2-75 

2.77 

2-79 

2.81 

2.83 

2.77 

2.79 

2.81 

2.83 

2.85 

27 

2.85 

2.87 

2.90 

2.92 

2.94 

2.88 

2.90 

2.92 

2.94 

2.96 

28 

2.96 

2.98 

3.00 

3.02 

3-04 

2.98 

3.00 

3.02 

3-05 

3-07 

29 

3-o6 

3.08 

3-n 

3.13 

3-15 

3-09 

3-H 

3.13 

3-15 

3-17 

30 

3-i7 

3-19 

3.21 

3-23 

3-25 

3-19 

3-2i 

3-24 

3-26 

3-28 

3i 

3-27 

3-30 

3-32 

3-34 

3-36 

3-30 

3-32 

3-34 

3.36 

3-38 

32 

3.38 

3-40 

3-42 

3-44 

3-46 

3-41 

3-43 

3-45 

3-47 

3-49 

33 

3-48 

3-51 

3-53 

3-55 

3-57 

3-5i 

3-53 

3-55 

3-57 

3-6o 

34 

3-59 

3-6i 

3-63 

3.65 

3-67 

3-62 

3-64 

3-66 

3-68 

3-70 

35 

3-69 

3-7i 

3-74 

3.76 

3-78 

3-72 

3-74 

3.76 

3-79 

3-8i 

SMITHSONIAN  TABLES. 


TABLE  11 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE   BAROMETER 

66O  mm. 

HEIGHT   OF   THE   BAROMETER 

665  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0         0?2     j     0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.04 

O.O6 

0.09 

0.00 

0.02 

0.04 

0.07 

0.09 

i 

.11 

•13 

•15 

•17 

•19 

.11 

•13 

•15 

•17 

.20 

2 

.22 

.24 

.26 

.28 

•30 

.22 

.24 

.26 

.28 

•30 

3 

•32 

•34 

•37 

•39 

.41 

•33 

•35 

•37 

•39 

.41 

4 

•43 

•45 

•47 

•50 

•52 

•43 

.46 

.48 

•50 

•52 

5 

0-54 

0.56 

0.58 

0.60 

0.62 

0-54 

0.56 

0-59 

0.61 

0.63 

6 

•65 

.67 

.69 

•  7i 

•73 

•65 

.67 

.69 

.72 

•74 

7 

•75 

.78 

.80 

.82 

•84 

•  76 

.73 

.80 

.82 

•85 

8 

.86 

.88 

.90 

•93 

•95 

•  87 

.89 

•91 

•93 

•95 

9 

•97 

•99 

1.  01 

1.03 

1.05 

.98 

I.OO 

1.02 

1.04 

i.  06 

10 

1.08 

1.  10 

1.  12 

.14 

.16 

.08 

I.  II 

J-I3 

i-i5 

1.17 

ii 

1.18 

.21 

1.23 

•25 

•  27 

•19 

1.  21 

1.24 

1.26 

1.28 

12 

1.29 

•31 

1-33 

•36 

•38 

.30   i     1.32 

i-34 

i-37 

i-39 

J3 

1.40 

.42 

1.44 

•46 

•48 

.41 

1-43 

i-45 

1.47 

1.50 

14 

1-51 

•53 

L55 

•57 

•59 

•52 

1-54 

1.56 

1.58 

i.  60 

15 

1.61 

•63 

1.66 

.68 

.70 

•63 

1.65 

1.67 

1.69 

1.71 

16 

1.72 

•74 

1.76 

•78 

.81 

•73 

1.76 

1.78 

1.80 

1.82 

i? 

1.83 

1.85 

1.87 

.89 

.91 

1.84 

1.86 

1.88 

1.91 

i-93 

18 

i-93 

1.96 

1.98 

2.00 

2.  02 

i-95 

1.97 

1.99 

2.01 

2.04 

19 

2.04 

2.06 

2.08 

2.  II 

2.13 

2.06- 

2.08 

2.  IO 

2.12 

2.14 

20 

2.15 

2.17 

2.19 

2.21 

2.23 

2.17 

2.19 

2.21 

2.23 

2.25 

21 

2.26 

2.28 

2.30 

2.32 

2-34 

2.27 

2.29 

2.32 

2-34 

2.36 

22 

2.36 

2.38 

2.41 

2-43 

2-45 

2.38 

2.40 

2.42 

2-45 

2-47 

23 

2.47 

2-49 

2-51 

2-53 

2.56 

2.49 

2-51 

2-53 

2-55 

2-57 

24 

2.58 

2.60 

2.62 

2.64 

2.66 

2.60 

2.62 

2.64 

2.66 

2.68 

25 

2.68 

2.71 

2-73 

2.75 

2.77 

2.70 

2.73 

2-75 

2.77  • 

2.79 

26 

2.79 

2.81 

2.83 

2.85 

2.88 

2.81 

2-83 

2.85 

2.88 

2.90 

27 

2.90 

2.92 

2.94 

2.96 

2.98 

2.92 

2.94 

2.96 

2.98 

3-oi 

28 

3.00 

3-03 

3-05 

3-07 

3-09 

3-03 

3-05 

3-07 

3-09 

3-n 

29 

3-n 

3-!3 

3-15 

3-18 

3.20 

3-13 

3-i6 

3-18 

3-20 

3-22 

30 

3-22 

3-24 

3-26 

3-28 

3-30 

3-24 

3-26 

3-29 

3-31 

3-35 

3i 

3-32 

3-35 

3-37 

3-39 

3-4i 

3-35 

3-37 

3-39 

3-41 

3-44 

32 

3-43 

3-45 

3-47 

3-49 

3-52 

3.46 

3-48 

3-50 

3-52 

3-54 

33 

3-54 

3-56 

3-58 

3.6o 

3-62 

3.56 

3-59 

3-6i 

3-63 

3-65 

34 

3-64 

3-67 

3-69 

3-71 

3-73 

3-67 

3-69 

3-71 

3-74 

3-76 

35 

3-75 

3-77 

3-79 

3-81 

3-84 

3-78 

3-8o 

3-82 

3-84 

3-86 

SMITHSONIAN  TABLES. 


43 


1ABLE  11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

670  mm. 

HEIGHT   OF   THE   BAROMETER 

675  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.04 

0.07 

0.09 

o.oo 

0.02 

0.04 

O.O7 

0.09 

i 

.11 

•13 

•15 

.18 

.20 

.11 

•13 

•15 

.18 

.20 

2 

.22 

.24 

.26 

.28 

•31 

.22 

.24 

.26 

.29 

•31 

3 

•33 

•35 

•37 

•39 

.42 

•33 

•35 

•37 

.40 

.42 

4 

.44 

.46 

.48 

•50 

•53 

•44 

.46 

.48 

•51 

•53 

5 

0.55 

0.57 

0-59 

0.61 

0.63 

0-55 

0-57 

0.60 

0.62 

0.64 

6 

.66 

.68 

.70 

•72 

-74 

.66 

.68 

•7i 

•73 

•75 

7 

•77 

•79 

.81 

•83 

•85 

•  77 

•79 

.82 

.84 

.86 

8 

.87 

.90 

•92 

•94 

.96 

.88 

.90 

•93 

•95 

•97 

9 

.98 

1.  01 

1.03 

1.05 

1.07 

•99 

1.  01 

1.04 

1.06 

1.08 

10 

.09 

.11 

.14 

.16 

.18 

1.  10 

1.  12 

.14 

1.17 

1.19 

ii 

.20 

.22 

•25 

.27 

.29 

1.  21 

1.23 

•25 

1.28 

1.30 

12 

•31 

•33 

•35 

•38 

.40 

1.32 

1-34 

•36 

1-39 

1.41 

J3 

.42 

•44 

.46 

•49 

•5i 

1-43 

1-45 

•47 

1.50 

1.52 

M 

•53 

•55 

•57 

•59 

.62 

i-54 

1.56 

•58 

1.61 

1.63 

15 

1.64 

.66 

.68 

.70 

•  72 

1.65 

1.67 

.69 

1.72 

1.74 

16 

i-75 

•  77 

•79 

.81 

•83 

1.76 

1.78 

.80 

1.83 

1.85 

17 

1.86 

.88 

.90 

1.92 

1.94 

1.87 

1.89 

.91 

1.94 

1.96 

18 

1.96 

•99 

2.01 

2.03 

2.05 

1.98 

2.00 

2.02 

2.04 

2.07 

19 

2.07 

2.09 

2.12 

2.14 

2.16 

2.09 

2.  II 

2.13 

2.15 

2.18 

20 

2.18 

2.20 

2.23 

2.25 

2.27 

2.20 

2.22 

2.24 

2.26 

2.29 

21 

2.29 

2.31 

2-33 

2.36 

2.38 

2.31 

2.33 

2-35 

2-37 

2-39 

22 

2.40 

2.42 

2.44 

2.46 

2.49 

2.42 

2-44 

2.46 

2.48 

2.50 

23 

2.51 

2-53 

2-55 

2.57 

2-59 

2-53 

2-55 

2-57 

2-59 

2.61 

24 

2.62 

2.64 

2.66 

2.68 

2.70 

2.64 

2.66 

2.68 

2.70 

2.72 

25 

2.72 

2-75 

2.77 

2-79 

2.81 

2.74 

2-77 

2.79 

2.81 

2.83 

26 

2.83 

2.85 

2.88 

2.90 

2.92 

2.85 

2.88 

2.90 

2.92 

2.94 

27 

2.94 

2.96 

2.98 

3.01 

3-03 

2.96 

2-99 

3.01 

3-03 

3-°5 

28 

3-05 

3-07 

3-09 

3-n 

3-14 

3-07 

3-09 

3.12 

3-14 

3.16 

29 

3-16 

3-18 

3-20 

3.22 

3-24 

3-i8 

3-20 

3-23 

3-25 

3-27 

30 

3-27 

3-29 

3-31 

3-33 

3-35 

3-29 

3-31 

3-33 

3.36 

3.38 

3i 

3-37 

3-40 

3-42 

3-44 

3-46 

3-4o 

3.42 

3-44 

3-47 

3-49 

33 

3.48 

3-50 

3-53 

3-55 

3-57 

3-5i 

3-53 

3-55 

3-57 

3-6o 

33 

3-59 

3-6i 

3-63 

3-66 

3-68 

3-62 

3-64 

3-66 

3-68 

3-71 

34 

3.70 

3-72 

3-74 

3-76 

3-79 

3-73 

3-75 

3-77 

3-79 

3-8i 

35 

3-8i 

3.83 

3.85 

3-87 

3.89 

3-84 

3-86 

3-88 

3-90 

3-92 

SMITHSONIAN  TABLES. 


44 


TABLE  11 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT    OF   THE   BAROMETER 

680  mm. 

HEIGHT   OF  THE   BAROMETER 

685  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.04 

0.07 

0.09 

O.OO 

O.O2 

0.04 

0.07 

0.09 

i 

.11 

•13 

.16 

.18 

.20 

.11 

•13 

.16 

.18 

.20 

2 

.22 

.24 

•27 

.29 

•31 

.22 

•25 

.27 

•29 

•31 

3 

•33 

.36 

•38 

.40 

.42 

•34 

•36 

•38 

.40 

•43 

4 

•44 

•  47 

•49 

•51 

•53 

•45 

•47 

•49 

•51 

•54 

5 

0.56 

0.58 

0.60 

0.62 

0.64 

0.56 

0.58 

0.60 

0.63 

0.65 

6 

.67 

.69 

•  7i 

•73 

•75 

•67 

.69 

.72 

•  74 

.76 

7 

-78 

.80 

.82 

.84 

.87 

•78 

.80 

•83 

•85 

•87 

8 

.89 

.91 

•93 

•95 

.98 

•89 

.92 

•94 

.96 

.98 

9 

I.OO 

i.  02 

1.04 

1.06 

1.09 

1.  01 

1.03 

1.05 

1.07 

1.09 

10 

.11 

I-I3 

I-I5 

.18 

1.20 

1.  12 

.14 

1.16 

i.iS 

.21 

n 

.22 

1.24 

1.26 

•29 

I-3I 

1.23 

•  25 

1.27 

1.30 

•32 

12 

•33 

•35 

i-37 

.40 

.42 

1-34 

•36 

1.38 

.41 

•43 

13 

.44 

.46 

1.49 

•5i 

•53 

i  -45 

•47 

1.50 

•52 

•54 

14 

•55 

•57 

i.  60 

.62 

.64 

1.56 

•59 

1.61 

•63 

•65 

15 

.66 

.68 

1.71 

1-73 

•75 

1.67 

.70 

1.72 

•74 

1.76 

16 

•77 

•79 

1.82 

1.84 

.86 

1.79 

.81 

1.83 

•85 

1.87 

i? 

.88 

.91 

i-93 

i-95 

•97 

1.90 

.92 

1.94 

.96 

1.99 

18 

•99 

2.02 

2.04 

2.06 

2.08 

2.01 

2.03 

2.05 

2.07 

2.10 

19 

2.10 

2.13 

2-15 

2.17 

2.19 

2.12 

2.14 

2.16 

2.19 

2.21 

20 

2.21 

2.24 

2.26 

2.28 

2.30 

2.23 

2.25 

2.27 

2.30 

2.32 

21 

2.32 

2-35 

2-37 

2-39 

2.41 

2-34 

2-36 

2-39 

2.41 

2-43 

22 

2-43 

2.46 

2.48 

2.50 

2.52 

2-45 

2-47 

2.50 

2.52 

2-54 

23 

2-54 

2-57 

2-59 

2.61 

2.63 

2.56 

2.59 

2.61 

2.63 

2.65 

24 

2.66 

2.68 

2.70 

2.72 

2.74 

2.67 

2.70 

2.72 

2.74 

2.76 

25 

2.77 

2-79 

2.81 

2.83 

2.85 

2.79 

2.81 

2.83 

2.85 

2.87 

26 

2.88 

2.90 

2.92 

2-94 

2.96 

2.90 

2.92 

2.94 

2.96 

2.99 

27 

2.99 

3.01 

3-03 

3-05 

3-07 

3.01 

3-03 

3-05 

3-07 

3-10 

28 

3.10 

3.12 

3.14 

3-i6 

3-18 

3.12 

3-14 

3-16 

3-iS 

3.21 

29 

3-21 

3-23 

3.25 

3-27 

3-29 

3-23 

3-25 

3-27 

3-30 

3.32 

30 

3.32 

3-34 

3.36 

3.38 

3-40 

3-34 

3.36 

3.38 

3-4i 

3-43 

3i 

3.43 

3-45 

3-47 

3-49 

3-5i 

3-45 

3-47 

3-49 

3-52 

3-54 

32 

3-54 

3.56 

3-58 

3-60 

3-62 

3.56 

3-58 

3-61 

3-63 

3-65 

33 

3-64 

3-67 

3-69 

3-7i 

3-73 

3-67 

3-69 

3-72 

3-74 

3-76 

34 

3-75 

3-78 

3-80 

3-82 

3-84 

3.78 

3.8o 

3-83 

3-85 

3-87 

35 

3-86 

3.89 

3-9i 

3-93 

3-95 

3-89 

3-91 

3-94 

3.96 

3.98 

SMITHSONIAN  TABLES. 


45 


TABLE   11. 

REDUCTION    OF  THE    BAROMETER    TO   STANDARD  TEMPERATURE 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF  THE   BAROMETER 

69O  mm. 

HEIGHT   OF   THE    BAROMETER 

695  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

:tnm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.05 

0.07 

0.09 

0.00 

0.02 

0.05 

0.07 

0.09 

i 

.11 

.14 

.16 

.18 

.20 

.11 

.14 

.16 

.18 

.20 

2 

•23 

•25 

.27 

.29 

•32 

•23 

•25 

.27 

•30 

•32 

3 

•34 

.36 

.38 

.41 

•43 

•34 

•36 

•39 

.41 

•43 

4 

•45 

•47 

•50 

•52 

•54 

•45 

•48 

•50 

•52 

•54 

5 

0.56 

0-59 

0.61 

0.63 

0.65 

0-57 

0-59 

0.61 

0.64 

0.66 

6 

.68 

.70 

•72 

•74 

•77 

.68 

.70 

•73 

•75 

•77 

7 

•79 

.81 

•83 

.86 

.88 

•79 

.82 

•  84 

.86 

.88 

8 

.90 

.92 

-95 

•97 

•99 

•9i 

•93 

•95 

•98 

I.OO 

9 

1.  01 

1.04 

1.06 

i.  08 

1.  10 

1.02 

1.04 

1.07 

1.09 

i.  ii 

10 

1-13 

I.I5 

1.17 

1.19 

.22 

I-I3 

.16 

.18 

1.20 

1.22 

ii 

1.24 

1.26 

1.28 

•31 

•33  . 

1.25 

.27 

.29 

I-3I 

i-34 

12 

T-35 

1-37 

i-39 

.42 

•44 

1.36 

•38 

.41 

1-43 

i-45 

13 

1.46 

1.48 

1-51 

•53 

•55 

•47 

•50 

•52 

1-54 

1.56 

14 

i-57 

1.60 

1.62 

•  64 

.66 

•59 

.61 

•63 

1.65 

1.68 

15 

1.69 

1.71 

1-73 

•75 

•  78 

.70 

1.72 

•74 

1.77 

1.79 

16 

i.  80 

1.82 

1.84 

•87 

.89 

.81 

1.83 

.86 

1.88 

1.90 

17 

1.91 

i-93 

1.96 

.98 

2.00 

•92 

i-95 

1.97 

1.99 

2.OI 

18 

2.02 

2.05 

2.07 

2.09 

2.  II 

2.04 

2.06 

2.08 

2.  II 

2.13 

J9 

2.13 

2.16 

2.18 

2.20 

2.22 

2.15 

2.17 

2.  2O 

2.22 

2.24 

20 

2.25 

2.27 

2.29 

2.31 

2-34 

2.26 

2.29 

2.31 

2-33 

2.35 

21 

2.36 

2.38 

2.40 

2-43 

2-45 

2.38 

2.40 

2.42 

2.44 

2-47 

22 

2.47 

2.49 

2.52 

2-54 

2.56 

2-49 

2-51 

2-53 

2.56 

2.58 

23 

2.58 

2.60 

2.63 

2.65 

2.67 

2.60 

2.62 

2.65 

2.67 

2.69 

24 

2.69 

2.72 

2-74 

2.76 

2.78 

2.71 

2.74 

2.76 

2.78 

2.80 

25 

2.81 

2.83 

2.85 

2.87 

2.90 

2.83 

2.85 

2.87 

2.89 

2.92 

26 

2.92 

2-94 

2.96 

2.99 

3.01 

2.94 

2.96 

2.98 

3.01 

3-03 

27 

3.03 

3-05 

3-07 

3.10 

3.12 

3-05 

3-07 

3.10 

3-12 

3-14 

28 

3-14 

3-i6 

3-!9 

3-21 

3.23 

3-i6 

3-19 

3-21 

3-23 

3-25 

29 

3.25 

3-27 

3-30 

3-32 

3-34 

3-28 

3-30 

3.32 

3-34 

3-37 

30 

3.36 

3-39 

3-4i 

3-43 

3-45 

3-39 

3-4i 

3-43 

3-46 

3-48 

3i 

3.48 

3-50 

3-52 

3-54 

3.56 

3-50 

3-52 

3-55 

3-57 

3-59 

32 

3-59 

3.6i 

3-63 

3.65 

3.68 

3-6i 

3-64 

3-66 

3-68 

3-70 

33 

3-7o 

3-72 

3-74 

3-77 

3-79 

3-73 

3-75 

3-77 

3-79 

3-8i 

34 

3.8i 

3-83 

3-85 

3-88 

3-90 

3-84 

3-86 

3-88 

3-90 

3-93 

35 

3-92 

3-94 

3-97 

3-99 

4.01 

3-95 

3-97 

3-99 

4.02 

4.04 

SMITHSONIAN  TABLES. 


46 


TABLE   11. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD   TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

700  mm. 

HEIGHT   OF   THE   BAROMETER 

7O5  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm  . 

mm. 

0° 

o.oo 

O.O2 

0.05 

0.07 

0.09 

O.OO 

0.02 

0.05 

O.O7 

0.09 

i 

.11 

.14 

.16 

.18 

.21 

.12 

.14 

.16 

.18 

.21 

2 

.23 

•25 

.27 

•30 

•32 

•23 

•25 

.28 

•30 

•32 

3 

•34 

•37 

•39 

.41 

•43 

•35 

•37 

•39 

.41 

•44 

4 

.46 

.48 

•50 

•53 

•55 

.46 

.48 

•51 

•53 

•55 

5 

0-57 

0-59 

0.62 

0.64 

0.66 

0.58 

0.6o 

0.62 

0.64 

0.67 

6 

.69 

•  7i 

•73 

•75  • 

.78 

•69 

•71 

•  74 

•  76 

.78 

7 

.80 

.82 

•  85 

.87 

.89 

.81 

•83 

•85 

•  87 

.90 

8 

.91 

•94 

•96 

.98 

1.  00 

.92 

•94 

•97 

•99 

.01 

9 

1.03 

1.05 

1.07 

1.  10 

1.  12 

1.04 

1.06 

1.08 

1.  10 

.  .13 

10 

.14 

1.16 

1.19 

1.  21 

1.23 

I-I5 

1.17 

.20 

1.22 

•  24 

ii 

.26 

1.28 

1.30 

•32 

i-35 

1.26 

1.29 

•31 

•33 

.36 

12 

•37 

•39 

1.42 

•44 

1.46 

•38 

1.40 

•43 

•45 

•47 

13 

.48 

•5i 

i-53 

•55 

1-57 

•49 

1.52 

•54 

•56 

•59 

14 

.60 

.62 

1.64 

•67 

1.69 

.61 

1.63 

•65 

.68 

.70 

15 

•7i 

•73 

1.76 

.78 

1.80 

•72 

i-75 

•77 

•79 

1.81 

16 

.82 

•85 

1.87 

•89 

1.92 

.84 

1.86 

.88 

.91 

i-93 

17 

•94 

.96 

.  1.98 

2.01 

2.03 

•95 

1.98 

2.00 

2.  02 

2.04 

18 

2.05 

2.07 

2.IO 

2.12 

2.14 

2.07 

2.09 

2.  1  1 

2.14 

2.16 

19 

2.17 

2.19 

2.21 

2.23 

2.26 

2.18 

2.  2O 

2.23 

2.25 

2.27 

20 

2.28 

2.30 

2.32 

2-35 

2-37 

2.30 

2.32 

2-34 

2.36 

2-39 

21 

2-39 

2.42 

2-44 

2.46 

2.48 

2.41 

2-43 

2.46 

2.48 

2.50 

22 

2-51 

2-53 

2-55 

2-57 

2.60 

2.52 

2-55 

2-57 

2-59 

2.62 

23 

2.62 

2.64 

2.67 

2.69 

2.71 

2.64 

2.66 

2.68 

2.71 

2-73 

24 

2-73 

2.76 

2.78 

2.80 

2.82 

2-75 

2.78 

2.80 

2.82 

2.84 

25 

2.85 

2.87 

2.89 

2.91 

2.94 

2.87 

2.89 

2.91 

2.94 

2.96 

26 

2.96 

2.98 

3.01 

3-03 

3-05 

2.98 

3.00 

3-03 

3-05 

3-07 

27 

3-07 

3.10 

3.12 

3-14 

3-16 

3.10 

3.12 

3-14 

3-16 

3-19 

28 

3.19 

3.21 

3-23 

3-25 

3-28 

3-21 

3-23 

3-25 

3-28 

3-30 

29 

3-30 

332 

3-34 

3-37 

3-39 

3-32 

3-35 

3-'37 

3-39 

3-4i 

30 

3-4i 

3-44 

3-46 

3-48 

3-50 

3-44 

3-46 

3-48 

3-51 

3-53 

3i 

3-53 

3-55 

3-57 

3-59 

3-62 

3-55 

3-57 

3-6o 

3-62 

3-64 

32 

3-64 

3-66 

3-68 

3-7i 

3-73 

3-66 

3-69 

3-71 

3-73 

3-76 

33 
34 

3-75 
3-87 

3-77 
3-89 

3-8o 
3-9i 

3-82 
3-93 

3-84 
3.96 

3-78 
3.89 

3-8o 
3-92 

3-82 
3-94 

3 

3.87 
3.98 

35 

3.98 

4.00 

4.02 

4-05 

4.07 

4.01 

4-03 

4-05 

4-07 

4.10 

SMITHSONIAN  TABLES. 


47 


TABLE  11. 
REDUCTION    OF   THE    BAROMETER   TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

71O  mm. 

HEIGHT   OF   THE   BAROMETER 

715  mm. 

>  Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

O.O2 

0.05 

0.07 

0.09 

0.00 

0.02 

0.05 

0.07 

0.09 

i 

.12 

.14 

.16 

•19 

..21 

.12 

.14 

.16 

•J9 

.21 

2 

•23 

.26 

.28 

•30 

•32 

•23 

.26 

.28 

•30 

•33 

3 

•35 

•37 

•39 

.42 

•44 

•35 

•37 

.40 

.42 

•44     ' 

4 

.46 

•49 

•51 

•53 

.56 

•47 

•49 

•51 

•  54 

•56 

5 

0.58 

0.60 

0.63 

0.65 

0.67 

0.58 

0.61 

0.63 

0.65 

0.68 

6 

.70 

•  72 

•74 

.76 

•79 

.70 

•  72 

•75 

•77 

•79 

7 

.81 

•83 

.86 

.88 

.90 

.82 

•84 

.86 

•89 

•9i 

8 

•93 

•95 

•97 

1.  00 

1.02 

•93 

.96 

.98 

I.OO 

•03 

9 

1.04 

1.07 

1.09 

i.  ii 

I-I3 

1.05 

1.07 

1.  10 

1.  12 

.14 

10 

.16 

.18 

.20 

1.23 

•25 

1.17 

.19 

.21 

.24 

.26 

ii 

.27 

•30 

•32 

1-34 

•37 

1.28 

•31 

•33 

•35 

•38 

12 

i-39 

.41 

•44 

1.46 

.48 

1.40 

•42 

•45 

•47 

•49 

13 

•50 

•53 

•55 

i-57 

.60 

1-52 

•54 

•56 

•58 

.61 

14 

.62 

.64 

•  67 

1.69 

•  71 

1-63 

•65 

.68 

.70 

•72 

15 

•74 

•  76 

.78 

i.  80 

•83 

i-75 

•  77 

i-79 

.82 

.84 

16 

•85 

.87 

.90 

1.92 

•94 

1.86 

.89 

1.91 

•93 

.96 

i? 

•97 

•99 

2.OT 

2.04 

2.06 

1.98 

2.OO 

2.03 

2.05 

2.07 

18 

2.08 

2.  IO 

2.13 

2.15 

2.17 

2.IO 

2.12 

2.14 

2.17 

2.19 

19 

2.  2O 

2.22 

2.24 

2.27 

2.29 

2.21 

2.24 

2.26 

2.28 

2.30 

20 

2.3I 

2-33 

2.36 

2.38 

2.40 

2-33 

2-35 

2.37 

2.40 

2.42 

21 

2-43 

2.45 

2-47 

2.50 

2.52 

2.44 

2.47 

2.49 

2.51 

2-54 

22 

2-54 

2-57 

2-59 

2.61 

2.63 

2.56 

2.58 

2.61 

2.63 

2.65 

23 

2.66 

2.68 

2.7O 

2-73 

2-75 

2.68 

2.70 

2.72 

2-75 

2.77 

24 

2.77 

2.80 

2.82 

2.84 

2.86 

2-79 

2.81 

2.84 

2.86 

2.88 

25 

2.89 

2.9I 

2-93 

2.96 

2.98 

2.91 

2.93 

2-95 

2.98 

3.00 

26 

3.00 

3-03 

3-05 

3-07 

3-09 

3.02 

3.05 

3-07 

3-09 

3.12 

27 

3.12 

3-H 

3-16 

3-19 

3-21 

3-14 

3.16 

3-19 

3-21 

3-23 

28 

3.23 

3-25 

3-28 

3-30 

3-32 

3-25 

3.28 

3-30 

3.32 

3-35 

29 

3-35 

3-37 

3-39 

3-42 

3-44 

3-37 

3-39 

3-42 

3-44 

3-46 

30 

346 

3-48 

3-51 

3-53 

3-55 

3-49 

3-51 

3-53 

3-56 

3.58 

3i 

3.58 

3-6o 

3-62 

3-65 

3-67 

3-6o 

3-62 

3.65 

3-67 

3-69 

32 

3.69 

3-7i 

3-74 

3-76 

3-78 

.    3-72 

3-74 

3-76 

3-79 

3-8i 

33 

3-8i 

3-83 

3-85 

3-87 

3-90 

3-83 

3.86 

3-88 

3-90 

3-92 

34 

3-92 

3-94 

3-97 

3-99 

4.01 

3-95 

3-97 

3-99 

4.02 

4.04 

35 

4-03 

4.06 

4.08 

4.10 

4-13 

4.06 

4.09 

4.11 

4-13 

4.16 

SMITHSONIAN  TABLES. 


48 


TABLE  n 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

72O  mm. 

HEIGHT   OP   THE   BAROMETER 

725  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.05 

0.07 

0.09 

O.OO 

O.O2 

0.05 

0.07 

0.09 

i 

.12 

.14 

.16 

•19 

.21 

.12 

•14 

•17 

•19 

.21 

2 

•24 

.26 

.28 

•31 

•33 

.24 

.26 

.28 

•31 

•33 

3 

•35 

.38 

.40 

•42 

•45 

•36 

•38 

.40 

•43 

•45 

4 

•47 

•49 

•52 

•54 

•56 

•47 

•50 

•52 

•54 

•57 

5 

o-59 

0.61 

0.63 

0.66 

0.68 

o-59 

O.62 

0.64 

0.66 

0.69 

6 

•  7i 

•73 

•75 

•78 

.80 

•  71 

•73 

•76 

.78 

.80 

7 

.82 

•85 

.87 

.89 

.92 

•83 

•85 

.88 

.90 

.92 

8 

•94 

.96 

•99 

1.  01 

1.03 

•95 

•97 

•99 

1.02 

1.04 

9 

1.06 

1.08 

1.  10 

•13 

1.15 

1.06 

1.09 

i.  ii 

I.I4 

1.16 

10 

•17 

i.  20 

.22 

•  24 

1.27 

.18 

1.  21 

1.23 

1.25 

1.28 

ii 

•29 

1.31 

•34 

•36 

i-39 

•30 

1.32 

i-35 

1-37 

1.39 

12 

.41 

i-43 

.46 

.48 

1.50 

.42 

1-44 

•47 

1.49 

1-51 

13 

•53 

i-55 

•57 

i.  60 

1.62 

•  54 

1.56 

•58 

1.61 

1.63 

14 

.64 

1.67 

.69 

1.71 

1.74 

•65 

1.68 

1.70 

1-73 

1-75 

15 

.76 

1.78 

1.81 

1.83 

1.85 

•  77 

1.80 

.82 

1.84 

1.87 

16 

.88 

1.90 

1.92 

1.97 

•89 

1.91 

•94 

1.96 

1.98 

17 

•99 

2.  02 

2.04 

2.06 

2.09 

2.01 

2.03 

2.05 

2.08 

2.  IO 

18 

2.  II 

2.13 

2.16 

2.18 

2.20 

2.13 

2.15 

2.17 

2.20 

2.22 

19 

2.23 

2.25 

2.27 

2.30 

2.32 

2.24 

2.27 

2.29 

2.31 

2-34 

20 

2-34 

2-37 

2-39 

2.41 

2.44 

2.36 

2.38 

2.41 

2.'43 

2-45 

21 

2.46 

2.48 

2-51 

2.53 

2-55 

2.48 

2.50 

2.53 

2-55 

2-57 

22 

2.58 

2.60 

2.62 

2.65 

2.67 

2.60 

2.62 

2.64 

2.67 

2.69 

23 

2.69 

2.72 

2-74 

2.76 

2.79 

2.71 

2.74 

2.76 

2.78 

2.81 

24 

2.81 

2.83 

2.86 

2.88 

2.90 

2.83 

2.85 

2.88 

2.90 

2.92 

25 

2.93 

2-95 

2.97 

3-00 

3.02 

2.95 

2.97 

3-00 

3-02 

3.04 

26 

3.04 

3-07 

3-09 

3-14 

3-07 

3-09 

3-14 

3.16 

27 

3.16 

3-18 

3-2i 

3-23 

3-25 

3.l8 

3-2i 

3-23 

3.25 

3.28 

|      28 

3.28 

3-30 

3-32 

3-35 

3-37 

3-30 

3-32 

3-35 

3-37 

3-39 

29 

3-39 

3-42 

3-44 

3-46 

3-49 

3-42 

3-44 

3-46 

3-49 

3-51 

30 

3  51 

3-53 

3.56 

3.58 

3-6o' 

3-53 

3-56 

3-58 

3-6o 

3-63 

31 

3^3 

'  3-65 

3-67 

3-70 

3-72 

3-65 

3-68 

3-70 

3-72 

3-75 

32 

3-74 

3-77 

3-79 

3-8i 

3-84 

3-77 

3-79 

3-82 

3-84 

3-86 

33 

3-86 

3-88 

3-91 

3-93 

3-95 

3-89 

3-91 

3-93 

3.96 

3.98 

24 

3.98 

4.00 

4.02 

4-05 

4.07 

4.00 

4-03 

4-05 

4.07 

4.10 

35 

4.09 

4.11 

4.14 

4.16 

4.18 

4.12 

4.14 

4.17 

4.19 

4.21 

SMITHSONIAN  TABLES. 


49 


TABLE   11. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE.  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


FIEIGHT   OF   THE   BAROMETER 

730  mm. 

HEIGHT   OF  THE   BAROMETER 

735  mm. 

Attached 
Ther- 

mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.02 

0.05 

0.07 

0.10 

0.00 

0.02 

0.05 

0.07 

o.  10 

i 

.12 

.14 

•17 

•!9 

.21 

.12 

.14 

•17 

.19 

.22 

2 

.24 

.26 

.29 

•31 

•33 

.24 

.26 

•29 

•31 

•34 

3 

.36 

.38 

.41 

•43 

•45 

•36 

•38 

.41 

•43 

•46 

4 

.48 

•50 

•52 

•55 

•57 

.48 

•50 

•53 

•55 

•58 

5 

0.60 

O.62 

0.64 

0.67 

0.69 

O.6o 

O.62 

0.65 

0.67 

0.70 

6 

•71 

•  74 

•76 

•79 

.81 

.72 

•  74 

•  77 

•79 

.82 

7 

•83 

.86 

.88 

•9i 

•93 

.84 

.86 

.89 

•91 

•94 

8 

•95 

.98 

1.  00 

1.02 

1.05 

.96 

.98 

I.OI 

1.03 

1.06 

9 

1.07 

1.  10 

1.  12 

I.I4 

1.17 

1.  08 

I.IO 

!-!3 

i-i5 

1.17 

10 

1.19 

.21 

.24 

1.26 

1.29 

.20 

.22 

1.25 

1.27 

.29 

n 

1-31 

•33 

•36 

1.38 

1.40 

•32 

1-34 

1-37 

i-39 

.41 

12 

1-43 

•45 

•48 

1-50 

1.52 

•44 

1.46 

•49 

1-51 

•53 

13 

1-55 

•57 

•59 

1.62 

1.64 

•56 

1.58 

.61 

1.63 

•65 

14 

1.67 

.69 

•  7i 

1.74 

1.76 

.68 

1.70 

•72 

1-75 

•  77 

15 

1.78 

.81 

1.83 

1.86 

1.88 

.80 

1.82 

•84 

1.87 

1.89 

16 

1.90 

•93 

i-95 

1.97 

2.00 

•92 

1.94 

.96 

1.99 

2.OI 

17 

2.02 

2.05 

2.07 

2.09 

2.12 

2.04 

2.06 

2.08 

2.  II 

2.13 

18 

2.14 

2.16 

2.19 

2.21 

2.23 

2.15 

2.18 

2.20 

2.23 

2.25 

19 

2.26 

2.28 

2.31 

2-33 

2-35 

2.27 

2.30 

2.32 

2-35 

2-37 

20 

2.38 

2.40 

2.42 

2-45 

2.47 

2-39 

2.42 

2.44 

2.46 

2.49 

21 

2.50 

2.52 

2-54 

2-57 

2-59 

2.51 

2-54 

2.56 

2.58 

2.61 

22 

2.61 

2.64 

2.66 

2.68 

2.71 

2.63 

2.66 

2.68 

2.70 

2.73 

23 

2.73 

2.76 

2.78 

2.80 

2.83 

2-75 

2.77 

2.80 

2.82 

2.85 

24 

2.85 

2.87 

2.90 

2.92 

2.94 

2.87 

2.89 

2.92 

2.94 

2.97 

25 

2,97 

2-99 

3.02 

3-04 

3-06 

2-99 

3.01 

3-04 

3-06 

3.08 

26 

3-09 

3-ii 

3-13 

3.16 

3-i8 

3-H 

3-13 

3-i6 

3-18 

3.20 

27 

3-20 

3-23 

3-25 

3-28 

3-30 

3-23 

3-25 

3-27 

3-30 

3-32 

28 

3-32 

3-35 

3-37 

3-39 

3-42 

3-35 

3-37 

3-39 

3-42 

3-44 

29 

3.44 

3.46 

3-49 

3-5i 

3-54 

3-46 

3-49 

3-5i 

3-54 

3.56 

30 

3.56 

3-58 

3-6i 

3.63 

3-65 

3-58 

3-6i 

3-63 

3.65 

3-68 

31 

3.68 

3-70 

3-72 

3-75 

3-77 

3-70 

3-73 

3-75 

3-77 

3-8o 

32 

3.79 

3-82 

3-84 

3-87 

3-89 

3-82 

3-84 

3.87 

3-89 

3-92 

33 

3-91 

3-94 

3.96 

3.98 

4.01 

3-94 

3-96 

3-99 

4.01 

4-03 

34 

4.03 

4-05 

4.08 

4.10 

4.12 

4.06 

4.08 

4.11 

4-13 

4-15 

35 

4.15 

4.17 

4.20 

4.22 

4.24 

4.18 

4.20 

4.22 

4-25 

4.27 

SMITHSONIAN  TABLES. 


TABLE  11 

REDUCTION     OF  THE    BAROMETER   TO   STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

740  mm. 

HEIGHT   OF  THE   BAROMETER 

745  mm. 

1  Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

O.O2 

0.05 

0.07 

0.10 

0.00 

0.02 

0.05 

0.07 

O.IO 

i 

.12 

•15 

•17 

•19 

.22 

.12 

•15 

•17 

•19 

.22 

2 

.24 

.27 

.29 

•31 

•34 

.24 

.27 

.29 

•32 

•34 

3 

.36 

•39 

.41 

.44 

.46 

•37 

•39 

.41 

.44 

.46 

4 

.48 

•5i 

•53 

•56 

•58 

•49 

•Si 

•54 

•56 

.58 

5 

6.60 

0.63 

0.65 

0.68 

0.70 

0.61 

0.63 

0.66 

0.68 

0.71 

6 

.72 

•75 

•77 

.80 

.82 

•73 

•75 

•  78 

.80 

•83 

7 

•85 

.87 

.89 

.92 

•94 

•85 

.88 

.90 

•92 

•95 

8 

•97 

•99 

1.  01 

.04 

i.  06 

•97 

I.OO 

1.02 

1.05 

1.07 

9 

1.09 

i.  ii 

1-13 

.16 

1.18 

1.09 

1.  12 

I.I4 

1.17 

1.19 

10 

.21 

•23 

1.26 

.28 

1.30 

1.22 

1.24 

1.26 

1.29 

i-3i 

ii 

•33 

•35 

1.38 

.40 

1.42 

i-34 

1.36 

1.38 

1.41 

1-43 

12 

•45 

•47 

1.50 

•52 

i-54 

•46 

1.48 

I-5I 

i-53 

i-55 

13 

•57 

•59 

1.62 

.64 

1.66 

•58 

1.  60 

1.63 

1-65 

1.68 

14 

.69 

•7i 

1.74 

•76 

1.78 

.70 

1.72 

1-75 

1.77 

1.80 

15 

.81 

•83 

1.86 

1.88 

1.90 

.82 

1.85 

1.87 

1.89 

1.92 

16 

•93 

•95 

1.98 

2.00 

2.03 

•94 

1.97 

1.99 

2.01 

2.04 

17 

2.05 

2.07 

2.10 

2.12 

2.15 

2.06 

2.09 

2.  II 

2.14 

2.16 

18 

2.17 

2.19 

2.22 

2.24 

2.27 

2.18 

2.21 

2.23 

2.26 

2.28 

19 

2.29 

2.31 

2-34 

2.36 

2-39 

2.31 

2-33 

2.35 

2.38 

2.40 

20 

2.41 

2-43 

2.46 

2.48 

2.51 

2-43 

2-45 

2-47 

2.50 

2.52 

21 

2-53 

2-55 

2.58 

2.6O 

2.63 

2-55 

2-57 

2.59 

2.62 

2.64 

22 

2.65 

2.67 

2.7O 

2.72 

2.75 

2.67 

2.69 

2.72 

2-74 

2.76 

23 

2.77 

2.79 

2.82 

2.84 

2.87 

2-79 

2.8l 

2.84 

2.86 

2.88 

24 

2.89 

2.91 

2.94 

2.96 

2.99 

2.91 

2-93 

2.96 

2.98 

3.01 

25 

3.01 

3-03 

3-06 

3-08 

3-ii 

3-03 

3-05 

3.08 

3.10 

3-J3 

26 

3-J3 

3.15 

3-18 

3-20 

3-22 

3-15 

3-17 

3.20 

3-22 

3-25 

27 

3-25 

3-27 

3-30 

3-32 

3-34 

3-27 

3-29 

3-32 

3-34 

3-37 

,28 

3-37 

3-39 

3-42 

3-44 

3-46 

3-39 

3-42 

3-44 

3-46 

3-49 

29 

3-49 

3-5i 

3-54 

3-56 

3.58 

3-5i 

3-54 

3.56 

3.58 

3-6i 

30 

3.61 

3-63 

3-66 

3-68 

3-70 

3-63 

3-66 

3-68 

3-70 

3-73 

3i 

3-73 

3-75 

3-78 

3-8o 

3.82 

3-75 

3-78 

3-8o 

3-82 

3-85 

32 

3-85 

3.87 

3-89 

3-92 

3-94 

3-87 

3-90 

3-92 

3-95 

3-97 

33 

3-97 

3-99 

4.01 

4.04 

4.06 

3-99 

4.02 

4.04 

4.07 

4.09 

34 

4.09 

4.11 

4-i3 

4.16 

4.18 

4.11 

4.14 

4.16 

4.19 

4.21 

35 

4.21 

4-23 

4-25 

4.28 

4-30 

4-23 

4.26 

4.28 

4-31 

4.33 

SMITHSONIAN  TABLES. 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER    TO    STANDARD    TEMPERATURE. 

METRIC     MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

750  mm. 

HEIGHT   OF   THE   BAROMETER 

755  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.05 

0.07 

O.IO 

O.OO 

O.O2 

0.05 

0.07 

O.IO 

i 

.12 

•15 

•17 

.20 

.22 

.12 

•15 

•17 

.20 

.22 

2 

•25 

•27 

.29 

•32 

•34 

•25 

.27 

•30 

•32 

•35 

3 

•37 

•39 

.42 

•44 

•47 

•37 

•39 

•42 

•44 

•47 

4 

•49 

•51 

•54 

.56 

•59 

•49 

•52 

•54 

•57 

•59 

5 

0.61 

0.64 

0.66 

0.69 

0.71 

0.62 

0.64 

0.67 

0.69 

0.71 

6 

•73 

.76 

.78 

.81 

•83 

•74 

•76 

•79 

.81 

.84 

7 

.86 

.88 

•9i 

•93 

•95 

.86 

.89 

•9i 

•94 

.96 

8 

.98 

I.OO 

1.03 

1.05 

1.08 

•99 

1.  01 

1.03 

1.06 

.08 

9 

1.  10 

•13 

1-15 

1.17 

i.  20 

i.  ii 

1-13 

1.16 

1.18 

.21 

10 

.22 

•25 

1.27 

1.30 

1.32 

1.23 

1.26 

1.28 

1-31 

•*3 

ii 

•35 

•37 

i-39 

1.42 

1.44 

i-35 

1.38 

1.40 

1-43 

•45 

12 

•47 

•49 

1-52 

i-54 

1.56 

1.48 

1.50 

1-53 

i-55 

•58 

13 

•59 

.61 

1.64 

1.66 

1.69 

i.  60 

1.62 

1.65 

1.67 

.70 

14 

•7i 

•74 

1.76 

1.78 

1.81 

1.72 

1-75 

1.77 

1.80 

.82 

15 

1.83 

.86 

i.S8 

1.91 

i-93 

1.85 

1.87 

1.89 

1.92 

1.94 

16 

1.96 

.98 

2.00 

2.03 

2.05 

1.97 

1.99 

2.02 

2.04 

2.07 

17 

2.08 

2.10 

2.13 

2.15 

2.17 

2.09 

2.12 

2.14 

2.16 

2.19 

iS 

2.  2O 

2.22 

2.25 

2.27 

2.30 

2.21 

2.24 

2.26 

2.29 

2.31 

19 

2.32 

2-34 

2-37 

2-39 

2.42 

2-34 

2.36 

2.38 

2.41 

2.43 

20 

2.44 

2.47 

2.49 

2.52 

2-54 

2.46 

2.48 

2.51 

2.53 

2.56 

21 

2.56 

2-59 

2.61 

2.64 

2.66 

2.58 

2.6l 

2.63 

2.65 

2.68 

22 

2.69 

2.71 

2.73 

2.76 

2.78 

2.70 

2-73 

2-75 

2.78 

2.80 

23 

2.81 

2.83 

2.86 

2.88 

2.90 

2.83 

2.85 

2.87 

2.90 

2.92 

24 

2.93 

2-95 

2.98 

3.00 

3-03 

2-95 

2.97 

3.00 

3.02 

3-05 

25 

3.05 

3-07 

3.10 

3.12 

3-15 

3-07 

3-09 

3.12 

3-i4 

3-17 

26 

3-17 

3.20 

3.22 

3-24 

3-27 

3-19 

3.22 

3-24 

3-27 

3-29 

27 

3.29 

3-32 

3-34 

3-37 

3-39 

3-31 

3-34 

3-36 

3-39 

3-41 

28 

3.41 

3-44 

3-46 

3-49 

3-51 

3-44 

3-46 

3-49 

3-51 

3-53 

29 

3-54 

3.56 

3-58 

3-6i 

3.63 

3.56 

3.58 

3-61 

3-63 

3-66 

30 

3-66 

3-68 

3.71 

3-73 

3-75 

3-68 

3-71 

3-73 

3-75 

3.78 

3i 

3-78 

3-8o 

3-83 

3.85 

3-87 

3.80 

3-83 

3-85 

3.88 

3-90 

32 

3-90 

3-92 

3-95 

3-97 

4.00 

3-92 

3-95 

3-97 

4.00 

4.02 

33 

4.02 

4.04 

4.07 

4.09 

4.12 

4-05 

4.07 

4.10 

4.12 

4.14 

34 

4.14 

4.17 

4.19 

4.21 

4-24 

4.17 

4.19 

4.22 

4.24 

4.27 

35 

4.26 

4.29 

4-31 

4-33 

4-36 

4.29 

4-31 

4-34 

4-36 

4-39 

SMITHSONIAN  TABLES. 


TABLE  11, 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT    OF   THE   BAROMETER 

76O  mm. 

HEIGHT  OP  THE  BAROMETER 

765  mm. 

Attached 
Ther- 

mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.02 

0.05 

0.07 

O.IO 

0.00 

0.03 

0.05 

0.07 

O.IO 

i 

.12 

•15 

•17 

.20 

.22 

•13 

•15 

•17 

.20 

.22 

2 

•25 

.27 

•30 

•32 

•35 

•25 

•27 

•30 

•32 

•35 

3 

•37 

.40 

.42 

•45 

•47 

•37 

.40 

.42 

•45 

•47 

4 

-50 

•52 

•55 

•  57 

.60 

•50 

•52 

•55 

•57 

.60 

5 

0.62 

0.65 

0.67 

0.69 

0.72 

0.62 

0.65 

0.67 

0.70 

0.72 

6 

•74 

•77 

•79 

.82 

.84 

•75 

•77 

.80 

.82 

•85 

7 

.87 

.89 

•92 

.94 

•97 

•87 

.90 

.92 

•95 

•97 

8 

•99 

.02 

1.04 

1.07 

1.09 

1.  00 

.02 

1.05 

1.07 

1.  10 

9 

1.  12 

.14 

1.17 

1.19 

1.  21 

1.  12 

•15 

I.I7 

1.20 

1.22 

10 

1.24 

.26 

1.29 

1-31 

i-34 

1-25 

•27 

1-30 

1.32 

1-35 

ii 

1.36 

•39 

1.41 

1.44 

1.46 

i-37 

.40 

1.42 

i-45 

1.47 

12 

1.49 

•  Si 

i-54 

1.56 

J-59 

1.50 

•52 

i-55 

i-57 

1.60 

13 

1.61 

.64 

1.66 

1.68 

1.71 

1.62 

•65 

-  1.67 

1.70 

1.72 

14 

1-73 

•  76 

!.78 

1.81 

1.83 

1-75 

•77 

i.  80 

1.82 

1.85 

15 

1.86 

1.88 

1.91 

i-93 

1.96 

1.87 

1.89 

1.92 

1.94 

1.97 

16 

1.98 

2.01 

2.03 

2.06 

2.08 

1.99 

2.02 

2.04 

2.07 

2.09 

17 

2.10 

2.13 

2-15 

2.18 

2.20 

2.12 

2.14 

2.17 

2.19 

2.22 

18 

2.23 

2.25 

2.28 

2.30 

2-33 

2.24 

2.27 

2.29 

2.32 

2.34 

19 

2-35 

2.38 

2.40 

2.43 

2-45 

2-37 

2-39 

2.42 

2-44 

2.47 

20 

2.47 

2.50 

2.52 

2-55 

2-57 

2.49 

2.52 

2-54 

2-57 

2-59 

21 

2.60 

2.62 

2.65 

2.67 

2.70 

2.62 

2.64 

2.66 

2.69 

2.71 

22 

2.72 

2-75 

2-77 

2.80 

2.82 

2.74 

2.76 

2.79 

2.81 

2.84 

23 

2.84 

2.87 

2.89 

2.92 

2-94 

2.86 

2.89 

2.91 

2.94 

2.96 

24 

2-97 

2.99 

3-02 

3-°4 

3-07 

2.99 

3.01 

3-04 

3.06 

3-09 

25 

3-09 

3.12 

3-14 

3-i6 

3-19 

3-n 

3-14 

3-i6 

3.19 

3-21 

26 

27 

3-21 

3-34 

3-24 
3-36 

3.26 

3-39 

3-29 
3-4i 

3-31 

3-43 

3-23 
3.36 

3-26 
3.38 

3.28 
3-41 

3.31 

3-43 

3.33 
3-46 

28 

346 

3-48 

3-5i 

3-53 

3-56 

3-48 

3-51 

3-53 

3.56 

3.58 

29 

3.58 

3-6i 

3-63 

3-66 

3.68 

3-6i 

3.63 

3-66 

3-68 

3-70 

30 

3-7i 

3-73 

3-75 

3-78 

3-8o 

3-73 

3-75 

3.78 

3-8o 

3.83 

3i 

3-83 

3.85 

3-88 

3-90 

3-93 

3-85 

3-88 

3-90 

3-93 

3-95 

32 

3-95 

3.98 

4.00 

4.02 

4-05 

3-98 

4.00 

4-03 

4-05 

4.08 

33 

4.07 

4.10 

4.12 

4-15 

4.17 

4.10 

4-13 

4-15 

4.17 

4.20 

34 

4.20 

4.22 

4-25 

4.27 

4.29 

4.22 

4-25 

4.27 

4-30 

4-32 

35 

4-32 

4-34 

4-37 

4-39 

4.42 

4-35 

4-37 

4.40 

4.42 

4-45 

SMITHSONIAN  TABLES. 


TABLE  11. 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD   TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

770  mm. 

HEIGHT   OP  THE   BAROMETER 

775  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.03 

0.05 

0.08 

O.IO 

0.00 

0.03 

0.05 

0.08 

O.IO 

i 

•13 

•15 

.18 

.20 

•23 

•13 

•'5 

.18 

.20 

•23 

2 

•25 

.28 

•30 

•33 

•35 

•25 

.28 

•30 

•33 

•35 

3 

•38 

.40 

•43 

•45 

.48 

•38 

.40 

•43 

.46 

•48 

4 

•50 

•53 

•55 

.58 

.60 

•51 

•53 

•56 

-58 

.61 

5 

0.63 

0.65 

0.68 

0.70 

0-73 

0.63 

0.66 

0.68 

0.71 

0-73 

6 

•75 

•  78 

.80 

.83 

•85 

.76 

.78 

.81 

.   -83 

.86 

7 

.88 

.90 

•93 

•95 

.98 

.89 

.91 

•94 

.96 

•99 

8 

.01 

•03 

i.  06 

1.08 

.11 

.OI 

1.04 

.06 

1.09 

i.  ii 

9 

1-13 

.16 

i.iS 

1.  21 

•23 

.14 

1.16 

•!9 

1.  21 

1.24 

10 

.26 

.28 

1-31 

•33 

•36 

.26 

.29 

•3T 

1-34 

1.36 

ii 

•38 

.41 

i-43 

.46 

.48 

i-39 

.42 

•  44 

1.47 

1.49 

12 

•5i 

•53 

•56 

•58 

.61 

1-52 

•54 

•57 

J-59 

1.62 

13 

•63 

.66 

.68 

.71 

•73 

.64 

.67 

.69 

1.72 

1.74 

N 

.76 

•  78 

1.81 

•83 

.86 

•77 

•79 

1.82 

1.84 

1.87 

15 

1.88 

1.91 

i-93 

1.96 

1.98 

1.89 

1.92 

1.94 

1.97 

2.OO 

16 

2.OI 

2.03 

2.06 

2.08 

2.  II 

2.02 

2.05 

2.07 

2.10 

2.12 

17 

2.13 

2.16 

2.18 

2.21 

2.23 

2.15 

2.17 

2.20 

2.22 

2.25 

18 

2.26 

2.28 

2.31 

2-33 

2.36 

2.27 

2.30 

2.32 

2.35 

2-37 

J9 

2.38 

2.41 

2-43 

2.46 

2.48 

2.4O 

2.42 

2.45 

2.47 

2.50 

20 

2.51 

2-53 

2.56 

2.58 

2.61 

2.52 

2-55 

2-57 

2.60 

2.62 

21 
22 

2.63 
2.76 

2.66 
2.78 

2.68 
2.81 

2.71 
2.83 

2-73 
2.86 

2.65 
2.77 

2.67 
2.80 

2.70 
2.83 

2.72 

2.85 

2-75 

2.88 

23 
24 

2.88 
3.01 

2.91 

3-03 

2-93 
3-o6 

2.96 
3-08 

2.98 
3-n 

2.90 

3-03 

2-93 

3-05 

2.95 
3.08 

2.98 
3.10 

3.00 
3-13 

25 

3-13 

3-i6 

3.18 

3.21 

3-23 

3-15 

3-i8 

3.20 

3.23 

3-25 

26 

3-26 

3-28 

3-31 

3-33 

3.36 

3-28 

3-30 

3-33 

3-35 

3.38 

27 

3.38 

3-41 

3-43 

3-46 

3-48 

3-40 

3-43 

3-45 

3-48 

3-50 

28 

3-51 

3-53 

3.56 

3.58 

3-60 

3-53 

3-55 

3-58 

3-6o 

3-63 

29 

3.63 

3.65 

3-68 

3-70 

3-73 

3.65 

3-68 

3-70 

3-73 

3-75 

30 

3-75 

3.78 

3-8o 

3-83 

3.85 

3-78 

3-8o 

3.83 

3-85 

3.88 

3i 

3-88 

3-90 

3-93 

3-95 

3.98 

3-90 

3-93 

3-95 

3.98 

4.00 

32 

4.00 

4-03 

4-05 

4.08 

4.10 

4-03 

4-05 

4.08 

4.10 

4-13 

33 

4.13 

4-15 

4.18 

4.20 

4-23 

4-15 

4.18 

4.20 

4-23 

4-25 

34 

4-25 

4.28 

4-30 

4-33 

4-35 

4.28 

4-30 

4-33 

4-35 

4.38 

35 

4.38 

4.40 

4-43 

4-45 

4-48 

4.40 

4-43 

4-45 

4.48 

4-50 

SMITHSONIAN  TABLES. 


54 


TABLE  11 
REDUCTION    OF  THE    BAROMETER   TO    STANDARD  TEMPERATURE. 

METRIC    MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE    BAROMETER 

780  mm. 

HEIGHT    OF   THE   BAROMETER 

785  mm. 

Attached 
Ther- 
mometer. 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

0.00 

0.03 

0.05 

0.08 

0.10 

o.oo 

0.03 

0.05 

0.08 

0.10 

i 

•J3 

•15 

.18 

.20 

•23  ' 

•  13 

•15 

.18 

.21 

•23 

2 

•25 

.28 

•31 

•33 

•36 

.26 

.28 

•31 

•33 

.36 

3 

•38 

.41 

•43 

.46 

.48 

.38 

.41 

.44 

.46 

•49 

4 

•51 

•53 

•56 

•59 

.61 

•51 

•54 

•56 

•59 

.62 

5 

0.64 

0.66 

0.69 

0.71 

0.74 

0.64 

0.67 

0.69 

0.72 

0.74 

6 

.76 

•79 

.81 

.84 

•87 

•  77 

•79 

.82 

•85 

.87 

7 

.89 

.92 

•9.4 

•97 

•99 

.90 

.92 

•95 

•97 

.00 

8 

I.  O2 

.04 

1.07 

.09 

.12 

.02 

1.05 

i.  08 

.10 

•13 

9 

I.I5 

•17 

i.  20 

.22 

•25 

•15 

1.18 

1.20 

•23 

•25 

10 

1.27 

•30 

1.32 

•35 

•37 

.28 

i-3i 

1-33 

.36 

•38 

ii 

12 

1.40 

T-53 

.42 

•55 

is 

•48 
.60 

•50 
•63 

.41 

•54 

i-43 
1.56 

1.46 

i-59 

.48 
.61 

•  5i 
.64 

J3 

1.65 

1.68 

1.70 

1-73 

•75 

.66 

1.69 

1.71 

1.74 

•77 

14 

1.78 

1.81 

1.83 

1.86 

.88 

•79 

1.82 

1.84 

1.87 

•89 

15 

1.91 

i-93 

i.96 

1.98 

2.OI 

1.92 

1.94 

1.97 

2.00 

2.02 

16 

2.03 

2.06 

2.08 

2.  II 

2.13 

2.05 

2.07 

2.IO 

2.12 

2.15 

17 

2.16 

2.19 

2.21 

2.24 

2.26 

2.17 

2.20 

2.22 

2.25 

2.28 

18 

2.29 

2.31 

2-34 

2.36 

2-39 

2.30 

2-33 

2-35 

2.38 

2.4O 

J9 

2.41 

2.44 

2.46 

2.49 

2.51 

2-43 

2-45 

2.48 

2-51 

2-53 

20 

2-54 

2-57 

'2-59 

2.62 

2.64 

2.56 

2.58 

2.6l 

2.63 

2.66 

21 

2.67 

2.69 

2.72 

2.74 

2.77 

2.68 

2.71 

2.73 

2.76 

2.79 

22 

2-79 

2.82 

2.84 

2.87 

2.89 

2.81 

2.84 

2.86 

2.89 

2.91 

23 

2.92 

2.94 

2.97 

3.00 

3.02 

2.94 

2.96 

2.99 

3.01 

3-04 

24 

3-°5 

3-07 

3.10 

3.12 

3-15 

3-07 

3-°9 

3.12 

3-14 

3-i7 

25 

3-17 

3.20 

3-22 

3-25 

3-27 

3-19 

3-22 

3-24 

3.27 

3-29 

26 

3-30 

3-32 

3-35 

3-37 

3-40 

3.32 

3-34 

3-37 

3-40 

3-42 

27 

3-42 

3-45 

3-47 

3-50 

3-53 

3.45 

3-47 

3-50 

3-52 

3-55 

28 

3-58 

3-60 

3-63 

3-65 

3-57 

3-6o 

3-62 

3-65 

3-67 

29 

3.68 

3-70 

3-73 

3-75 

3-78 

3-7o 

3-73 

3-75 

3-78 

3-80 

30 

3-80 

3-83 

3-85 

3-88 

3-90 

3-83 

3.85 

3-88 

3-90 

3-93 

31 

3-93 

3-95 

3-98 

4.00 

4-03 

3-95 

3.98 

4.00 

4-03 

4.06 

32 

4-05 

4.08 

4.11 

4-13 

4.16 

4.08 

4.11 

4.13 

4.l6 

4.18 

33 

4.18 

4.21 

4-23 

4.26 

4.28 

4.21 

4-23 

4.26 

4.28 

4-31 

34 

4-31 

4-33 

4.36 

4-38 

4.41 

4-33 

4-36 

4-39 

4.41 

4-44 

35 

4-43 

4.46 

4.48 

4-51 

4-53 

4.46 

4-49 

4.5i 

4-54 

4.56 

SMITHSONIAN  TABLES. 


55 


TABLE  11. 

REDUCTION    OF  THE    BAROMETER    TO    STANDARD    TEMPERATURE. 

METRIC     MEASURES. 

FOR  TEMPERATURES  ABOVE  0°  CENTIGRADE,  THE  CORRECTION  IS  TO  BE  SUBTRACTED. 


HEIGHT   OF   THE   BAROMETER 

790  mm. 

HEIGHT  OF  THE  BAROMETER 

795  mm. 

Attached 
Ther- 
mometer 

0?0 

0?2 

0?4 

0?6 

0?8 

0?0 

0?2 

0?4 

0?6 

0?8 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

O.OO 

0.03 

0.05 

0.08 

O.IO 

0.00 

0.03 

0.05 

O.o8 

O.IO 

i 

•13 

•15 

.18 

.21 

•23 

•13 

.16 

.18 

.21 

•23 

2 

.26 

.28 

•31 

•34 

.36 

.26 

.29 

•31 

•34 

.36 

3 

•39 

.41 

•44 

.46 

•49 

•39 

.42 

•44 

•47 

•49 

4 

•52 

•54 

•57 

•59 

.62 

•52 

•55 

•57 

.60 

.62 

5 

0.64 

0.67 

0.70 

0.72 

o.75 

0.65 

0.67 

0.70 

0.73 

o.75 

6 

•  77 

.80 

•83 

•85 

.88 

.78 

.80 

•83 

.86 

.88 

8 

.90 

1.03 

3 

i.o9i 

.98 
.11 

1.  01 

i-i3 

•91 
1.04 

r!o6 

.96 
1.09 

•99 

1.  12 

I.OI 

1.14 

9 

1.16 

•19 

1.  21 

•24 

1.26 

1.17 

1.19 

1.22 

.24 

1.27 

10 

1.29 

•31 

i-34 

•37 

i-39 

1.30 

1.32 

i-35 

•37 

.40 

IT 

1.42 

•44 

1.47 

•49 

1.52 

i-43 

i-45 

1.48 

•50 

•53 

12 

i-55 

•57 

1.60 

.62 

1-65 

1.56 

1.58 

1.61 

•63 

.66 

13 

1.67 

.70 

1-73 

•75 

1.78 

1.68 

1.71 

1.74 

1.76 

•79 

14 

1.80 

•83 

1.85 

1.88 

1.91 

1.81 

1.84 

1.87 

1.89 

.92 

15 

i-93 

1.96 

1.98 

2.01 

2.03 

1.94 

1.97 

1.99 

2.O2 

2.05 

16 

2.06 

2.09 

2.II 

2.14 

2.16 

2.07 

2.10 

2.12 

2.15 

2.18 

17 

2.19 

2.21 

2.24 

2.26 

2.29 

2.20 

2.23 

2.25 

2.28 

2.30 

18 

2.32 

2.34 

2-37 

2.39 

2.42 

2-33 

2.36 

2.38 

2.41 

2-43 

19 

2.44 

2-47 

2.50 

2.52 

2-55 

2.46 

2.49 

2.51 

2-54 

2.56 

20 

2.57 

2.60 

2.62 

2.65 

2.67 

2-59 

2.61 

2.64 

2.67 

2.69 

21 

2.70 

2.73 

2-75 

2.78 

2.80 

2.72 

2.74 

2.77 

2.79 

2.82 

22 

2.83 

2.85 

2.88 

2.91 

2-93 

2.85 

2.87 

2.90 

2.92 

2-95 

23 

2.96 

2.98 

3-01 

3-03 

3-o6 

2.98 

3-oo 

3-03 

3-05 

3-o8 

24 

3.o8 

3-n 

3-14 

3.16 

3-19 

3.10 

3-13 

3.16 

3.18 

3-21 

25 

3.21 

3-24 

3-26 

3-29 

3-3i 

3-23 

3-26 

3-28 

3-31 

3-34 

26 

3-34 

3-37 

3-39 

3-42 

3-44 

3.36 

3-39 

3-4i 

3-44 

3-46 

27 

3-47 

3-49 

3-52 

3-54 

3-57 

3-49 

3-52 

3-54 

3-57 

3-59 

28 

3-6o 

3.62 

3.65 

3-67 

3-70 

3.62 

3-64 

3-67 

3-70 

3-72 

29 

3-72 

3-75 

3-77 

3-8o 

3-83 

3-75 

3-77 

3-8o 

3-82 

3.85 

30 

3-85 

3-88 

3-90 

3-93 

3-95 

3-88 

3-90 

3-93 

3-95 

3-98 

31 

3-98 

4.00 

4-03 

4.06 

4.08 

4.00 

4-03 

4.06 

4.08 

4.11 

32 

4.11 

4-13 

4.16 

4.18 

4.21 

4-13 

4.16 

4.18 

4.21 

4-24 

33 

4-23 

4.26 

4-29 

4.3i 

4-34 

4.26 

4.29 

4-31 

4-34 

4.36 

34 

4-36 

4-39 

4.41 

4-44 

4.46 

4-39 

4.42 

4-44 

4-47 

4-49 

35 

4-49 

4-51 

4-54 

4-57 

4-59 

4-52 

4-54 

4-57 

4-59 

4.62 

SMITHSONIAN  TABLES. 


TABLE   12. 

REDUCTION    OF   THE    BAROMETER    TO    STANDARD    GRAVITY. 

ENGLISH    MEASURES. 
Reduction  to  Latitude  45°. 

From  latitude  o°  to  45°,  the  correction  is  to  be  subtracted. 
From  latitude  90°  to  45°,  the  correction  is  to  be  added. 


Latitude. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

19 

20 

21 

22 

23 

24 

25 

26 

27 

28 

29 

30 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

0° 

90° 

0.051 

0-053 

0.056 

0-059 

O.o6  1 

0.064 

0.067 

0.069 

0.072 

0.074 

0.077 

0.080 

5 

85 

0.050 

0.052 

0-055 

0.058 

O.o6o 

0.063 

0.066 

0.068 

6.071 

0.073 

0.076 

0.079 

6 

84 

.049 

.052 

•055 

•057 

.060 

.062 

.065 

.068 

.070 

•073 

.076 

.0/8 

7 

83 

.049 

.052 

•054 

•057 

•059 

.062 

.065 

.067 

.070 

.072 

•075 

.077 

8 

82 

.049 

.051 

•054 

.056 

•059 

.061 

.064 

.067 

.069 

.072 

.074 

.077 

9 

81 

.048 

.051 

•053 

.056 

.058 

.061 

.063 

.066 

.068 

.071 

•073 

.076 

10 

80 

0.048 

0.050 

0.053 

0.055 

0.058 

O.o6o 

0.063 

0.065 

0.068 

0.070 

0.073 

0.075 

ii 

79 

.047 

.049 

.052 

•054 

•057 

•059 

.062 

.064 

.067 

.069 

.072 

.074 

12 

78 

.046 

.049 

.051 

•054 

.056 

.058 

.061 

.063 

.066 

.068 

.071 

•073 

13- 

77 

•045 

.048 

.050 

•053 

•055 

•057 

.060 

.062 

.065 

.067 

.069 

.072 

H 

76 

•045 

.047 

.049 

.052 

-054 

.056 

-059 

.061 

.063 

.066 

.068 

.071 

15 

75 

0.044 

0.046 

0.048 

0.051 

0-053 

0.055 

0.058 

O.o6o 

0.062 

0.065 

0.067 

0.069 

16 

74 

•043 

•045 

.047 

•050 

.Of,  2 

•054 

.056 

•°59 

.061 

•063 

•065 

.068 

17 

73 

.042 

.044 

.046 

•049 

.051 

•053 

•055 

•057 

.060 

.062 

.064 

.066 

18 

72 

.041 

•043 

•045 

.047 

.O~,O 

.052 

.°54 

.056 

.058 

.060 

.062 

.065 

19 

7i 

.040 

.042 

•044 

.046 

.048 

•050 

.052 

•055 

•057 

•059 

.061 

•063 

20 

70 

0.039 

0.041 

0.043 

0.045 

0.047 

0.049 

0.051 

0-053 

0.055 

0.057 

0.059 

0.06  1 

21 

69 

.038 

.040 

.042 

.044 

•045 

.047 

.049 

.051 

•053 

•055 

•057 

•059 

22 

68 

.036 

.038 

.040 

.042 

.044 

.046 

.048 

.050 

.052 

•054 

.056 

•057 

23 

6? 

•035 

•037 

•039 

.041 

•043 

.044 

.046 

.048 

.050 

.052 

•054 

•055 

24 

66 

..034 

.036 

•037 

•039 

.041 

•043 

•045 

.046 

.048 

.050 

.052 

•053 

25 

65 

0.033 

0.034 

0.036 

0.038 

0.039 

0.041 

0.043 

0.044 

0.046 

0.048 

0.050 

0.051 

26 

64 

.031 

•033 

•034 

.036 

.038 

•039 

.041 

•043 

•044 

.046 

.048 

•049 

27 

63 

.030 

.031 

•033 

•034 

.036 

•038 

•039 

.041 

.042 

.044 

•045 

.047 

28 

62 

.028 

.030 

.031 

•033 

•034 

.036 

•037 

•039 

.040 

.042 

.043 

•045 

29 

61 

.027 

.028 

•030 

.031 

.032 

•034 

•035 

•037 

.038 

•039 

.041 

.042 

30 

60 

0.025 

0.027 

0.028 

0.029 

0.031 

0.032 

0.033 

0.035 

0.036 

0.037 

0.039 

0.040 

3i 

59 

.024 

.025 

.026 

.027 

.029 

.030 

•031 

.032 

•034 

•035 

.036 

•037 

32 

58 

.022 

.023 

.025 

.026 

.027 

.028 

.029 

.030 

.032 

•033 

•034 

•035 

33 

57 

.O2I 

.022 

.023 

.024 

.025 

.026 

.027 

.028 

.029 

.030 

.031 

.032 

34 

56 

.019 

.O2O 

.O2I 

.022 

.023 

.024 

•025 

.026 

.027 

.028 

.029 

.030 

35 

55 

0.017 

O.OlS 

O.Oig 

0.020 

0.021 

0.022 

0.023 

0.024 

0.025 

0.025 

O.O26 

0.027 

36 

54 

.016 

.Ol6 

.017 

.018 

.019 

.020 

.021 

.021 

.022 

.023 

.024 

.025 

37 

53 

.014 

.015 

.015 

.016 

.017 

.018 

.018 

.019 

.020 

.O2I 

.021 

.022 

38 

52 

.012 

.013 

.014 

.014 

.015 

•015 

.016 

.017 

.017 

.018 

.019 

.019 

39 

5i 

.Oil 

.Oil 

.OI2 

.OI2 

•013 

.013 

.014 

.014 

•015 

.015 

.016 

.017 

40 

50 

0.009 

O.OO9 

O.OIO 

O.OIO 

O.OII 

O.OII 

0.012 

0.012 

O.OI2 

0.013 

0.013 

0.014 

4i 

49 

.007 

.007 

.008 

.008 

.009 

.009 

.009 

.OIO 

.OIO 

.010 

.Oil 

.Oil 

42 

48 

.005 

.006 

.006 

.006 

.006 

.007 

.007 

.007 

.008 

.008 

.008 

.008 

43 

47 

.004 

.004 

.004 

.OO4 

.004 

.004 

•005 

.005 

.005 

.005 

.005 

.006 

44 

46 

.002 

.002 

.002 

.OO2 

.002 

.002 

.002 

.002 

.003 

.003 

.003 

.003 

45 

45 

o.ooo 

O.OOO 

0.000 

O.OOO 

0.000 

0.000 

O.OOO 

0.000 

O.OOO 

O.OOO 

O.OOO 

0.000 

SMITHSONIAN  TABLES. 


TABLE  13. 
REDUCTION    OF   THE    BAROMETER    TO    STANDARD    GRAVITY. 

METRIC    MEASURES. 
Reduction  to  Latitude  45°. 

From  latitude  o°  to  45°,  the  correction  is  to  be  subtracted. 
From  latitude  90°  to  45°,  the  correction  is  to  be  added. 


Latitude. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

520 

540 

560 

580 

600 

620 

640 

660 

680 

700 

720 

740 

760 

780 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0° 

90° 

1.38 

1.44 

1.49 

1-54 

1.  60 

1.65 

1.70 

I.76 

1.81 

1.86 

1.92 

1.97 

2.02 

2.08 

5 

85 

1.36 

1.42 

1.47 

•52 

1-57 

1-63 

1.68 

1-73 

1.78 

1.84 

.89 

1.94 

•99 

2.04 

6 

84 

1.41 

1.46 

•51 

1.56 

1.61 

1.67 

1.72 

1.77 

.82 

•87 

•93 

•98 

2.03 

7 

83 

1.34 

i-45 

•50 

•55 

1.60 

1.65 

1.70 

1.76 

.81 

.86 

.96 

2.OI 

8 

82 

i-33 

i!38 

1-43 

.48 

•54 

i.59 

1.64 

1.69 

1-74 

•79 

.84 

•89 

•94 

2.OO 

9 

Si 

1.32 

i-37 

1.42 

•47 

•52 

i-57 

1.62 

1.67 

1.72 

•77 

.82 

.87 

•92 

1.97 

10 

80 

1.30 

T-35 

1.40 

•45 

•50 

1-55 

i.  60 

1.65 

1.70 

•75 

.80 

•85 

.90 

I>95 

ii 

79 

.28 

1.38 

.43 

.48 

i-53 

1.58 

1.63 

1.68 

•73 

•78 

•83 

.88 

i-93 

12 

78 

.26 

1.31 

1.36 

.41 

.46 

1-51 

1.56 

i.  60 

1.65 

.70 

•75 

.80 

•85 

1.90 

13 

77 

.24 

1.29 

1-34 

•39 

•44 

1.48 

i-53 

1.58 

1.63 

.67 

.72 

•77 

.82 

1.87 

14 

76 

.22 

1.27 

1.32 

.36 

.41 

1.46 

1.50 

i-55 

1.60 

•65 

.69 

•74 

•79 

1.83 

15 

75 

.20 

1.24 

1.29 

•34 

•38 

1-43 

1.48 

1-52 

i.57 

.61 

.66 

7i 

•75 

1.80 

16 

74 

•17 

1.22 

1.26 

•35 

.40 

1.44 

1.49 

i.54 

•58 

•63 

.67 

.72 

1.76 

17 

73 

•15 

I.I9 

1.24 

^28 

•32 

•37 

1.41 

1.50 

•54 

•59 

•63 

.68 

1.72 

18 

72 

.12 

1.16 

1.  21 

•25 

•29 

•34 

1.38 

1.42 

1.46 

.51 

•55 

•59 

.64 

1.68 

19 

7i 

.09 

I-I3 

I.I7 

.22 

.26 

•30 

i-34 

1.38 

1-43 

•47 

•51 

•55 

•59 

1.64 

20 

70 

.06 

1.  10 

I.I4 

.18 

.22 

.26 

1.31 

i-35 

•39 

•43 

•47 

1.51 

•55 

i.59 

21 

69 

•03 

1.07 

I.  II 

•15 

.19 

•23 

1.27 

•35 

•38 

.42 

1.46 

•50 

i-54 

22 

68 

.00 

1.03 

1.07 

.11 

•15 

•19 

1.23 

i!a6 

•30 

•34 

•38 

.42 

•46 

1.49 

23 

67 

0.96 

I.OO 

I.O4 

.07 

.11 

•15 

1.18 

1.22 

.26 

.29 

•33 

•37 

.41 

1.44 

24 

66 

•93 

0.96 

I.OO 

•03 

.07 

.10 

1.14 

1.18 

.21 

•25 

.28 

•32 

•35 

i-39 

25 

65 

0.89 

0.92 

0.96 

0.99 

1.03 

1.06 

1.  10 

I.I3 

.16 

.20 

.23 

•27 

1.30 

i-33 

26 

64 

.85 

.88 

.92 

•95 

0.98 

1.02 

1.05 

1.08 

.11 

•15 

.18 

.21 

1-25 

1.28 

27 

63 

.81 

.84 

.88 

•91 

•94 

0.97 

I.OO 

1.03 

.06 

.IO 

•13 

.16 

1.19 

1.22 

28 

62 

•  77 

.80 

•83 

.86 

•89 

.92 

0.95 

0.98 

I.OI 

.04 

.07 

.10 

1-13 

1.16 

29 

61 

•73 

.76 

•79 

.82 

.85 

.87 

.90 

•93 

0.96 

0.99 

.02 

.04 

1.07 

1.  10 

30 

60 

0.69 

0.72 

o.75 

0.77 

0.80 

0.83 

0.85 

0.88 

0.91 

0.94 

0.96 

0.98 

I.OI 

1.04 

31 

59 

•65 

.67 

.70 

.72 

•75 

•77 

.80 

.82 

.85 

.87 

.90 

.92 

o.95 

0.97 

32 

58 

.61 

•63 

•65 

.68 

.70 

•72 

•75 

•  77 

•79 

.82 

.84 

.86 

.89 

.91 

33 

57 

•56 

•58 

.61 

•63 

•65 

.67 

.69 

.71 

•74 

.76 

.78 

.80 

.82 

.84 

34 

56 

•52 

•54 

•  56 

•58 

.60 

.62 

.64 

.66 

.68 

.70 

.72 

•74 

.76 

.78 

35 

55 

0.47 

0.49 

0.51 

o-53 

o.55 

0.56 

0.58 

0.60 

0.62 

0.64 

0.66 

0.67 

0.69 

0.71 

36 

54 

•43 

•44 

.46 

.48 

.49 

.51 

•53 

•54 

•56 

•58 

•59 

.61 

•63 

.64 

37 

53 

•38 

.40 

.41 

•43 

•44 

•45 

•47 

.48 

•50 

•51 

•53 

•54 

.56 

•57 

38 

52 

•33 

•35 

•36 

•37 

•39 

.40 

.41 

•43 

•44 

•45 

.46 

.48 

•49 

•50 

39 

•29 

•30 

•32 

•33 

•34 

•35 

•37 

•38 

•39 

.40 

.41 

.42 

•43 

40 

50 

0.24 

0.25 

0.26 

0.27 

0.28 

0.29 

0.30 

0.31 

0.31 

0.32 

0.33 

o-34 

0-35 

0.36 

41 

49 

•19 

.20 

.21 

.21 

.22 

•23 

•24 

.24 

•25 

.26 

.27 

•  27 

.28 

.29 

42 

48 

.14 

•  15 

.16 

.16 

•17 

•  17 

.18 

.18 

•19 

•19 

.20 

.21 

.  21 

.22 

43 

47 

.10 

.10 

.IO 

.11 

.11 

.12 

.12 

.12 

.13 

•13 

•13 

.14 

.14 

.14 

44 

46 

•05 

•05 

•05 

•05 

.06 

.06 

.06 

,06 

.06 

.07 

.07 

.07 

.07 

.07 

45 

45 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

0.00 

o.oo 

0.00 

0.00 

0.00 

0.00 

0.00 

SMITHSONIAN  TABLES. 


59 


TABLE  14. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Values   of   2000  X  m. 


56573+  i23.i0-f-.oo3Z 


Mean  Tem- 
perature 
of  air 
column. 
0Fahr. 

AI/TITUDE  OF  STATION  IN   FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

100 

200 

300 

400 

500 

600 

700 

800 

900 

1000 

-20° 

3-7 

7.4 

ii.  i 

14.8 

18.5 

22.2 

25-9 

29.6 

33-3 

37-0 

3.7 

-16 

3-7 

7-3 

II.  0 

14.6 

18.3 

22.0 

25-6 

29-3 

33-0 

36.6 

3-7 

—  12 

3-6 

7-3 

10.9 

14.5 

18.1 

21.8 

254 

29.0 

32.7 

36.3 

3-6 

-   8 

3-6 

7.2 

10.8 

14.4 

18.0 

21.6 

25.2 

28.8 

32.4 

36.0 

3-6 

-   6 

3-6 

7.2 

10.7 

14-3 

17.9 

21-5 

25.1 

28.6 

32.2 

35-8 

3.6 

-   4 

3-6 

7-1 

10.7 

14-3 

17.8 

21.4 

25.0 

28.5 

32.1 

35-6 

3-6 

—     2 

3-5 

7-1 

10.7 

14.2 

17.7 

21.3 

24.8 

28.4 

3L9 

35-4 

3-5 

0 

3-5 

7-i 

10.6 

14.1 

17.7 

21.2 

24-7 

28.3 

31-8 

35-3 

3-5 

+    2 

3-5 

7.0 

10.6 

14.1 

17.6 

21.  1 

24.6 

28.1 

3L7 

35-2 

3-5 

4 

3-5 

7.0 

10.5 

14.0 

17.5 

21.0 

24-5 

28.0 

31.5 

35.o 

3-5 

6 

3-5 

7.0 

10.5 

13-9 

17.4 

2O.9 

24.4 

27.9 

3L4 

34-9 

3-5 

8 

3-5 

6.9 

10.4 

13.9 

17.4 

20.8 

24-3 

27.8 

31.2 

34-7 

3-5 

10 

3-5 

6.9 

10.4 

13.8 

17-3 

2O.7 

24.2 

27-7 

31-1 

34-6 

3.5 

12 

3-4 

6-9 

10.3 

13-8 

17.2 

20.  6 

24.1 

27.5 

31.0 

34-4 

3-4 

14 

3-4 

6.9 

10.3 

13.7 

17.1 

20.  6 

24.0 

27.4 

30.8 

34-3 

3-4 

16 

3-4 

6.8 

10.2 

13-6 

17.1 

20.5 

23.9 

27-3 

30.7 

34-1 

3-4 

18 

3-4 

6.8 

10.2 

13-6 

17.0 

20.4 

23.8 

27.2 

30.6 

34-o 

3-4 

20 

3-4 

6.8 

10.  1 

13.5 

16.9 

20.3 

23.7 

27.1 

30.4 

33-8 

3-4 

22 

3-4 

6-7 

10.  1 

13-5 

16.8 

20.2 

23-6 

26.9 

30.3 

33-7 

3-4 

24 

3-4 

6.7 

10.  1 

13-4 

16.8 

20.1 

23-5 

26.8 

30.2 

33-5 

3-4 

26 

3-3 

6-7 

IO.O 

13-4 

16.7 

20.0 

23-4 

26.7 

30.1 

33-4 

3-3 

28 

3.3 

6.7 

IO.O 

13-3 

16.6 

20.0 

23-3 

26.6 

29.9 

33-3 

3-3 

30 

3-3 

6.6 

9-9 

13.2 

16.6 

19.9 

23-2 

26.5 

29.8 

33-i 

3-3 

32 

3-3 

6.6 

9-9 

13.2 

16.5 

I9.8 

23.1 

26.4 

29.7 

33-o 

3.3 

34 

3-3 

6.6 

99 

13-1 

16.4 

19.7 

23.0 

26.3 

29.6 

32-8 

3.3 

36 

3.3 

6-5 

9.8 

13-1 

16.4 

19.6 

22.9 

26.2 

29.4 

32.7 

3-3 

38 

3-3 

6.5 

9-8 

13.0 

16.3 

19-5 

22.8 

26.0 

29-3 

32-6 

3-3 

40 

3-2 

6-5 

9.7 

13.0 

16.2 

19-5 

22.7 

25-9 

29.2 

32-4 

3-2 

42 

3.2 

6.5 

9-7 

12.9 

16.1 

19.4 

22.6 

-    25.8 

29.1 

32.3 

3-2 

44 

3-2 

6-4 

9-6 

12.9 

16.1 

19-3 

22.5 

25.7 

28.9 

32.1 

3-2 

46 

3-2 

6.4 

9-6 

12.8 

16.0 

I9.2 

22.4 

25-6 

28.8 

32.0 

3-2 

48 

3.2 

6-4 

9.6 

12.7 

15-9 

I9.I 

22.3 

25-5 

28.7 

3i-9 

3-2 

50 

3-2 

6-3 

9-5 

12.7 

15.9 

ig.O 

22.2 

25-4 

28.6 

3i-7 

3-2 

52 

3-2 

6.3 

9-5 

12.6 

15-8 

I9.O 

22.1 

25-3 

28.4 

31.6 

3-2 

54 

3- 

6-3 

9-4 

12.6 

15-7 

18.9 

22.0 

25.2 

28.3 

3i-5 

3- 

56 

3- 

6-3 

9-4 

12.5 

15.7 

18.8 

21.9 

25.1 

28.2 

3i-3 

3- 

58 

3- 

6.2 

9-4 

12.5 

15-6 

18.7 

21.8 

25.0 

28.1 

31.2 

3- 

60 

3- 

6.2 

9-3 

12.4 

15.5 

18.6 

21.7 

24.8 

28.0 

31-1 

3- 

62 

3- 

6.2 

9-3 

12.4 

15-5 

18.6 

21.6 

24.7 

27.8 

30.9 

3- 

64 

3- 

6.2 

9-2 

12.3 

15.4 

18.5 

21.6 

24.6 

27.7 

30.8 

3- 

66 

3-i 

6.1 

9.2 

12.3 

15.3 

18.4 

21.5 

24-5 

27.6 

30.7 

3- 

68 

3.1 

6.1 

9.2 

12.2 

15.3 

18.3 

21.4 

24-4 

27.5 

30.5 

3- 

70 

3-0 

6.1 

9.1 

12.2 

15.2 

lS.2 

21.3 

24-3 

27.4 

30.4 

3-° 

72 

3-o 

6.1 

9-i 

12.  1 

15-1 

18.2 

21.2 

24.2 

27.3 

30.3 

3-° 

76 

3-° 

6.0 

9.0 

12.0 

15.0 

18.0 

21.  0 

24.0 

27.0 

30.0 

3.o 

80 

3-° 

6.0 

8.9 

II.9 

14.9 

17.9 

2O.9 

23-8 

26.8 

29.8 

3-o 

84 

3-° 

5-9 

8.9 

11.8 

14.8 

17.7 

20.7 

23-6 

26.6 

29.6 

3-o 

88 

2.9 

5-9 

8.8 

n.  7 

14.7 

17.6 

20.5 

23-5 

26.4 

29.3 

2.9 

92 

2.9 

5.8 

8.7 

ii.  6 

14.5 

17.4 

20.4 

23-3 

26.2 

29.1 

2-9 

96 

2-9 

5-8 

8-7 

H.5 

14.4 

17.3 

20.2 

23.1 

26.0 

28.9 

2-9 

SMITHSONIAN  TABLES. 


60 


TABLE  14. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Z(i—  0) 


Values  of  2000  X  m. 


m  = 


Mean  Tem- 
perature 
of  air 
column. 
0Fahr. 

ALTITUDE  OF  STATION   IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

1100 

1200 

1300 

1400 

1500 

1600 

1700 

1800 

1900 

2000 

-20° 

40.7 

44.3 

48.0 

5L7 

55-4 

59-  1 

62.8 

66.5 

70.2 

73-9 

3-7 

-  16 

40.3 

43-9 

47-6 

51-3 

54-9 

58.6 

62.2 

65-9 

69.6 

73-2 

3-7 

—  12 

39-9 

43-5 

47.2 

50.8 

54-4 

58.1 

61.7 

65.3 

68.9 

72.6 

3.6 

-   8 

39-6 

43-2 

46.7 

50.3 

53-9 

57-5 

61.1 

64.7 

68.3 

71.9 

3-6 

-    6 

39-4 

43-0 

46.5 

50.1 

53-7 

57-3 

60.9 

64.4 

68.0 

71.6 

3-6 

—    4 

39-2 

42.8 

46.3 

49-9 

53-5 

57.o 

60.6 

64.2 

67.7 

7i.3 

3.6 

—     2 

39-o 

42.6 

46.1 

49-7 

53-2 

56.8 

60.3 

63.9 

67-4 

71.0 

3-6 

0 

38.9 

42.4 

45-9 

49.5 

53-0 

56.5 

60.  i 

63.6 

67.1 

70.6 

3-5 

+     2 

38.7 

42.2 

45-7 

49-2 

52.8 

56.3 

59-8 

63-3 

66.8 

70.3 

3-5 

4 

38.5 

42.0 

45-5 

49.0 

52.5 

56.0 

59-5 

63.0 

66.5 

70.0 

3-5 

6 

38.4 

41.8 

45-3 

48.8 

52.3 

55.8 

59-3 

62.8 

66.2 

69.7 

3-5 

8 

38.2 

•41.7 

45-1 

48.6 

52.1 

55-5 

59-° 

62.5 

66.0 

69.4 

3-5 

10 

38.0 

41-5 

44-9 

48.4 

51-8 

55-3 

58.8 

62.2 

65.7 

69.! 

3-5 

12 

37-9 

41-3 

44-7 

48.2 

51-6 

55-1 

58.5 

61.9 

65.4 

68.8 

3-4 

H 

37-7 

41.1 

44-5 

48.0 

51.4 

54-8 

58.2 

61.7 

65-1 

68.5 

3-4 

16 

37-5 

40.9 

44.4 

47.8 

51-2 

54.6 

58.0 

61.4 

64.8 

68.2 

3-4 

18 

37-4 

40.8 

44-2 

47-6 

51-0 

54-4 

57-8 

61.1 

64.5 

67-9 

3-4 

20 

37-2 

40.6 

44.0 

47-4 

50-7 

54-1 

57.5 

60.9 

64-3 

67.7 

3-4 

22 

37-1 

40.4 

43-8 

47.2 

50.5 

53-9 

57.3 

60.6 

64.0 

67.4 

3-4 

24 

36.9 

40.3 

43-6 

47.o 

50.3 

53-7 

57-0 

60.4 

63.7 

67.1 

3-4 

26 

36.7 

40.  -i 

43-4 

46.8 

50.1 

53.4 

56.8 

60.  i 

63.5 

66.8 

3-3 

28 

36.6 

39-9 

43-2 

46.6 

49-9 

53-2 

56.5 

59-9 

63.2 

66.5 

3.3 

30 

36.4 

39-7 

43-1 

46.4 

49-7 

53-o 

56.3 

59-6 

62.9 

66.2 

3-3 

32 

36.3 

39-6 

42.9 

46.2 

49.5 

52.8 

56.i 

59-4 

62.7 

66.0 

3-3 

34 

36.1 

39-4 

42.7 

46.0 

49-3 

52.5 

55-8 

59.1 

62.4 

65.7 

3-3 

36 

36.0 

39-2 

42.5 

45-8 

49.0 

52.3 

55-6 

58.9 

62.1 

65.4 

3-3 

38 

35-8 

39-i 

42.3 

45-6 

48.8 

52.1 

55.3 

58.6 

61.9 

65-1 

3-3 

40 

35-7 

38.9 

42.1 

45-4 

48.6 

51-9 

55.i 

58.4 

61.6 

64.8 

3-2 

42 

35-5 

38.7 

42.0 

45-2 

48.4 

51-6 

54-9 

58.1 

61.3 

64.6 

3-2 

44 

35-4 

38.6 

41.8 

45.o 

48.2 

51-4 

54-6 

57-9 

61.1 

64-3 

3-2 

46 

35-2 

38.4 

41.6 

44-8 

48.0 

51.2 

54-4 

57-6 

60.8 

64.0 

3.2 

48 

35-i 

38-2 

41.4 

44-6 

47-8 

51.0 

54-2 

57-4 

60.5 

63.7 

3-2 

50 

34-9 

38.1 

41.2 

44-4 

47-6 

50.8 

53-9 

57-1 

60.3 

63-4 

3-2 

52 

34-8 

37-9 

41.1 

44.2 

47-4 

50.5 

53-7 

56.9 

60.0 

63.2 

3-2 

54 

34-6 

37-7 

40.9 

44.0 

47-2 

50.3 

53-5 

56.6 

59-8 

62.9 

3.1 

56 

34-5 

37.6 

40.7 

43-9 

47.0 

50.1 

53-2 

56.4 

59-5 

62.6 

3- 

58 

34-3 

37-4 

40-5 

43-7 

46.8 

49-9 

53-0 

56.1 

59-3 

62.4 

3. 

60 

34-2 

37.3 

40.4 

43-5 

46.6 

49-7 

52.8 

55-9 

59-o 

62.1 

3- 

62 

34-0 

37-1 

40.2 

43.3 

46.4 

49-5 

52.6 

55-7 

58.8 

61.9 

3. 

64 

33-9 

37-0 

40.0 

43-1 

46.2 

49.3 

52.4 

55-4 

58.5 

61.6 

3- 

66 

33-7 

36.8 

39-9 

42.9 

46.0 

49.1 

52-1 

55-2 

58.3 

61.3 

3- 

68 

33-6 

36.6 

39-7 

42.8 

45-8 

48.9 

51-9 

55-0 

58.0 

61.1 

3- 

70 

33-5 

36.5 

39-5 

42.6 

45-6 

48.7 

5L7 

54.7 

57.8 

60.8 

3-0 

72 

33-3 

36.3 

39-4 

42.4 

45-4 

48.5 

5L5 

54.5 

57-5 

60.6 

3-0 

76 

33-o 

36.0 

39-i 

42.1 

45-1 

48.1 

5I-I 

54-1 

57-1 

60.  i 

3-° 

80 

32.8 

35-8 

38.7 

41.7 

44.7 

47-7 

50.6 

53-6 

56.6 

59-6 

3-0 

84 

32.5 

35-5 

38.4 

41.4 

44-3 

47-3 

50.2 

53.2 

56.2 

59-i 

3-o 

88 

32.2 

35-2 

38.1 

41.0 

44-0 

46.9 

49-8 

52.8 

55-7 

58.6 

2-9 

92 

32.0 

34-9 

37-8 

40.7 

43-6 

46.5 

49-4 

52.3 

55-3 

58.2 

2.9 

96 

3i.7 

34-6 

37-5 

40.4 

43-3 

46.2 

49.0 

5L9 

54-8 

57.7 

2.9 

SMITHSONIAN  TABLES. 


61 


TABLE  14. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Z  (i—  0) 


Values  of  20OO  X  m. 


56573+1 2 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

ALTITUDE  OF  STATION  IN   FEET   (z). 

Differ- 
ence 
for 
100 
Feet. 

2100 

2200 

2300 

2400 

2500 

2600 

2700 

2800 

2900 

3000 

-20° 

77-6 

81.3 

85.0 

88.7 

92.4 

96.1 

99-8 

103.5 

107.2 

110.9 

3-7 

-16 

76.9 

80.6 

84.2 

87-9 

9J-5 

95-2 

98.9 

102.5 

106.2 

109.8 

3-7 

—  12 

76.2 

79-8 

83.5 

87.1 

90.7 

94-3 

98.0 

101.6 

105.2 

108.8 

3-6 

-   8 

75-5 

79.1 

82.7 

86.3 

89.9 

93-5 

97-1 

100.7 

J04.3 

107.9 

3-6 

-   6 

75-2 

78.8 

82.3 

85.9 

89.5 

93-i 

96.6 

IOO.2 

103.8 

107.4 

3-6 

-   4 

74-8 

78.4 

82.0 

85.5 

89.1 

92.7 

96.2 

99.8 

103.3 

106.9 

3-6 

—     2 

74-5 

78.1 

81.6 

85.2 

88.7 

92.2 

95-8 

99.3 

102.9 

106.4 

3-5 

0 

74-2 

77-7 

81.2 

84.8 

88.3 

91.8 

95-4 

98.9 

102.5 

1  06.0 

3-5 

+     2 

73.9 

77-4 

80.9 

84-4 

87.9 

91.4 

95.o 

98.5 

IO2.O 

105.5 

3-5 

4 

73-5 

77.0 

80.5 

84.0 

87.5 

91.0 

94-5 

98.0 

IOI.5 

105.0 

3-5 

6 

73-2 

76.7 

80.2 

83.7 

87.2 

90.6 

94.1 

97-6 

IOI.I 

104.6 

3-5 

8 

72.9 

76.4 

79-8 

83.3 

86.8 

90.2 

93-7 

97-2 

100.7 

104.1 

3-5 

10 

72.6 

76.0 

79-5 

82.9 

86.4 

89.9 

93-3 

96.8 

IOO.2 

103.7 

3-5 

12 

72.3 

75-7 

79.1 

82.6 

86.0 

89.5 

92.9 

96.3 

99-8 

103.2 

3-4 

14 

72.0 

75-4 

78.8 

82.2 

85.7 

89.1 

92'5 

95-9 

99-4 

102.8 

3-4 

16 

71.6 

75-1 

78.5 

81.9 

85.3 

88.7 

92.1 

95.5 

98.9 

102.3 

3-4 

18 

7L3 

74-7 

78.1 

81.5 

84-9 

88.3. 

91.7 

95-1 

98.5 

101.9 

3-4 

20 

71.0 

74-4 

77-8 

81.2 

84.6 

87.9 

9L3 

94-7 

98.1 

101.5 

3-4 

22 

70.7 

74.1 

77-5 

80.8 

84.2 

87.6 

90.9 

94-3 

97-7 

IOI.O 

3-4 

24 

70.4 

73-8 

77.1 

80.5 

83-8 

87.2 

90.6 

93-9 

97-3 

100.6 

3-4 

26 

70.1 

73-5 

76.8 

80.2 

83.5 

86.8 

90.2 

93-5 

96.9 

IOO.2 

3-3 

28 

69.8 

73-2 

76.5 

79.8 

83-1 

86.5 

89.8 

93-1 

96.4 

99.8 

3-3 

30 

69-5 

72-9 

76.2 

79-5 

82.8 

86.1 

89.4 

92.7 

96.0 

99.3 

3-3 

32 

69.2 

72.5 

75-8 

79.1 

82.4 

85.7 

92.3 

95-6 

98.9 

3-3 

34 

69.0 

72.2 

75.5 

78.8 

82.1 

85.4 

88.7 

91-9 

95.2 

98.5 

3-3 

36 

68.7 

71.9 

75-2 

78.5 

81.7 

85.0 

88.3 

9J-5 

94-8 

98.1 

3-3 

38 

68.4 

71.6 

74-9 

78.1 

81.4 

84.6 

87.9 

91.2 

94-4 

97-7 

3-3 

40 

68.1 

7i.3 

74.6 

77.8 

81.0 

84-3 

87.5 

90.8 

94.0 

97.2 

3-2 

42 

67.8 

71.0 

74.2 

77-5 

80.7 

83-9 

87.1 

90.4 

93-6 

96.8 

3-2 

44 

67.5 

70.7 

73-9 

77.1 

80.3 

83.6 

86.8 

90.0 

93.2 

96.4 

3-2 

46 

67.2 

70.4 

73-6 

76.8 

80.0 

83.2 

86.4 

89.6 

92.8 

96.0 

3.2 

48 

66.9 

70.1 

73.3 

76.5 

79-7 

82.8 

86.0 

89.2 

92.4 

95-6 

3.2 

50 

66.6 

69.8 

73-0 

76.1 

79-3 

82.5 

85.7 

88.8 

92.0 

95-2 

3.2 

52 

66.3 

69-5 

72.7 

75-8 

79.0 

82.1 

85.3 

88.4 

91.6 

94-8 

3.2 

54 

66.1 

69.2 

72.3 

75-5 

78.6 

81.8 

84.9 

88.1 

91.2 

94.4 

3.! 

56 

65.8 

68.9 

72.0 

75-2 

78-3 

81.4 

84.6 

87.7 

90.8 

94-0 

3-i 

53 

65.5 

68.6 

71.7 

74-9 

78.0 

81.1 

84.2 

87.3 

90.4 

93-6 

3-i 

60 

65-2 

68.3 

7i-4 

74-5 

77-6 

80.7 

83.8 

87.0 

90.1 

93-2 

3-i 

62 

64.9 

68.0 

71.1 

74.2 

77-3 

80.4 

83.5 

86.6 

89  7 

92.8 

3.1 

64 

64.7 

67.8 

70.8 

73-9 

77-0 

80.  i 

83.1 

86.2 

89-3 

92.4 

3-1 

66 

64.4 

67-5 

70.5 

73-6 

76.7 

79-7 

82.8 

85.9 

88.9 

92.0 

3-1 

68    ' 

64.1 

67.2 

70.2 

73-3 

76.3 

79-4 

82.5 

85.5 

88.6 

91.6 

3-1 

70 

63-9 

66.9 

69.9 

73-0 

76.0 

79.1 

82.1 

85.1 

88.2 

91.2 

3-0 

72 

63.6 

66.6 

69.7 

72.7 

75.7 

78.7 

81.8 

84.8 

87.8 

90.9 

3-0 

76 

63-1 

66.1 

69.1 

72.1 

75-1 

78.1 

81.1 

84.1 

87.1 

90.1 

3.o 

80 

62.6 

65-5 

68.5 

71-5 

74-5 

77-5 

80.5 

83.4 

86.4 

89.4 

3-° 

84 

62.1 

65.0 

68.0 

70.9 

73.9 

76.8 

79-8 

82.7 

85.7 

88.6 

3-o 

88 

61.6 

64-5 

67.4 

70.4 

73.3 

76.2 

79.1 

82.1 

85.0 

87.9 

2-9 

92 

61.1 

64.0 

66.9 

69.8 

72.7 

75-6 

78.5 

81.4 

84-3 

87.2 

2.9 

96 

60.6 

63.5 

66.4 

69.2 

72.1 

75-0 

77-9 

80.8 

83.7 

86.5 

2.9 

SMITHSONIAN  TABLES. 


62 


TABLE  14. 

REDUCTION    OF   THE     BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Z  (i—  fi) 
Values   of    2OOO  X  m.  m 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

AI/TITUDE  OF  STATION  IN   FEET   (z). 

Differ- 
ence 
for 
100 
Feet. 

3100 

3200 

3300 

3400 

3500 

3600 

3700 

3800 

3900 

4000 

-20° 

II4-5 

118.2 

121.9 

125.6 

129.3 

i33.o 

136.7 

140.4 

144.1 

147.8 

3-7 

-16 

II3-5 

117.2 

120.8 

124.5 

128.1 

131.8 

135-5 

I39-I 

142.8 

146.4 

3-7 

—  12 

112.5 

116.1 

119.7 

123-3 

127.0 

130.6 

134.2 

137-9 

141-5 

I45.I 

3-6 

-  8 

111.5 

115.1 

118.7 

122.3 

125.9 

129.4 

i33.o 

136.6 

140.2 

143.8 

3-6 

-   6 

III.O 

II4-5 

118.1 

121.7 

125.3 

128.9 

132.4 

136.0 

139-6 

143-2 

3-6 

—   4 

110.5 

114.0 

117.6 

121.  2 

124.7 

128.3 

131-9 

135-4 

139.0 

142.5 

3-6 

—     2 

IIO.O 

II3-5 

117,1 

120.6 

124.2 

127.7 

131-3 

134.8 

138.4 

141.9 

3.5 

0 

109.5 

113.0 

116.6 

1  20.  1 

123.6 

127.2 

130.7 

134.2 

137-8 

141-3 

3-5 

+     2 

109.0 

112.5 

116.1 

II9.6 

123.1 

126.6 

130.1 

133-6 

I37-I 

140.7 

3.5 

4 

108.5 

112.  0 

H5.5 

II9.0 

122.5 

126.0 

129.5 

!33-o 

136.5 

140.0 

3-5 

6 

108.1 

in.  6 

115.0 

II8.5 

122.  0 

125-5 

129.0 

132-5 

135-9 

139-4 

3.5 

8 

107.6 

III.  I 

II4-5 

IlS.O 

I2I.5 

124.9 

128.4 

131-9 

135.4 

138.8 

3-5 

10 

107.1 

1  10.  6 

114.0 

H7.5 

121.  0 

124.4 

127.9 

!3i-3 

134.8 

138.2 

3-5 

12 

106.7 

1  10.  1 

113.6 

II7.0 

I2O.4 

123.9 

127.3 

130.7 

134-2 

137.6 

3-4 

14 

1  06.  2 

109.6 

113.1 

II6.5 

II9.9 

123.3 

126.8 

130.2 

133.6 

137.0 

3-4 

16 

105.8 

109.2 

112.  6 

116.0 

II9.4 

122.8 

126.2 

129.6 

133-0 

136.5 

3-4 

18 

105-3 

108.7 

112.  1 

115-5 

II8.9 

122.3 

125.7 

129.1 

132.5 

135.9 

3-4 

20 

104.9 

108.2 

in.  6 

115.0 

II8.4 

121.  8 

125.1 

128.5 

131.9 

135.3 

3-4 

22 

104.4 

107.8 

III.  I 

H4.5 

II7.9 

121.  2 

124.6 

128.0 

131-3 

134.7 

3-4 

24 

104.0 

107.3 

110.7 

114.0 

II7.4 

I2O.7 

124.1 

127.4 

130.8 

I34-I 

3-4 

26 

103-5 

106.9 

1  10.  2 

II3-5 

Il6.9 

120.2 

123.6 

126.9 

130.2 

133-6 

3-3 

28 

I03.I 

106.4 

109.7 

113.1 

Il6.4 

II9.7 

123.0 

126.4 

129.7 

133-0 

3-3 

30 

IO2.7 

106.0 

109.3 

112.  6 

II5-9 

II9.2 

122.5 

125.8 

129.1 

132.4 

3-3 

32 

IO2.2 

105.5 

108.8 

112.  1 

II5-4 

Il8.7 

122.0 

125-3 

128.6 

131-9 

3-3 

34 

IOI.8 

105.1 

108.3 

in.  6 

II4.9 

118.2 

I2I.5 

124.8 

128.0 

131-3 

3-3 

36 

IOI.3 

104.6 

107.9 

III.  2 

II4.4 

117.7 

121.  0 

124.2 

127.5 

130.8 

3-3 

38 

IOO-9 

104.1 

107.4 

IIO.7 

•"3-9 

117.2 

I2O.4 

123.7 

126.9 

130.2 

3-3 

40 

100.5 

103.7 

IO7.O 

IIO.  2 

II3-4 

116.7 

II9.9 

123.2 

126.4 

129.6 

3-2 

42 

100.0 

103.3 

106.5 

109.7 

113.0 

116.2 

II9.4 

122.6 

125.9 

129.1 

3.2 

44 

99.6 

102.8 

1  06.0 

109.3 

112.5 

115.7 

II8.9 

122.  1 

125.3 

128.5 

3-2 

46 

99.2 

102.4 

105.6 

108.8 

112.  0 

115.2 

II8.4 

121.  6 

124.8 

128.0 

3-2 

48 

98.8 

101.9 

I05.I 

108.3 

111.5 

114.7 

II7.9 

121.  1 

124.2 

127.4 

3-2 

50 

98.3 

101.5 

104.7 

107.9 

III.O 

114.2 

II7.4 

120.5 

123.7 

126.9 

3-2 

52 

97.9 

IOI.I 

IO4.2 

107.4 

110.5 

113.7 

Il6.9 

I2O.O 

123.2 

126.3 

3-2 

54 

97.5 

100.6 

IO3.8  i    106.9 

1  10.  1 

113.2 

Il6.4 

II9-5 

122.7 

125.8 

3-i 

56 

97.1 

IOO.2 

103.3  |    106.5 

109.6 

112.7 

II5-9 

II9.O 

122.  1 

125.2 

3-i 

58 

96.7 

99-8 

IO2.9       I  O6.O 

109.1 

112.3 

H5.4 

II8.5 

121.  6 

124.7 

3-1 

60 

96.3 

99-4 

102.5  j     105.6 

108.7 

in.  8 

II4.9 

118.0 

121.  1 

124.2 

3-i 

62 

95-9 

98.9 

102.0       I05.I 

108.2 

111.3 

II4.4 

II7-5 

120.6 

123.7 

3.1 

64 

95-5 

98.5 

101.6 

104.7 

107.8 

1  10.  8 

H3.9 

117.0 

I2O.I 

123.1 

3-1 

66 

95-1 

98.1 

IOI.2 

104.3 

107.3 

110.4 

H3.5 

116.5 

II9.6 

122.6 

3.1 

68 

94.7 

97-7 

100.8 

103.8 

106.9 

109.9 

II3.0 

116.0 

II9.I 

122.  1 

3-1 

70 

94-3 

97-3 

100.3 

103.4 

106.4 

109-5 

112.5 

II5-5 

II8.6 

121.  6 

3-o 

72 

93-9 

96.9 

99-9 

103.0 

106.0 

109.0 

112.  0 

115.1 

II8.I 

121.  1 

3-0 

76 

93-i 

96.1 

99.1 

102.  1 

105.1 

108.1 

III.  I 

114.1 

II7.I 

1  20.  1 

3-0 

80 

92-3 

95.3 

98.3 

IOI.3 

104.3 

107.2 

1  10.  2 

113.2 

116.2 

II9.2 

3-0 

84 

91.6 

94-5 

97-5 

100.5 

103.4 

106.4 

109.3 

112.3 

115.2 

II8.2 

3-0 

88 

90.9 

93-8 

96.7 

99-7 

IO2.6 

105.5 

108.4 

111.4 

"4-3 

II7.2 

2-9 

92 

90.1 

93-o 

96.0 

98.9 

101.8 

104.7 

107.6 

110.5 

H3.4 

II0.3 

2.9 

96 

89.4 

92.3 

95-2 

98.1 

IOI.O 

103.8 

I06.7 

109.6 

112.5 

H5.4 

2.9 

SMITHSONIAN  TABLES. 


TABLE  14. 

REDUCTION    OF   THE    BAROMETER   TO   SEA    LEVEL. 

ENGLISH    MEASURES. 

Z  (i—  B 


Values   of    2000  X  m. 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

ALTITUDE  OF  STATION   IN   FEET   (z). 

Differ- 
ence 
for 
100 
Feet. 

4100 

4200 

4300 

4400 

4500 

4600 

4700 

4800 

4900 

5000 

-20° 

I5I-5 

155-2 

158.9 

162.6 

166.3 

170.0 

173-7 

177.3 

181.0 

184.7 

3-7 

-  16 

150.1 

153-8 

157.4 

161.1 

164.8 

168.4 

172.1 

175-7 

179-4 

183.1 

3-7 

—  12 

148.8 

152.4 

156.0 

159-6 

163.3 

166.9 

170.5 

174.1 

177-8 

181.4 

3-6 

-   8 

147.4 

151.0 

154.6 

158.2 

161.8 

165.4 

169.0 

172.6 

176.2 

179.8 

3-6 

-    6 

146.8 

150.3 

J53-9 

157-5 

161.1 

164.7 

168.2 

171.8 

175.4 

179.0 

3.6 

-    4 

146.1 

149.7 

153.2 

156.8 

160.4 

163.9 

167-5 

171.0 

174.6 

178.2 

3-6 

—     2 

145.5 

149.0 

152.5 

156.1 

159-6 

163.2 

166.7 

170.3 

173-8 

177.4 

3-5 

0 

144.8 

148.3 

151-9 

155-4 

158.9 

162.5 

166.0 

169.5 

I73-I 

176.6 

3.5 

+     2 

144.2 

147.7 

151.2 

154.7 

158.2 

161.8 

165.3 

168.8 

172.3 

175-8 

3-5 

4 

143-5 

147.0 

155-5 

154.0 

157-5 

161.0 

164.5 

168.0 

171-5 

3-5 

6 

142.9 

146.4 

149.9 

153-4 

156.9 

160.3 

163.8 

167.3 

170.8 

174.3 

3-5 

8 

142.3 

145-8 

149.2 

152-7 

156.2 

159.6 

163.1 

166.6 

170.1 

173-5 

3-5 

10 

141.7 

I45-I 

148.6 

152.0 

155-5 

159.0 

162.4 

165.9 

169.3 

172.8 

3.5 

12 

141.1 

144-5 

147.9 

I5L4 

154-8 

158.3 

161.7 

165.1 

168.6 

172.0 

3-4 

14 

140.5 

143.9 

147-3 

150.7 

154.2 

157.6 

161.0 

164.4 

167.9 

171-3 

3-4 

16 

139-9 

143-3 

146.7 

150.1 

153-5 

156.9 

160.3 

163.7 

167.1 

170.6 

3-4 

18 

142.7 

146.1 

149-5 

152-9 

156.2 

159.6 

162.0 

166.4 

169.8 

3-4 

20 

138-7 

142.1 

145.4 

148.8 

152.2 

155-6 

159-0 

162.3 

165.7 

169.1 

3-4 

22 

138.1 

141-5 

144.8 

148.2 

151.6 

154-9 

158.3 

161.7 

165.0 

168.4 

3-4 

24 

137.5 

140.9 

144.2 

147.6 

150.9 

154.3 

157.6 

161.0 

164.3 

167.7 

3-4 

26 

136.9 

140.3 

143.6 

146.9 

150.3 

153.6 

160.3 

163.6 

167.0 

3-3 

28 

136.3 

139.7 

143.0 

146.3 

149.6 

153-0 

156.3 

159-6 

162.9 

166.3 

3-3 

30 

135.8 

I39-I 

142.4 

145.7 

149.0 

152-3 

155-6 

158.9 

162.2 

165.6 

3-3 

32 

135-2 

138.5 

141.8 

I45.I 

148.4 

I5L7 

158.3 

161.6 

164.8 

3-3 

34 

134.6 

137.9 

141.2 

144-5 

147.7 

151.0 

154-3 

157.6 

160.9 

164.1 

3-3 

36 

134.0 

137.3 

140.6 

143.8 

147.1 

150.4 

153-6 

156.9 

160.2 

163.4 

3-3 

38 

133-5 

136.7 

140.0 

143.2 

146.5 

149.7 

153-0 

156.2 

159.5 

162.7 

3-3 

40 

132.9 

136.1 

T39-4 

142.6 

145-8 

149.1 

152-3 

155.6 

158.8 

162.0 

3-2 

42 

132.3 

135.5 

138^8 

142.0 

145.2 

148.4 

151-7 

154.9 

158.1 

161.4 

3-2 

44 

131-7 

135-0 

138.2 

141.4 

144.6 

147.8 

151.0 

154.2 

157.4 

160.7 

3-2 

46 

131.2 

134-4 

137-6 

140.8 

144.0 

147.2 

150.4 

153-6 

156.8 

1  60.0 

3-2 

48 

130.6 

133.8 

137.0 

140.2 

143-4 

146.5 

149.7 

152.9 

156.1 

159.3 

3-2 

50 

130.1 

133.2 

136.4 

139.6 

142.7 

145-9 

149.1 

152.2 

155-4 

158.6 

3.2 

52 

129.5 

132.6 

135-8 

139.0 

142.1 

145.3 

148.4 

151.6 

154-8 

157.9 

3-2 

54 

129.0 

132.1 

135-2 

138.4 

I4I-5 

144-7 

147.8 

151.0 

I54-I 

I57.2 

3. 

56 

128.4 

134.7 

137-8 

140.9 

144.0 

147.2 

150.3 

153-4 

156.6 

3- 

58 

127.9 

131.0 

I34-I 

137.2 

140.3 

143-4 

146.6 

H9.7 

152.8 

155-9 

3. 

60 

127.3 

130.4 

133.5 

136.6 

139-7 

142.8 

145-9 

149.0 

152.1 

155-2 

3- 

62 

126.8 

129.9 

136.0 

I39-I 

142.2 

145.3 

148.4 

151-5 

154.6 

3- 

64 

126.2 

129.3 

132.4 

135-5 

138.6 

141.6 

144.7 

147.8 

150.9 

153-9 

3. 

66 

125-7 

128.8 

131.8 

134.9 

138.0 

141.0 

144.1 

147.2 

150.2 

153.3 

68 

125.2 

128.2 

131-3 

134.3 

137-4 

140.5 

143-5 

146.6 

149.6 

152.7 

3-1 

70 

124.7 

127.7 

130.7 

133.8 

136.8 

139-9 

142.9 

145.9 

149.0 

152.0 

3.o 

72 

124.2 

127.2 

130.2 

133.2 

136.3 

139.3 

142.3 

145.3 

148.4 

JSM 

3-0 

76 

123.1 

126.1 

129.1 

132.1 

I35-1 

138.1 

141.2 

144.2 

147.2 

150.2 

3-0 

80 

122.  1 

125.1 

128.1 

131.1 

134.0 

137.0 

140.0 

143.0 

146.0 

148.9 

3-0 

84 

121.  1 

124.0 

127.0 

130.0 

135-9 

138.9 

141.8 

144-8 

147.7 

3-o 

88 

1  20.  2 

123.1 

126.0 

129.0 

131-9 

134.8 

137.7 

140.7 

143.6 

146.5 

2-9 

92 

II9.2 

I22.I 

125.0 

127.9 

130.8 

133.7 

136.6 

139.6 

142-5 

145-4 

2-9 

96 

II8.3 

121.  1 

124.0 

126.9 

129.8 

132.7 

135-6 

138.4 

I4I-3 

144.2 

2-9 

SMITHSONIAN  TABLES. 


TABLE  14, 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Values   of   20OO  X  m.  m  =  — — 

56573+  i23.i0-f.oo3Z 


Mean  Tem- 
perature 
of  air 
column. 

0  Fahr. 

AI/TITUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

5100 

5200 

5300 

5400 

5500 

5600 

5700 

5800 

5900 

6000 

-20° 

188.4 

192.1 

195.8 

199.5 

203.2 

206.9 

210.6 

214.3 

218.0 

221.7 

3-7 

-16 

186.7 

190.4 

194.0 

197.7 

201.4 

205.0 

208.7 

212.3 

216.0 

219.7 

3-7 

—  12 

185.0 

188.7 

192.3 

195-9 

199-5 

203.2 

206.8 

210.4 

214.0 

217.7 

3-6 

-   8 

183.4 

187.0 

190.5 

194.1 

197.7 

201.3 

204.9 

208.5 

2I2.I 

215.7 

3-6 

-   6 

182.5 

186.1 

189.7 

!93-3 

196.9 

200.4 

204.0 

207.6 

211.  2 

214.7 

3-6 

—   4 

181.7 

185.3 

188.9 

192.4 

196.0 

199-5 

203.1 

206.7 

210.2 

213.8 

3-6 

—     2 

180.9 

184.5 

188.0 

191.6 

i95.i 

198.7 

202.2 

205.7 

209.3 

212.8 

3.5 

0 

180.1 

183.7 

187.2 

190.7 

194.3 

197.8 

201-3 

204.8 

208.4 

2II.9 

3-5 

+    2 

!79-3 

182.8 

186.4 

189.9 

193-4 

196.9 

2OO-4 

203.9 

207.5 

211.  0 

3-5 

4 

178.5 

182.0 

185-5 

189.0 

192-5 

196.0 

I99.5 

203.0 

206.5 

2IO.O 

3-5 

6 

177.8 

181.3 

184.7 

188.2 

191.7 

195-2 

198.7 

202.2 

205.6 

2O9.I 

3-5 

8 

177.0 

180.5 

183.9 

187.4 

190.9 

194.3 

197.8 

201.3 

204.8 

208.2 

3-5 

10 

176.2 

179.7 

183.1 

1  86.  6 

190.0 

193.5 

197.0 

200.4 

203.9 

207.3 

3-5 

12 

175-5 

178.9 

182.3 

185.8 

189.2 

192.7 

I96.I 

J99.5 

203.0 

206.4 

3-4 

14 

174.7 

178.1 

181.6 

185.0 

188.4 

191.8 

195.3 

198.7 

202.1 

205.5 

3-4 

16 

174.0 

177.4 

180.8 

184.2 

187.6 

191.0 

194.4 

197.8 

201.2 

204.7 

3-4 

18 

173.2 

176.6 

180.0 

183.4 

186.8 

190.2 

193.6 

197.0 

200.4 

203.8 

3-4 

20 

172.5 

175.9 

179.2 

182.6 

186.0 

189.4 

192.8 

196.2 

I99-5 

202.9 

3-4 

22 

171.8 

I75-I 

178.5 

181.9 

185.2 

188.6 

192.0 

195.3 

198.7 

202.1 

3-4 

24 

171.0 

174.4 

177.7 

181.1 

184.4 

187.8 

I9I.I 

194.5 

197.8 

201.2 

3-4 

26 

170.3 

173.6 

177.0 

180.3 

183.7 

187.0 

190.3 

!93-7 

197.0 

200.3 

3-3 

28 

169.6 

172.9 

176.2 

179.6 

182.9 

186.2 

!89.5 

192.9 

196.2 

199.5 

3«3 

30 

168.9 

172.2 

175.5 

178.8 

182.1 

185.4 

188.7 

192.0 

195.3 

198.7 

3-3 

32 

168.1 

171.4 

174.7 

178.0 

181.3 

184.6 

187.9 

191.2 

194.5 

197.8 

3-3 

34 

167.4 

170.7 

174.0 

177-3 

180.6 

183.8 

187.1 

190.4 

193.7 

197.0 

3«3 

36 

166.7 

170.0 

173.2 

176.5 

179.8 

183.1 

186.3 

189.6 

192.9 

I96.I 

3.3 

38 

166.0 

169.3 

172.5 

175.8 

179.0 

182.3 

185-5 

188.8 

192.0 

195.3 

3-3 

40 

165-3 

168.5 

171.8 

I75.o 

178.2 

181.5 

184.7 

188.0 

191.2 

194.4 

3.2 

42 

164.6 

167.8 

171.0 

174.3 

177.5 

180.7 

183-9 

187.2 

190.4 

193.6 

3-2 

44 

163.9 

167.1 

170.3 

173.5 

176.7 

179.9 

183.1 

186.4 

189.6 

192.8 

3.2 

46 

163.2 

166.4 

172.8 

176.0 

179.2 

182.4 

185.6 

188.7 

I92.O 

3«2 

48 

162.5 

165.6 

i68.'8 

172.0 

175-2 

178.4 

181.6 

184.8 

187.9 

I9I.I 

3-2 

50 

161.8 

164.9 

168.1 

I7L3 

174.4 

177.6 

180.8 

184.0 

187.1 

190.3 

3«2 

52 

l6l.I 

164.2 

167.4 

170.5 

173-7 

176.9 

180.0 

183.2 

186.3 

189.5 

3-2 

54 

160.4 

163.5 

166.7 

169.8 

173.0 

176.1 

179.2 

182.4 

185.5 

188.7 

3-1 

56 

159-7 

162.8 

166.0 

169.1 

172.2 

175.4 

178.5 

181.6 

184.7 

187.9 

3-1 

58 

159-0 

162.1 

165-3 

168.4 

171-5 

174.6 

177.7 

180.8 

184.0 

I87.I 

3-i 

60 

158.4 

161.5 

164.6 

167.7 

170.8 

173.9 

177.0 

180.1 

183.2 

186.3 

3. 

62 

157-7 

160.8 

163.9 

167.0 

170.1 

I73-I 

176.2 

179-3 

182.4 

185.5 

3. 

64 

157-0 

160.1 

163.2 

166.3 

169.3 

172.4 

175-5 

178.6 

181.6 

184.7 

3. 

66 

156.4 

1594 

162.5 

165.6 

168.6 

171.7 

174.8 

177.8 

180.9 

184.0 

3- 

68 

155-7 

158.8 

161.8 

164.9 

167.9 

171.0 

174.0 

177.1 

180.1 

183.2 

3- 

70 

I55-I 

158.1 

161.1 

164.2 

167.2 

170.3 

173-3 

176.3 

179-4 

182.4 

3-0 

72 

154-4 

157.5 

160.5 

163.5 

166.5 

169.6 

172.6 

175-6 

178.6 

l8l.7 

3-0 

76 

153-2 

156.2 

159.2 

162.2 

165.2 

168.2 

171.2 

174.2 

177.2 

180.2 

3-° 

80 

I5L9 

154-9 

157-9 

160.8 

163.8 

166.8 

169.8 

172.8 

175-7 

178.7 

3-o 

84 

150.7 

153.6 

156.6 

159-5 

162.5 

165.5 

168.4 

171.4 

174.3 

177-3 

3-0 

88 

149-5 

152.4 

155.3 

158.3 

161.2 

164.1 

167.0 

170.0 

172.9 

175-8 

2-9 

92 

148.3 

151.2 

I54.I 

i57.o 

159.9 

162.8 

165-7 

168.6 

I7I.5 

174.4 

2.9 

96 

147.1 

150.0 

152.9 

155.7 

158.6 

161.5 

164.4 

167.3 

170.2 

173.0 

2-9 

SMITHSONIAN  TABLES. 


6.5 


TABLE  14. 

REDUCTION     OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Values   of    2000  X  m.  m  =  — — - 

56573+i23.i0+.oo3Z 


Mean  Tem- 
perature 
of  sir 
column. 
0  Fahr. 

AI/TITUDE  OF  STATION  IN   FEET   (z). 

Differ- 
ence 
for 
100 
feet. 

6100 

6200 

6300 

6400 

6500 

6600 

6700 

6800 

6900 

7000 

-20° 

225.4 

229.1 

232.8 

236.4 

240.1 

243.8 

247.5 

251.2 

254-9 

258.6 

3.7  ; 

-16 

223.3 

227.0 

230.6 

234.3 

237-9 

241.6 

245-3 

248.9 

252.6 

256.2 

3-7 

—  12 

221.3 

224.9 

228.5 

232.2 

235.8 

239-4 

243.0 

246.7 

250.3 

253-9 

3.6 

-   8 

219.3 

222.9 

226.5 

230.1 

233.7 

237.3 

240.9 

244.5 

248.1 

251.6 

3-6 

-   6 

218.3 

221.9 

225.5 

229.1 

232.6 

236.2 

239.8 

243-4 

246.9 

250.5 

3.6 

—   4 

217.4 

220.9 

224.5 

228.0 

231.6 

235-2 

238.7 

242.3 

245.8 

249-4 

3-6 

—     2 

216.4 

219.9 

223.5 

227.0 

230.6 

234:1 

237.7 

241.2 

244.8 

248.3 

3-5 

0 

215-4 

219.0 

222.5 

226.0 

229.6 

233-1 

236.6 

240.1 

243-7 

247.2 

3-5 

+    2 

214.5 

218.0 

221.5 

225.0 

228.5 

232.1 

235.6 

239.1 

242.6 

246.1 

3-5 

4 

213-5 

217.0 

220.5 

224.0 

227.5 

231.0 

234.5 

238.0 

241-5 

245.0 

3-5 

6 

212.6 

216.1 

219.6 

223.1 

226.6 

230.0 

233-5 

237.0 

240.5 

244.0 

3-5 

8 

2II.7 

215-2 

218.6 

222.1 

225.6 

229.0 

232.5 

236.0 

239-4 

242.9 

3-5 

10 

210.8 

214.2 

217.7 

221.  1 

224.6 

228.0 

231-5 

235-0 

238.4 

241.9 

3-5 

12 

209.9 

213.3 

216.7 

220.2 

223.6 

227.1 

230.5 

233.9 

237.4 

240.8 

3-4 

14 

212.4 

215-8 

219.2 

222.7 

226.1 

229.5 

232.9 

236.4 

239.8 

3-4 

16 

208.  1 

211.5 

214.9 

218.3 

221.7 

225.1 

228.5 

231.9 

235-3 

238.8 

3-4 

18 

207.2 

210.6 

214.0 

217.4 

220.8 

224.2 

227.6 

230.9 

234.3 

237.7 

34 

20 

206.3 

209.7 

213-1. 

216.4 

219.8 

223.2 

226.6 

230.0 

233-3 

236.7 

3-4 

22 

205.4 

208.8 

212.2 

215.5 

218.9 

222.3 

225.6 

229.0 

232.4 

235-7 

3-4 

24 

204.6 

207.9 

2II-3 

214.6 

218.0 

221.3 

224.7 

228.0 

231-4 

234-7 

3.4 

26 

203.7 

207.0 

210.4 

213.7 

217.0 

220.4 

223.7 

227.0 

230.4 

233-7 

3-3 

28   " 

202.8 

206.2 

209.5 

212.8 

216.1 

219.4 

222.8 

226.1 

229.4 

232.7 

3-3 

30 

202.0 

205.3 

208.6 

2II.9 

215.2 

218.5 

221.8 

225.1 

228.4 

231.8 

3-3 

32 

201.  1 

204.4 

207.7 

211.  0 

214.3 

217.6 

220.9 

224.2 

227.5 

230.8 

3-3 

34 

200.2 

203.5 

206.8 

2IO.I 

213.4 

216.7 

219.9 

223.2 

226.5 

229.8 

3.3 

36 

199.4 

202.  7 

205.9 

209.2 

212.5 

215.7 

219.0 

222.3 

225.5 

228.8 

3-3 

38 

198.5 

201.8 

205.0 

208.3 

211.  6 

214.8 

218.1 

221.3 

224.6 

227.8 

3-3 

40 

197.7 

200.9 

204.2 

207.4 

210.6 

213.9 

217.1 

220.4 

223.6 

226.8 

3-2 

42 

196.8 

200.1 

203.3 

206.5 

209.7 

213.0 

216.2 

219.4 

222.6 

225.9 

3-2 

44 

196.0 

199.2 

2O2-4 

205.6 

208.8 

2*2.1 

215.3 

218.4 

221.7 

224.9 

3-2 

46 

195.2 

198.4 

201.5 

204.7 

207.9 

211.  1 

214.3 

217.5 

220.  7 

223.9 

3-2   j 

48 

194-3 

197.5 

2OO.7 

203.9 

207.0 

210.2 

2134 

216.6 

219.8 

223.0 

3.2 

50 

193.5 

196.6 

I99.8 

203.0 

206.2 

209.3 

212.5 

215.7 

218.8 

222.0 

3.2 

52 

192.6 

IQ5.8 

199.0 

2O2.I 

205.3 

208.4 

211.  6 

214.7 

217-9 

221.  1 

3-2 

54 

I9I.8 

195.0 

I98.I 

2OI.3 

204.4 

207.5 

210.7 

213.8 

217.0 

220.1 

3-i 

56 

igi.O 

I94.I 

197.3 

2OO.4 

203.5 

206.7 

209.8 

212.9 

216.0 

219.2 

3-i 

58 

I9O.2 

193.3 

196.4 

J99-5 

202.7 

205.8 

208.9 

212.0 

215.1 

218.3 

3-r 

60 

189.4 

192.5 

195.6 

198.7 

201.8 

204.9 

208.0 

211.  1 

214.2 

217-3 

3-i 

62 

188.6 

I9I.7 

194-8 

197.9 

2OI.O 

204.1 

207.2 

210.2 

213.3 

216.4 

3-1 

64 

187.8 

190.9 

194.0 

197.0 

2OO.I 

203.2 

206.3 

209.3 

212.4 

215.5 

3-i 

66 

187.0 

I9O.I 

I93-I 

196.2 

199.3 

202.3 

205.4 

208.5 

211.5 

214.6 

3-i 

68 

186.2 

189.3 

192.3 

195-4 

198.4 

201.5 

204.6 

207.6 

210.7 

213.7 

3-0 

70 

185.5 

188.5 

I9I.5 

194.6 

197.6 

2OO.7 

203.7 

206.7 

209.8 

212.8 

3-0 

72 

184.7 

187.7 

190.8 

193.8 

196.8 

I99.8 

202.9 

205.9 

208.9 

2II.9 

3.o 

76 

183.2 

186.2 

189.2 

192.2 

195-2 

198.2 

201.2 

204.2 

207.2 

2IO.2 

3-0 

80 

l8l.7 

184.7 

187.6 

190.6 

193.6 

196.6 

199.6 

202.5 

205.5 

208.5 

3-0 

84 

180.2 

183.2 

I86.I 

189.1 

I92.O 

195.0 

197.9 

2OO.9 

203.8 

206.8 

3-0 

88 

178.8 

l8l.7 

184.6 

187.6 

190.5 

193.4 

196.3 

199.3 

202.2 

205.1 

2-9 

92 

177-3 

180.2 

183.2 

186.1 

189.0 

I9I.9 

194.8 

197.7 

200.6 

203.5 

2.9 

96 

175-9 

178.8 

I8I.7 

184.6 

187.5 

190.3 

193.2 

196.1 

199.0 

201.9 

2.9 

SMITHSONIAN  TABLES. 


66 


TABLE  14 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 


Values   of   2000  X  m. 


-  I0+-003Z 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

AI/TITUDE  OF  STATION  IN  FEET  (z). 

Differ- 
ence 
for 
100 
Feet. 

7100 

7200 

7300 

7400 

7500 

7600 

7700 

7800 

7900 

8000 

-20° 

262.3 

266.0 

269.7 

273-4 

277.1 

280.8 

284.5 

288.1 

291.8 

295.5 

3-7 

-16 

259-9 

263.6 

267.2 

270.9 

274-5 

278.2 

281.9 

285.5 

289.2 

292.8 

3-7 

—  12 

257.6 

261.2 

264.8 

268.4 

272.1 

275.7 

279-3 

282.9 

286.6 

290.2 

3-6 

-   8 

255-2 

258.8 

262.4 

266.0 

269.6 

273.2 

276.8 

280.4 

284.0 

287.6 

3.6 

-    6 

254.1 

257-7 

261.3 

264.8 

268.4 

272.0 

275.6 

279.1 

282.7 

286.3 

3-6 

—    4 

253-0 

256.5 

260.1 

263.7 

267.2 

270.8 

274.3 

277.9 

281.5 

285.0 

3.6 

—     2 

251-8 

255-4 

258.9 

262.5 

266.0 

269.6 

273.1 

276.7 

280.2 

283.8 

3-5 

0 

250.7 

254-3 

257.8 

261.3 

264.9 

268.4 

271.9 

275.4 

279.0 

282.5 

3-5 

+     2 

249.6 

253-1 

256.7 

260.2 

263.7 

267.2 

270.7 

274.2 

277.8 

281.3 

3.5 

4 

248.5 

252.0 

255-5 

259.0 

262.5 

266.0 

269.5 

273.0 

276.5 

280.0 

3-5 

6 

247-5 

250.9 

254-4 

257.9 

261.4 

264.9 

268.4 

271.8 

275-3 

278.8 

3.5 

8 

246.4 

249.8 

253.3 

256.8 

260.3 

263.7 

267.2 

270.7 

274.1 

277.6 

3-5 

10 

245-3 

248.8 

252.2 

255-7 

259-1 

262.6 

266.0 

269.5 

272.9 

276.4 

3-5 

12 

244-3 

247-7 

251.1 

254-6 

258.0 

261.4 

264.9 

268.3 

271.8 

275.2 

3.4 

14 

243.2 

246.6 

250.1 

253-5 

256.9 

260.3 

263.8 

267.2 

270.6 

274.0 

3-4 

16 

242.2 

245.6 

249.0 

252.4 

255-8 

259.2 

262.6 

266.0 

269.4 

272.8 

3-4 

18 

241.1 

244-5 

247.9 

251-3 

254.7 

258.1 

261.5 

264.9 

268.3 

271.7 

3-4 

20 

240.1 

243.5 

246.9 

250.2 

253.6 

257.o 

260.4 

263.8 

267.1 

270.5 

3-4 

22 

239- 

242.4 

245-8 

249.2 

252.5 

255-9 

259-3 

262.6 

266.0 

269.4 

3-4 

24 

238. 

241.4 

244.8 

248.1 

251-5 

254.8 

258.2 

261.5 

264.9 

268.2 

3-4 

26 

237. 

240.4 

243-7 

247.1 

250.4 

253-8 

257-1 

260.4 

263.8 

267.1 

3-3 

28 

236. 

2394 

242.7 

246.0 

249.4 

252.7 

256.0 

259-3 

262.7 

266.0 

3-3 

30 

235. 

238-4 

241.7 

245.0 

248.3 

251.6 

254.9 

258.2 

261.5 

264.8 

3-3 

32 

234. 

237.4 

240.7 

243-9 

247.2 

250.5. 

253.8 

257.1 

260.4 

263.7 

3-3 

34 

233- 

236.3 

239-6 

242.9 

246.2 

249-5 

252.8 

256.0 

259.3 

262.6 

3-3 

36 

232. 

235.3 

238.6 

241.9 

245-1 

248.4 

25L7 

254.9 

258.2 

261.5 

3.3 

38 

231. 

234-3 

237.6 

240.8 

244.1 

247-3 

250.6 

253-9 

257.1 

260.4 

3-3 

40 

230. 

233.3 

236.6 

239.8 

243.0 

246.3 

249-5 

252.8 

256.0 

259-2 

3.2 

42 

229. 

232.3 

235-5 

238.8 

242.0 

245.2 

248.4 

251-7 

254-9 

258.1 

3-2 

44 

228.1 

231.3 

234-5 

237-7 

241.0 

244.2 

247.4 

250.6 

253-8 

257.0 

3-2 

46 

227.1 

230.3 

233-5 

236.7 

239-9 

243-1 

246.3 

249-5 

252.7 

255-9 

3-2 

48 

226.2 

229.3 

232.5 

235-7 

238.9 

242.1 

245-3 

248.4 

251.6 

254-8 

3.2 

50 

225.2 

228.4 

231.5 

234.7 

237-9 

241.0 

244.2 

247-4 

250.5 

253.7 

3.2 

52 

224.2 

227.4 

230.5 

233.7 

236.8 

240.0 

243.2 

246.3 

249-5 

252.6 

3.2 

54 

223.3 

326.4 

229.5 

232.7 

235-8 

239.0 

242.1 

245-3 

.248.4 

251-5 

3. 

56 

222.3 

225.4 

228.6 

231.7 

234.8 

238.0 

241.1 

244.2 

247-3 

250.5 

3. 

58 

221.4 

224-5 

227.6 

230.7 

233-8 

236.9 

240.1 

243.2 

246.3 

249.4 

3. 

60 

220.4 

223-5 

226.6 

229.7 

232.8 

235-9 

239.1 

242.2 

245-3 

248.4 

3- 

62 

219-5 

222.6 

225.7 

228.8 

231.9 

235-0 

238.0 

241.1 

244.2 

247-3 

3- 

64 

218.6 

221.7 

224.7 

227.8 

230.9 

234-0 

237.0 

240.1 

243.2 

246.3 

3- 

66 

217-7 

22O.7 

223.8 

226.9 

229.9 

233-0 

236.1 

239.1 

242.2 

245-2 

3- 

68 

216.8 

219.8 

222.9 

225.9 

229.0 

232.0 

235.1 

238.1 

241.2 

244.2 

3.o 

70 

215-9 

218.9 

221.9 

225.0 

228.0 

231.1 

234.1 

237.1' 

240.2 

243.2 

3-0 

72 

215.0 

218.0 

221.  0 

224.1 

227.1 

230.1 

233.1 

236.2 

239.2 

242.2 

3-0 

76 

213.2 

216.2 

219.2 

222.2 

225.2 

228.2 

231.2 

234.2 

237.2 

240.2 

3-o 

80 

211.5 

214.4 

217.4 

220.4 

223.4 

226.4 

229.3 

232.3 

235-3 

238.3 

3.o 

84 

209.8 

212.7 

215.7 

218.6 

221.6 

224.5 

227.5 

230.4 

233.4 

236.3 

2-9 

88 

208.1 

211.  0 

213.9 

216.9 

219.8 

222.7 

225.6 

228.6 

231-5 

234.4 

2-9 

92 

206.4 

209.3 

212.2 

2I5.I 

218.0 

220.9 

223.8 

226.7 

229.7 

232.6 

2.9 

96 

204.8 

207.6 

210.5 

213.4 

216.3 

219.2 

222.1 

224.9 

227.8 

230.7 

2-9 

SMITHSONIAN  TABLES. 


TABLE  14. 

REDUCTION    OF  THE    BAROMETER   TO    SEA  LEVEL. 

ENGLISH    MEASURES. 
Values   of    2000  X  m.  m  =  -~ 


Mean  Tem- 
perature 
of  air 
column. 
0  Fahr. 

ALTITUDE  OF  STATION  IN   FEET   (z). 

Differ- 
ence 
for 
100 
Feet. 

8100 

8200 

8300 

840& 

8500 

8600 

8700 

8800 

8900 

9000 

-20° 

299.2 

302.9 

306.6 

310.3 

314.0 

317.7 

321.4 

325.1 

328.8 

332.5 

3.7 

-16 

296.5 

300.2 

303-8 

307.5 

311-1 

314.8 

318.4 

322.1 

325.8 

329-4 

3-7 

—  12 

293.8 

297.4 

301.1 

304.7 

308.3 

3H.9 

315.6 

319.2 

322.8 

326.4 

3.6 

-   8 

291.2 

294.8 

298.4 

302.0 

305-5 

309.1 

312.7 

316.3 

319.9 

323-5 

3.6 

-    6 

289.9 

293-5 

297.0 

300.6 

304.2 

307.8 

3H.3 

3!4-9 

318.5 

322.1 

3-6 

-    4 

288.6 

292.1 

295.7 

299.3 

302.8 

306.4 

309-9 

3I3-5 

3i7.i 

320.6 

3-6 

—     2 

287.3 

290.9 

294.4 

297.9 

301.5 

305-0 

308.6 

312.1 

315.7 

319.2 

3-5 

0 

286.0 

289.6 

293.1 

296.6 

300.2 

303.7 

307.2 

310.7 

314.3 

317.8 

3-5 

-f     2 

284.8 

288.3 

291.8 

295.3 

298.8 

302.4 

305-9 

312.9 

316.4 

3-5 

4 

283.5 

287.0 

290.5 

294.0 

297.5 

301.0 

304-5 

308.0 

3H.5 

315-0 

3.5 

6 

282.3 

285.8 

289.3 

292.7 

296.2 

299.7 

303-2 

306.7 

310.2 

313-6 

3-5 

8 

281.1 

284.5 

288.0 

29L5 

294.9 

298.4 

301.9 

305-3 

308.8 

312.3 

3-5 

10 

279.8 

283.3 

286.8 

290.2 

293.7 

297.1 

300.6 

304-0 

307.5 

310.9 

3-5 

12 

278.6 

282.1 

285.5 

289.0 

292.4 

295.8 

299.3 

302.7 

306.2 

309.6 

3-4 

14 

277-5 

280.9 

284.3 

287.7 

291.1 

294.6 

298.0 

301.4 

304.8 

308.3 

3.4 

16 

276.3 

279.7 

283.1 

286.5 

289.9 

293.3 

296.7 

300.1 

303-5 

306.9 

3-4 

18 

275-1 

278.5 

281.9 

285.3 

288.7 

292.1 

295.4 

298.8 

302.2 

305.6 

3-4 

20 

273.9 

277.3 

280.7 

284.0 

287.4 

290.8 

294.2 

297.6 

300.9 

304.3 

3-4 

22 

272.7 

276.1 

279-5 

282.8 

286.2 

289.6 

292.9 

296.3 

299.7 

303.0 

3-4 

24 

271.6 

274-9 

278.3 

281.6 

285.0 

288.3 

291.7 

295.0 

298.4 

301.8 

3-4 

26 

270.4 

273.8 

277.1 

280.5 

283.8 

287,1 

290.5 

293.8 

297.1 

300.5 

3-3 

28 

269.3 

272.6 

275.9 

279-3 

282.6 

285.9 

289.2 

292.6 

295-9 

299.2 

3-3 

30 

268.2 

271.5 

274.8 

278.1 

281.4 

284.7 

288.0 

291.3 

294.6 

297.9 

3-3 

32 

267.0 

270.3 

273.6 

276.9 

280.2 

283.5 

286.8 

290.1 

293.4 

296.7 

3-3 

34 

265.9 

269.2 

272.4 

275-7 

279.0 

282.3 

285.6 

288.8 

292.1 

2954 

3-3 

36 

264.7 

268.0 

271.3 

274-5 

277.8 

281.1 

284.3 

287.6 

290.9 

294.1 

3-3 

38 

263.6 

266.9 

270.1 

273-4 

276.6 

279.9 

283.1 

286.4 

289.6 

292.9 

3-3 

40 

262.5 

265.7 

269.0 

272.2 

2754 

278.7 

281.9 

285.2 

288.4 

291.6 

3-2 

42 

261.4 

264.6 

267.8 

271.0 

274-3 

277.5 

280.7 

283.9 

287.2 

290.4 

3-2 

44 

260.2 

263.4 

266.7 

269.9 

273.1 

276.3 

279-5 

282.7 

285.9 

289.1 

3-2 

46 

259-  1 

262.3 

265-5 

268.7 

271.9 

275.1 

278.3 

281.5 

284.7 

287.9 

3-2 

48 

258.0 

261.2 

264.4 

267.5 

270.7 

273.9 

277.1 

280.3 

283.5 

286.6 

3-2 

50 

256.9 

260.1 

263.2 

266.4 

269.6 

272.7 

275-9 

279.1 

282.2 

285.4 

3-2 

52 

255.8 

258.9 

262.1 

265.3 

268.4 

271.6 

274.7 

277.9 

281.0 

284.2 

3-1 

54 

254.7 

257.8 

261.0 

264.  i 

267.3 

270.4 

273.5 

276.7 

279.8 

283.0 

3-i 

56 

253.6 

256.7 

259-9 

263.0 

266.1 

269.3 

272.4 

275-5 

278.6 

281.8 

3-i 

58 

252.5 

255.6 

258.8 

261.9 

265.0 

268.1 

271.2 

274.3 

277.5 

280.6 

3.i 

60 

251-5 

254.6 

257-7 

260.8 

263.9 

267.0 

270.1 

273-2 

276.3 

279-4 

3-1 

62 

250.4 

253-5 

256.6 

259-7 

262.8 

265.9 

268.9 

272.0 

275-1 

278.2 

3-1 

64 

249.4 

252.4 

255-5 

258.6 

261.7 

264.7 

267.8 

270.9 

274.0 

277.1 

3-i 

66 

248.3 

251.4 

254.4 

257.5 

260.6 

263.6 

266.7 

269.8 

272.8 

275.9 

3-i 

68 

247.3 

250.3 

253-4 

256.4 

259.5 

262.5 

265.6 

268.6 

271.7 

274-7 

3-o 

70 

246.3 

249.3 

252.3 

255-4 

258.4 

261.4 

264.5 

267.5 

270:6 

273.6 

3-o 

72 

245.2 

248.3 

251-3 

254-3 

257.3 

260.4 

263.4 

266.4 

269.4 

272.5 

3-° 

76 

243-2 

246.2 

249.2 

252.2 

255-2 

258.2 

261.2 

264.2 

267.2 

270.2 

3-o 

80 

241.2 

244.2 

247.2 

250.2 

253-1 

256.1 

259-  1 

262.1 

265.1 

268.0 

3-0 

84 

239.3 

242.2 

245.2 

248.1 

251.1 

254.1 

257.0 

260.0 

262.9 

265-9 

2.9 

88 

2374 

240.3 

243.2 

246.1 

249.1 

252.0 

254-9 

257.9 

260.8 

263.7 

2.9 

92 

235-5 

238.4 

241-3 

244.2 

247.1 

250.0 

252.9 

255-8 

258.7 

261.6 

2.9 

96 

233-6 

236.5 

239-4 

242.2 

245-1 

248.0 

250.9 

253.8 

256.7 

259.5 

2.9 

SMITHSONAN  TABLES. 


68 


TABLE  15 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Correction    of   200O  m    for    Latitude:    2000  m  X  0.002662  cos  2  ^>. 

For  latitudes  o°  to  45°,  ttie  correction  is  to  be  subtracted. 
For  latitudes  45°  to  90°,  the  correction  is  to  be  added. 


onnn  m 

LATITUDE. 

cOOO  m. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

10 

o.o 

0.0 

o.o 

o.o 

o.o 

o.o 

o.o 

o.o 

o.o 

0.0 

20 

O.I 

O.I 

O.I 

o.o 

o.o 

0.0 

0.0 

0.0 

0.0 

o.o 

30 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

0.0 

o.o 

40 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

o.o 

o.o 

0.0 

50 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

o.o 

60 

0.2 

O.2 

O.2 

O.I 

O.I 

O.I 

O.I 

O.I 

o.o 

0.0 

70 

O.2 

0.2 

0.2 

0.2 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

80 

0.2 

0.2 

0.2 

0.2 

0.2 

O.I 

O.I 

O.I 

0.0 

o.o 

90 

O.2 

O.2 

O.2 

O.2 

O.2 

O.2 

O.I 

O.I 

o.o 

0.0 

100 

0-3 

0-3 

0-3 

O.2 

0.2 

O.2 

O.I 

O.I 

0.0 

0.0 

no 

o-3 

0-3 

0-3 

0-3 

O.2 

0.2 

O.I 

O.I 

O.I 

0.0 

120 

o-3 

0-3 

o-3 

0.3 

0.2 

0.2 

0.2 

O.I 

O.I 

o.o 

130 

0.3 

0-3 

o-3 

°-3 

0-3 

O.2 

0.2 

O.I 

O.I 

o.o 

140 

0.4 

0.4 

0.4 

0.3 

0-3 

0.2 

0.2 

O.I 

O.I 

0.0 

150 

0.4 

0.4 

0.4 

o-3 

o-3 

0-3 

O.2 

O.I 

O.I 

o.o 

160 

0.4 

0.4 

0.4 

0.4 

o-3 

0-3 

0.2 

O.I 

O.I 

0.0 

170 

0.5 

0.4 

0.4 

0.4 

0.3 

o-3 

O.2 

O.2 

O.I 

o.o 

180 

0.5 

0.5 

0.5 

0.4 

0.4 

o-3 

0.2 

0.2 

O.I 

o.o 

190 

0.5 

0.5 

0.5 

0.4 

0.4 

0.3 

0;3 

0.2 

O.I 

0.0 

200 

0.5 

0.5 

0.5 

0.5 

0.4 

0-3 

0-3 

0.2 

O.I 

0.0 

210 

0.6 

0.6 

0.5 

0.5 

0.4 

0.4 

0-3 

0.2 

O.I 

0.0 

220 

0.6 

0.6 

0.6 

0.5 

0.4 

0.4 

0-3 

O.2 

O.I 

o.o 

230 

0.6 

0.6 

0.6 

0-5 

0-5 

0.4 

0-3 

0.2 

O.I 

0.0 

240 

0.6 

0.6 

0.6 

0.6 

o-5 

0.4 

0-3 

O.2 

O.  T 

0.0 

250 

0.7 

0.7 

0.6 

0.6 

0-5 

0.4 

0-3 

0.2 

O.I 

0.0 

260 

0.7 

0.7 

0.7 

0.6 

0.5 

0.4 

o-3 

O.2 

O.I 

0.0 

270 

0.7 

0.7 

0.7 

0.6 

0.6 

o-5 

0.4 

0.2 

O.I 

o.o 

280 

0.7 

0.7 

0.7 

0.6 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

290 

0.8 

0.8 

0.7 

0.7 

0.6 

0-5 

0.4 

0-3 

O.I 

o.o 

300 

0.8 

0.8 

0.8 

0.7 

0.6 

0-5 

0.4 

0-3 

O.I 

0.0 

310 

0.8 

0.8 

0.8 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

0.0 

320 

0.9 

0.8 

0.8 

0.7 

0.7 

0.5 

0.4 

0-3 

O.I 

o.o 

330 

0.9 

0.9 

0.8 

0.8 

0.7 

0.6 

0.4 

0.3 

0.2 

o.o 

340 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0.5 

0-3 

0.2 

0.0 

350 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

o-5 

o-3 

0.2 

0.0 

90° 

85° 

80° 

75° 

70° 

65° 

60° 

55° 

50° 

45° 

SMITHSONIAN  TABLE*. 


TABLE  16. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Bo-B=  B  (10W-1). 

Top  argument:     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT   OF  THE   BAROMETER   IN   INCHES. 

31.0 

3O.5" 

30.0 

29.5 

29.0 

28.5 

28.  0 

27.5 

27.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

1 

0.04 

0.04 

0.03 

0.03 

0.03 

0.03 

2 

0.07 

a  07 

0.07 

0.07 

0.07 

0.07 

3 

O.II 

O.II 

0.10 

0.10 

O.IO 

O.IO 

4 

0.14 

0.14 

0.14 

0.14 

0.13 

0.13 

5 

0.18 

0.18 

0.17 

0.17 

0.17 

0.16 

6 

O.2I 

0.21 

0.21 

O.2O 

O.2O 

O.2O 

0.19 

8 

0.25 
0.29 

0.25 
0.28 

0.24 
0.28 

0.24 
0.27 

0.23 
0.27 

0.23 

0.26 

0.23 
0.26 

9 

0.32 

0.32 

0.31 

0.3I 

0.30 

0.30 

0.29 

10 

0.36 

0.35 

0.35 

o-34 

0-34 

o-33 

0.32 

ii 

0.40 

0-39 

0.38 

0.38 

0-37 

0.36 

0.36 

12 

0-43 

0.42 

O.42 

0.41 

0.40 

0.40 

0-39 

J3 

0.47 

0.46 

0-45 

0.44 

0.44 

o.43 

0.42 

14 

0.50 

0.50 

0.49 

0.48 

0.47 

0.46 

0.46 

15 

0-54 

0.53 

0.52 

0.51 

0.51 

0.50 

0.49 

16 

0.58 

0.57 

0.56 

0-55 

0-54 

0-53 

0.52 

17 

0.61 

0.6o 

0-59 

0.58 

0-57 

0.56 

0-55 

18 

0.65 

0.64 

0.63 

0.62 

0.61 

0.60 

0-59 

19 

0.69 

0.67 

0.66 

0.65 

0.64 

0.63 

0.62 

20 

0.72 

0.71 

0.70 

0.69 

0.68 

0.66 

0.65 

21 

0-75 

0.73 

0.72 

0.71 

0.70 

0.69 

22 

0.78 

0.77 

0.76 

0.74 

0-73 

0.72 

0.71 

23 

0.82 

0.80 

0.79 

0.77 

0.76 

0-75 

0.74 

24 

0.85 

0.84 

0.83 

0.81 

0.80 

0.78 

0.77 

25 

0.89 

0.88 

0.86 

0.85 

0.83 

0.82 

0.80 

26 

0-93 

0.91 

0.90 

0.88 

0.87 

0.85 

0.84 

27 

0.96 

0-95 

0-93 

0.92 

0.90 

0.88 

0.87 

28 

.00 

0.98 

0.97 

0-95 

o-93 

0.92 

0.90 

29 

.04 

1.02 

1.  00 

0.98 

0.97 

0-95 

0-93 

30 

.07 

1.05 

1.04 

i.  02 

I.OO 

0.98 

0.97 

3i 

.11 

1.09 

1.07 

1.05 

1.04 

.02 

.00 

32 

.14 

I-I| 

I.  II 

.09 

1.07 

•05 

•03 

33 

.18 

1.16 

1.14 

.12 

1.  10 

.08 

.06 

34 

.22 

1.20 

1.18 

.16 

1.  14 

.12 

.10 

35 

1-25 

1.23 

1.  21 

.19 

1.  17 

•15 

•13 

36 

1.27 

1.25 

•23 

1.  21 

.18 

.16 

37 

•3* 

1.28 

.26 

1.24 

.22 

.20 

38 

•34 

1.32 

•30 

1.27 

•25 

•23 

1.  21 

39 

•38 

i-35 

•33 

I-3I 

.29 

.26 

1.24 

40 

4i 

•39 

•37 

i-34 

•32 

•30 

1.27 

4i 

•45 

•43 

.40 

1.38 

•35 

•33 

1.30 

42 

.49 

.46 

•44 

1.41 

•39 

•36 

1-34 

43 

•52 

•50 

•47 

1-45 

•42 

.40 

1-37 

44 

•56 

•53 

•5i 

1.48 

•45 

•43 

1.40 

45 

1.60 

1-57 

i-54 

1-52 

1.49 

.146 

1-44 

SMITHSONIAN  TABLES. 


TABLE  16 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 
Bo-B  =  B  (TO'M-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000m 

HEIGHT   OF  THE   BAROMETER   IN    INCHES. 

29.5 

29.0 

28.5 

28.0 

27.5 

27.O 

26.5 

26.0 

25.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

45 

•57 

•54 

1-52 

•49 

1.46 

•44 

46 

.60 

•58 

1-55 

•52 

1,50 

•47 

47 

.64 

.61 

1.58 

•56 

i-53 

•50 

48 

.68 

.65 

1.62 

•59 

1.56 

•53 

49 

•  7i 

.68 

1-65 

.62 

i.  60 

•57 

50 

•  75 

.72 

1.69 

.66 

1.63 

.60 

5i 

.78 

•  75 

1.72 

.69 

1.66 

•63 

52 

.82 

•79 

1.76 

•73 

1.70 

.67 

53 

.86 

1.82 

1.79 

.76 

i-73 

.70 

54 

.89 

1.86 

1.83 

.80 

1.76 

•73 

1.70 

55 

•93 

1.90 

1.86 

•83 

i.  80 

.76 

•73 

56 

.96 

i-93 

1.90 

.86 

1.83 

.80 

.76 

57 

2.OO 

1.97 

i-93 

.90 

1.87 

•83 

.80 

58 

2.04 

2.OO 

1.97 

•93 

1.90 

.86 

•83 

59 

2.07 

2.O4 

2.00 

•97 

i-93 

.90 

.86 

60 

2.  II 

2.07 

2.04 

2.00 

1.97 

•93 

.90 

61 

2.  II 

2.07 

2.O4 

2.00 

.96 

•93 

62 

2.15 

2.  1  1 

2.07 

2.03 

2.00 

.96 

63 

2.18 

2.14 

2.  1  1 

2.07 

2.03 

•99 

64 

2.22 

2.18 

2.14 

2.IO 

2.O6 

2.03 

65 

2.25 

2.21 

2.18 

2.14 

2.10 

2.06 

66 

2.29 

2.25 

2.21 

2.17 

2.13 

2.09 

67 

2-33 

2.29 

2.25 

2.21 

2.17 

2.13 

68 

2.36 

2.32 

2.28 

2.24 

2.  2O 

2.16 

69 

2.40 

2.36 

2.32 

2.27 

2.23 

2.19 

70 

2-43 

2-39 

2-35 

2.31 

2.27 

2.22 

7i 

2.47 

2-43 

2.38 

2-34 

2.30 

2.26 

2.21 

72 

2.51 

2.46 

2.42 

2.3« 

2-33 

2.29 

2.25 

73 

2-54 

2.50 

2-45 

2.41 

2-37 

2.32 

2.28 

74 

2.53 

2.49 

2-45 

2.40 

2.36 

2.31 

75 

2-57 

2.53 

2.48 

2-43 

2-39 

2-34 

76 

2.61 

2.56 

2.51 

2.47 

2.42 

2.38 

77 

2.64 

2.60 

2-55 

2.50 

2.46 

2.41 

78 

2.68 

2.63 

2.58 

2-54 

2.49 

2.44 

79 

-  2.71 

2.67 

2.62 

2-57 

2.52 

2.48 

80 

2-75 

2.70 

2.65 

2.60 

2.56 

2.51 

81 

2.79 

2.74 

2.69 

2.64 

2-59 

2.54 

82 

2.82 

2.77 

2.72 

2.67 

2.62 

2-57 

83 

2.86 

2.8l 

2.76 

2.71 

2.66 

2.61 

84 

2.89 

2.84 

2.79 

2.74 

2.69 

2.64 

85 

2-93 

2.88 

2.83 

2.78 

2.72 

2.67 

86 

2.97 

2.91 

2.86 

2.81 

2.76 

2.71 

87 

3.00 

2-95 

2.90 

2.84 

2.79 

2.74 

88 

3-04 

2-99 

2-93 

2.88 

2.83 

2.77 

2.72 

89 

3.08 

3.02 

2.97 

2.91 

2.86 

2.81 

2-75 

90 

3-ii 

3-o6 

3.00 

2-95 

2.89 

2.84 

2.78 

SMITHSONIAN  TABLES. 


TABLE  16. 


REDUCTION  -OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B=B  (10W-1). 

Top  argument :     Height  of  the  barometer  (B). 
Side  argument:     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

28.O 

27.5   I 

27.0 

26.5 

26.O 

25.5 

25.0 

24.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

90 

3.06 

3.00 

2-95 

2.89 

2.84 

2.78 

91 

3.09 

3-04 

2.98 

2-93 

2.87 

2.82 

92 

3-13 

3-07 

3.02 

2.96 

2.91 

2.85 

93 

3-l6 

3-H 

3-05 

2.99 

2.94 

2.88 

94 

3-20 

3-14 

3-09 

3-03 

2.97 

2.91 

95 

3-24 

3-i8 

3.12 

3.06 

3.01 

2-95 

96 

3-27 

3.21 

3-16 

3-10 

3-04 

2.98 

97 

3-31 

3-25 

3-19 

3-13 

3-07 

3.01 

98 

3-34 

3-28 

3.22 

3-17 

3-H 

3-05 

99 

3.38 

3-32 

3-26 

3.20 

3-14 

3.08 

100 

3-42 

3.36 

3.29 

3-23 

3-17 

3-« 

101 

3-45 

3-39 

3-33 

3-27 

3.21 

3-14 

102 

3-49 

3-43 

3.36 

3.30 

3-24 

3-i8 

103 

3-53 

3-46 

3-40 

3-34 

3-27 

3.21 

104 

3.56 

3-50 

3-43 

3-37 

3-31 

3-24 

105 

3-6o 

3-53 

3-47 

3-41 

3-34 

3-28 

3-21 

106 

3-57 

3-50 

3-44 

3-37 

3-31 

3-24 

107 

3-6i 

3-54 

3-47 

3-4i 

3-34 

3.28 

108 

3-64 

3-57 

3-5i 

3-44 

3.38 

3-31 

109 

3-68 

3-6i 

3-54 

3.48 

3.4i 

3-34 

140 

3-7i 

3-65 

3.58 

3-5i 

3-44 

3.38 

in 

3-75 

3-68 

3-61 

3-54 

3-48 

3-41 

112 

3.78 

3-72 

3-65 

3.58 

3-5i 

3-44 

US 

3-82 

3-75 

3-68 

3-61 

3-54 

3-47 

114 

3-86 

3-79 

3-72 

3.65 

3.58 

3-5i 

115 

3.89 

3-82 

3-75 

3-68 

3-6i 

3-54 

116 

3-93 

3.86 

3-79 

3-71 

3-64 

3-57 

117 

3-97 

3-89 

3-82 

3-75 

3.68 

3-60 

118 
119 

4.00 
4.04 

& 

3-86 
3-89 

3-78 
3-82 

3-71 

3-74 

3-64 
3-67 

120 

4.07 

4.00 

3-93 

3-85 

3-78 

3-70 

121 

4.  li 

4.04 

3-96 

3.89 

3-8i 

3-74 

122 

4.07 

4.00 

3-92 

3.85 

3-77 

3.69 

123 

4.11 

4-03 

3-96 

3-88 

3-8o 

3-73 

124 

4.14 

4.07 

3-99 

3-91 

3-84 

3-76 

125 

4.18 

4.10 

4.02 

3-95 

3-87 

3-79 

126 

4.22 

4.14 

4.06 

3.98 

3-9° 

3-82 

127 

4-25 

4.17 

4.09 

4.01 

3-94 

3.86 

128 

4.29 

4.21 

4-13 

4.05 

3-97 

3-89 

129 

4.32 

4-24 

4.16 

4.08 

4.00 

3.92 

130 

4-36 

4.28 

4.20 

4.12 

4.04 

3.96 

131 

4.40 

4-31 

4-23 

4-15 

4.07 

3-99 

132 

4-43 

4-35 

4.27 

4.19 

4.10 

4.02 

133 

4-47 

4-38 

430 

4.22 

4.14 

4-05 

134 

4-50 

4.42 

4-34 

4-25 

4.17 

4.09 

135 

4-54 

4.46 

4-37 

4.29 

4.20 

4.12 

i     - 

SMITHSONIAN  TABLES. 


72 


TABLE  16. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo— B  =  B  (10W-1>. 

Top  argument :     Height  of  the  barometer  (B). 
Side  argument: 


Values  of  2000  in  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

26.5 

26.0 

25.5 

25.0 

24.5 

24.O 

23.5 

23.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

135 

4.46 

4-37 

4.29 

4.2O 

4.12 

136 

4-49 

4.41 

4.32 

4-24 

4-15 

137 

4-53 

4-44 

4.36 

4.27 

4.19 

138 

4-56 

4.48 

4-39 

4-3° 

4.22 

139 

4.60 

4-51 

4-43 

4.34 

4-25 

140 

4-63 

4-55 

4.46 

4.37 

4.28 

4.20 

141 

4.67 

4.58 

4-49 

4.41 

4-32 

4-23 

142 

4.71 

4.62 

4-53 

4.44 

4-35 

4.26 

143 

4-74 

4-65 

4-56 

4-47 

4.38 

4-3° 

'  .  «    ?' 

144 

4.78 

4.69 

4.60 

4-51 

4.42 

4-33 

145 

4.81 

4.72 

4-63 

4-54 

4-45 

4.36 

146 

4-85 

4.76 

4.67 

4-58 

4.48 

4-39 

147 

148 

4.89 
4.92 

4-79 
4-83 

4.70 
4-74 

4.61 
4.64 

4-52 

4-55 

443 
4.46 

149 

4.96 

4.87 

4-77 

4.68 

4.58 

4-49 

150 

5-00 

4.90 

4.81 

4.71 

4.62 

4.52 

151 

5-03 

4-94 

4.84 

4-75 

4-65 

4.56 

152 

5-07 

4-97 

4.88 

4-78 

4.69 

4.59 

!53 

5-10 

5-oi 

4.91 

4.82 

4.72 

4.62 

154 

5-04 

4-95 

4-85 

4-75 

4.66 

155 

5-o8 

4.98 

4.88 

4-79 

4.69 

156 

5-12 

5-02 

4.92 

4.82 

4.72 

157 

5-15 

5-05 

4-95 

4-85 

4-75 

158 

5.19 

5-09 

4-99 

4.89 

4-79 

159 

5-22 

5-12 

5-02 

4.92 

4.82 

4.72 

160 

5-26 

5-i6 

5-06 

4.96 

4-85 

4-75 

161 

5-29 

5-19 

5-09 

4-99 

4.89 

4-79 

162 
163 

5-33 
5-37 

5-23 
5.26 

5-13 
5-i6 

5-02 

5.06 

4.92 
4-95 

4.82 
4.85 

164 

5-40 

5.30 

5-20 

5.09 

4-99 

4.88 

165 

5-44 

5-33 

5-23 

5.13 

5.02 

4.92 

166 

5.48 

5-37 

5-26 

5.16 

5-05 

4-95 

167 

5.5i 

5.4i 

5.30 

5.19 

5-09 

4.98 

1  68 

5-55 

5-44 

5-33 

5-23 

5-12 

5.01 

169 

5.58 

5.48 

5-37 

5.26 

5.15 

5.05 

170 

5.62 

5.5i 

540 

5.30 

5-19 

5.08 

171 

5-55 

5-44 

5-33 

5-22 

5.H 

172 

5-58 

5-47 

5-37 

5.26 

5-15 

173 

5-62 

5-51 

5-40 

5.29 

5-i8 

174 

5-66 

5-54 

5-43 

5.32 

5.21 

175 

5-69 

5.58 

5-47 

5.36 

5-25 

176 

5-73 

5.62 

5-50 

5-39 

5.28 

177 

5.76 

5-65 

5-54 

5-42 

5.3i 

5-20 

178 

5.8o 

5-69 

5-57 

5.46 

5-34 

5-23 

179 

5-84 

5-72 

5.6i 

5-49 

5.38 

5.26 

180 

5.87 

5.76 

5-64 

5-53 

541 

5.30 

SMITHSONIAN   TABLES. 


73 


TABLE   16. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B=B  <10"'-1). 

Top  argument:     Height  of  the  barometer  (B). 
Side  argument:     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE   BAROMETER  IN   INCHES. 

25.5 

25.0 

24.5 

24.O 

23.5 

23.0 

22.5 

22.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

(80 

5.87 

5-76 

5.64 

5-53 

5-41 

5-30 

181 

5-91 

5-79 

5-68 

5-56 

5-44 

5-33 

182 

5-94 

5.83 

5.71 

5-59 

5.48 

5.36 

183 

5.98 

5-86 

5-75 

5-63 

5.5i 

5-39 

184 

6.02 

5-9° 

5.78. 

5-66 

5-54 

5-43 

185 

5-93 

5-82 

5.7o 

5.58 

5.46 

186 

5-97 

5.85 

5-73 

5-6i 

5-49 

187 

6.01 

5.89 

5.77 

5-65 

5-53 

188 

6.04 

5.92 

5-8o 

5.68 

5-56 

189 

6.08 

5.96 

5.83 

5-7i 

5-59 

190 

6.11 

5.99 

5.87 

5-75 

5-62 

191 

6.15 

6.03 

5-90 

5.78 

5-66 

192 

6.18 

6.06 

5-94 

5.8i 

5.69 

193 

6.22 

6.10 

5-97 

5.85 

5-72 

194 

6.26 

6.13 

6.01 

5-88 

5.76 

195 

6.29 

6.17 

6.04 

5-91 

5-79 

196 
197 

6.36 

6.20 

6.24 

6.08 
6.ii 

5-95 
5.98 

5-82 
5-86 

5-70 

5-73 

198 

6.40 

6.27 

6.14 

6.02 

5-89 

5.76 

199 

6.44 

6.31 

6.18 

6.05 

5.92 

5-79 

200 

6.47 

6.34 

6.21 

6.08 

5.96 

5.83 

2OI 

6.5I 

6.38 

6.25 

6.12 

5-99 

5.86 

202 

6-55 

6.41 

6.28 

6.15 

6.02 

5.89 

203 

6.58 

6.45 

6.32 

6.19 

6.06 

5-92 

2O4 

6.62 

6.49 

6-35 

6.22 

6.09 

5.96 

205 

6.52 

6.39 

6.26 

6.12 

5-99 

206 

6.56 

6.42 

6.29 

6.16 

6.02 

207 

6-59 

6.46 

6.32 

6.  19 

6.06 

208 

6.63 

6.49 

6.36 

6.22 

6.09 

209 

6.66 

6-53 

6.39 

6.26 

6.12 

210 

6.70 

6.56 

6-43 

6.29 

6.15 

211 

6.74 

6.60 

6.46 

6.32 

6.19 

212 

6.77 

6.63 

6.50 

6.36 

6.22 

213 

6.81 

6.67 

6-53 

6.39 

6.25 

214 

6.84 

6.71 

6.57 

6.43 

6.29 

215 

6.88 

6.74 

6.60 

6.46 

6.32 

216 

6.92 

6.78 

6.63 

6.49 

6-35 

6.21 

217 

6-95 

6.81 

6.67 

6.53 

6-39 

6.24 

218 

6.99 

6.85 

6.70 

6.56 

6.42 

6.28 

219 

7-03 

6.88 

6-74 

6.60 

6-45 

6.3I 

220 

6.92 

6.77 

6.63 

649 

6-34 

221 

6-95 

6.81 

6.66 

6.52 

6.37 

222 

6.99 

6.84 

6.70 

6.55 

6.41 

223 

7.02 

6.88 

6.73 

6-59 

6.44 

224 

7.06 

6.91 

6.77 

6.62 

6.47 

225 

7.10 

6-95 

6.80 

6.65 

6.51 

SMITHSONIAN  TABLES. 


74 


REDUCTION    OF   THE    BAROMETER    TO 

ENGLISH    MEASURES. 

Bo-B  =-  B  dO^-D. 

Top  argument:     Height  of  the  barometer  (B). 
Side  argument : 


SEA 


TABLE 
LEVEL. 


16. 


Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER    IN   INCHES. 

24.0 

23.5 

23.0 

22.5 

22.0 

21.5 

21.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

225 

7.10 

6-95 

6.80 

6.65 

6.51 

226 

7.13 

6.98 

6.84 

6.69 

6-54 

227 

7.17 

7.02 

6.87 

6.72 

6-57 

228 

7.20 

7-05 

6.90 

6.75 

6.60 

229 

7-24 

7.09 

6.94 

6.79 

6.64 

230 

7.28 

7.12 

6.97 

6.82 

6.67 

231 

7-31 

7.16 

7.01 

6.86 

6.70 

232 

7-35 

7.20 

7.04 

6.89 

6.74 

233 

7.38 

7-23 

7.08 

6.92 

6.77 

234 

7.42 

7-27 

7.II 

6.96 

6.80 

235 

7.46 

7.30 

7.15 

6.99 

6.84 

6.68 

236 

7-49 

7-34 

7.18 

7.02 

6.87 

6.7I 

237 

7-53 

7-37 

7.22 

7.06 

6.90 

6.74 

238 

7.41 

7-25 

7.09 

6-93 

6.78 

• 

239 

7-44 

7.29 

7-13 

6.97 

6.81 

240 

7.48 

7-32 

7.16 

7.00 

6.84 

241 

7-5i 

7-35 

7.19 

7.04 

6.88 

242 

7-55 

7-39 

7-23 

7.07 

6.91 

243 

7-59 

7.42 

7.26 

7.10 

6.94 

244 

7.62 

7.46 

7-30 

7.14 

6.97 

245 

7.66 

7-49 

7-33 

7.17 

7.01 

246 

7.69 

7-53 

7-37 

7.20 

7.04 

247 

7-73 

7-57 

7.40 

7.24 

7.07 

248 

1-11 

7.60 

.7-44 

7.27 

7.10 

249 

7.80 

7.64 

7-47 

7-30 

7.14 

250 

7.84 

7-67 

7.50 

7-34 

7.17 

251 

7.87 

7.71 

7-54 

7-37 

7.20 

252 

7.91 

7-74 

7-57 

7.41 

7.24 

253 

7-95 

7.78 

7.61 

7-44 

7.27 

254 

7.98 

7.81 

7.64 

7-47 

7-30 

255 

8.02 

7.85 

7.68 

7-51 

7-34 

256 

8.05 

7.88 

7.71 

7-54 

7-37 

7.20 

257 

8.09 

7.92 

7-75 

7-57 

7.40 

7-23 

258 

8.13 

7-95 

7-78 

7.61 

7-44 

7.26 

259 

8.16 

7-99 

7.82 

7.64 

7-47 

7.30 

260 

8.03 

7.85 

7.68 

7.50 

7-33 

261 

8.06 

7.89 

7.71 

7-54 

7.36 

262 

8.10 

7.92 

7-75 

7-57 

7-39 

263 
264 

8.13 
8.17 

7.96 
7-99 

7.78 
7.81 

7.60 
7.64 

7-43 
7.46 

265 

266 

8.21 

8.24 

8.03 
8.06 

7-85 
7.88 

7.67 
7.70 

7-49 

7-52 

267 

8.28 

8.10 

7.92 

7-74 

7.56 

268 

8.31 

8.13 

7-95 

7-77 

7-59 

269 

8.35 

8.17 

7-99 

7.80 

7.62 

270 

8.39 

8.20 

8.02 

7.84 

7.66 

SMITHSONIAN  TABLES. 


TABLE  16. 

REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B  =  B  (10™-1). 

Top  argument:     Height  of  the  barometer  (B). 
Side  argument :     Values  of  2000  m  obtained   from  Table  14. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  INCHES. 

23.0 

22.5 

22.0 

21.5 

21.0 

20.5 

20.0 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

270 

8-39 

8.20 

8.02 

7.84 

7.66 

271 

8.42 

8.24 

8.06 

7.87 

7.69 

272 

8.4^ 

8.27 

8.09 

7.91 

7-72 

273 

8.49 

8.3I 

8.12 

7.94 

7.76 

274 

8-53 

8-34 

8.16 

7-97 

7-79 

275 

8.57 

8.38 

8.19 

8.01 

7.82 

276 

8.60 

8.42 

8.23 

8.04 

7.85 

277 

8-45 

8.26 

8.08 

7.89 

7.70 

278 

8.49 

8.30 

8.ii 

7.92 

7-73 

279 

8.52 

8-33 

8.14 

7-95 

7-77 

280 

8.56 

8.37 

8.18 

7-99 

7.80 

281 

8.59 

8.40 

8.21 

8.02 

7.83 

282 

8.63 

8.44 

8.25 

8.05 

7.86 

283 

8.67 

8.47 

8.28 

8.09 

7.90 

284 

8.70 

8.51 

8.32 

8.12 

7-93 

285 

8.74 

8.54 

8-35 

8.16 

7.96 

286 

8-77 

8.58 

8.38 

8.19 

7-99 

287 

8.81 

8.61 

8.42 

8.22 

8.03 

288 

8.85 

8.65 

8.45 

8.26 

8.06 

289 

8.88 

8.68 

8.49 

8.29 

8.09 

290 

8.92 

8.72 

8.52 

8.32 

8.13 

291 

8.95 

8.76 

8.56 

8.36 

8.16 

292 

8.99 

8.79 

8.59 

8.39 

8.19 

293 
294 

9-°3 
9.06 

8.83 
8.86 

8.63 
8.66 

8-43 
8.46 

8.22 
8.26 

295 

9.10 

8.90 

8.70 

8-49 

8.29 

8.09 

296 

9.14 

8-93 

8.73 

8-53 

8-32 

8.12 

297 

8.97 

8.76 

8.56 

8.36 

8.15 

298 

9.00 

8.80 

8.60 

8-39 

8.19 

299 

9.04 

8.83 

8.63 

8.42 

8.22 

300 

9.08 

8.87 

8.66 

8.46 

8.25 

301 

9.11 

8.90 

8.70 

8-49 

8.28 

302 

9-J5 

8.94 

8.73 

8.52 

8.32 

303 

9.18 

8.97 

8.77 

8.56 

8.35 

304 

9.22 

9.01 

8.80 

8-59 

8.38 

305 

9.26 

9.04 

8.83 

8.62 

8.41 

306 

9.29 

9.08 

8.87 

8.66 

8-45 

307 

9-33 

9.12 

8.90 

8.69 

8.48 

308 

9-36 

9-15 

8-94 

8.72 

8.51 

309 

9.40 

9.19 

8-97 

8.76 

8-54 

310 

9-44 

9.22 

9.01 

8-79 

8.58 

3ii 

9-47 

9.26 

9.04 

8.83 

8.61 

312 

9-5i 

9.29 

9.08 

8.86 

8.64 

313 

9-54 

9-33 

9.11 

8.89 

8.68 

3i4 

9.58 

9-36 

9-15 

8.93 

8.71 

315 

9.62 

9.40 

9.18 

8.96 

8.74 

SMITHSONIAN  TABLES. 


TABLE  16, 
REDUCTION    OF   THE     BAROMETER    TO    SEA    LEVEL. 

ENGLISH    MEASURES. 

Bo-B  =  B  (10W-1). 

Top   argument:     Height  of  the  barometer  (B). 
Side  argument :     Values  of  2000  m  obtained  from  Table  14. 


2000  m. 

HEIGHT  OF  THE   BAROMETER   IN  INCHES. 

22.0 

21.5 

21.0 

20.5 

20.0 

19.5 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

3I5 

9.62 

9.40 

9.18 

8.96 

8-74 

8-52 

3i6 

9-65 

9-43 

9.21 

9.00 

8.78 

8.56 

317 

9.69 

9-47 

9-25 

9-°3 

8.81 

8-59 

3i8 

9-73 

9-5i 

9.28 

9.06 

8.84 

8.62 

319 

9.76 

.  9-54 

9-32 

9.10 

8.88 

8.65 

320 

9.80 

9.58 

9-35 

9-13 

8.91 

8.69 

321 

9.61 

9-39 

9.17 

8.94 

8.72 

322 

9-65 

9.42 

9.20 

8.98 

•  8.75 

323 

9.68 

9.46 

9-23 

9.01 

8.78 

324 

9.72 

9-49 

9.27 

9.04 

8.82 

325 

9.76 

9-53 

9-30 

9.08 

8.85 

326 

9-79 

9-56 

9-34 

9.11 

8.88 

327 

9-83 

9.60 

9-37 

9.14 

8.91 

328 

9.86 

9.64 

9.41 

9.18 

8-95 

329 

9.90 

9.67 

9-44 

9.21 

8.98 

330 

9.94 

9.71 

9-47 

9.24 

9.01 

331 

9-97 

9-74 

9-5i 

9.28 

9-05 

332 

10.01 

9.78 

9-54 

9-3i 

9.08 

333 

10.05 

9.81 

9.58 

9-34 

9.11 

334 

9-85 

9.61 

9.14 

SMITHSONIAN  TABLES. 


/7 


TABLE   17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i—  /8) 


Values  of   2000  X  m. 


1 8444+67. 530+.  oo3Z 


Altitude  in 
metres. 

Z. 

MEAN  TEMPERATURE  OF  AIR   COLUMN    IN   CENTIGRADE   DEGREES   (0). 

—  16° 

-12° 

-8° 

-4° 

-2° 

0° 

_|_20 

+  4° 

+  6° 

+  8° 

4  10° 

10 

1.2 

i.i 

i.i 

i.i 

i.i 

i.i 

I.I 

i.i 

i.i 

I.O 

I.O 

20 

2-3 

2-3 

2.2 

2.2 

2.2 

2.2 

2.1 

2.1 

2.1 

2.1 

2.1 

3° 

3-5 

3-4 

3-3 

3-3 

3-3 

3.2 

3-2 

3-2 

3.2 

3-i 

3-i 

40 

4.6 

4-5 

4-5 

4.4 

4.4 

4-3 

4-3 

4-3 

4.2 

4.2 

4.2 

50 

5-8 

5-7 

5-6 

5-5 

5-5 

5-4 

5-4 

5-3 

5-3 

5-2 

5-2 

60 

6.9 

6.8 

6-7 

6.6 

6-5 

6-5 

6-4 

6.4 

6.3 

6.3 

6.2 

70 

8.1 

7-9 

7.8 

7-7 

7-6 

7.6 

7.5 

7-5 

7-4 

7.3 

7-3 

80 

9.2 

9-i 

8.9 

8.8 

8.7 

8.7 

8.6 

8-5 

8-5 

8.4 

8-3 

90 

10.4 

10.2 

IO.O 

9-9 

9.8 

9.7 

9-7 

9.6 

9-5 

9-4 

9-4  ( 

100 

n-5 

ii-3 

II.  2 

II.  0 

10.9 

10.8 

10.7 

10.7 

10.6 

10.5 

10.4 

no 

12.7 

12.5 

12.3 

12.  1 

12.0 

11.9 

n.8 

11.7 

n.6 

ii.  5 

11.4 

120 

13^8 

13-6 

13-4 

13.2 

I3-I 

13.0 

12.9 

12.8 

12.7 

12.6 

12.5   i 

130 

15.0 

14.7 

14-5 

14.3 

14.2 

14.1 

14.0 

13-9 

13-7 

13.6 

13.5   i 

140 

16.1 

!5-9 

15-6 

15.4 

15.3 

15-1 

15.0 

14.9 

14.8 

14.7 

14.6  ; 

150 

17-3 

17.0 

16.7 

16.5 

16.4 

16.2 

16.1 

16.0 

15-9 

15-7 

15.6 

160 

18.4 

18.1 

I7.8 

17.6 

17.4 

17-3 

17.2 

17.0 

16.9 

16.8 

16.7 

170 

19.6 

19-3 

19.0 

18.7 

I8.5 

18.4 

18.3 

18.1 

18.0 

17.8 

17.7 

1  80 

20.7 

20.4 

20.1 

19.8 

19.6 

19-5 

19.3 

19.2 

19.0 

18.9 

18.7 

190 

21.9 

21.5 

21.2 

20.9 

20.7 

20.6 

20.4 

20.2 

20.1 

19.9 

19.8 

200 

23.0 

22.7 

22.3 

22.0 

21.8 

21.6 

21.5 

21-3 

21.  1 

21.0 

20.8    1 

210 

24.2 

23.8 

23-4 

23.1 

22.9 

22.7 

22.6 

22.4 

22.2 

22.0 

21.9 

220 

25-3 

24.9 

24-5 

24.2 

24.0 

23.8 

23.6 

23.4 

23-3 

23-1 

22.9 

230 

26.5 

26.1 

25-7 

25-3 

25.1 

24.9 

24.7 

24.5 

24.3 

24.1 

23.9 

240 

27.6 

27.2 

26.8 

26.4 

26.2 

26.0 

25.8 

25.6 

25-4 

25-2 

25.0 

250 

28.8 

28.3 

27.9 

27-5 

27.3 

27.0 

26.8 

26.6 

26.4 

26.2 

26.0 

260 

29.9 

29-5 

29.0 

28.6 

28.3 

28.1 

27.9 

27-7 

27.5 

27.3 

27.1 

270 

3i-i 

30.6 

30.1 

29.7 

29.4 

29.2 

29.0 

28.8 

28.5 

28.3 

28.1 

280 

32.2 

31-7 

31.2 

30.8 

30.5 

30.3 

30.1 

29.8 

29.6 

29.4 

29.1 

290 

33-4 

32-9 

32.4 

31-9 

31.6 

31.4 

3I.I 

30-9 

30.7 

30-4 

30.2 

300 

34-5 

34-  ° 

33-5 

33-0 

32.7 

32.5 

32.2 

32.0 

31.7 

3L5 

31.2 

310 

35-7 

35-i 

34-6 

34-1 

33-8 

33.5 

33-3 

33-° 

32-8 

32.5 

32.3 

320 

36.8 

36.3 

35-7 

35-2 

34-9 

34.6 

34-4 

34-  1 

33-8 

33-6 

33.3 

330 

38.0 

374 

36.8 

36.3 

36.0 

35.7 

35-4 

35-2 

34-9 

34-6 

34.3 

340 

39-  i 

38.5 

37-9 

37-4 

37-1 

36.8 

36.5 

36.2 

35-9 

35-7 

35.4 

350 

40.3 

39-7 

39-  o 

38.5 

38.2 

37.9 

37.6 

37-3 

37-0 

36.7 

36.4 

360 

41.4 

40.8 

40.2 

39-5 

39-2 

38.9 

38.6 

38.4 

38.1 

37-8 

37-5 

370 

42.6 

41.9 

41-3 

40.6 

40-3 

40.0 

39-7 

39-4 

39-1 

38.8 

38.5 

380 

43-7 

43-i 

42.4 

41.7 

41.4 

41.1 

40.8 

40.5 

40.2 

39-9 

39-6 

39° 

44-9 

44-2 

43-5 

42.8 

42-5 

42.2 

41.9 

4L5 

41.2 

40.9 

40.6 

400 

46.0 

45-3 

44.6 

43.9 

43-6 

43.3 

42.9 

42.6 

42.3 

42.0 

41.6 

410 

47-2 

46.4 

45-7 

45.o 

44-7 

44'.  4 

44.0 

43-7 

43-3 

43-o 

42-7 

420 

48.3 

47.6 

46.9 

46.1 

45-8 

45-4 

45.1 

44-7 

44-4 

44.1 

43-7 

430 

49-5 

48.7 

48.0 

47.2 

46.9 

46.5 

46.2 

45-8 

45-5 

45-1 

44.8 

440 

50.6 

49.8 

49.1 

48.3 

48.0 

47.6 

47-2 

46.9 

46.5 

46.2 

45.8 

450 

51-8 

51.0 

50.2 

49-4 

49.1 

48.7 

48.3 

47-9 

47.6 

47.2 

46.8 

460 

52-9 

52.1 

5i.3 

50-5 

50.1 

49.8 

49-4 

49.0 

48.6 

48.2 

47-9 

470 

54-1 

53-2 

52.4 

5L6 

51-2 

50.8 

50.5 

50.1 

49-7 

49-3 

48.9 

480 

55-2 

54-4 

53-5 

52.7 

52.3 

5L9 

51-5 

51-1 

50-7 

50.3 

50.0 

49° 

5M 

55-5 

54-7 

53.8 

53.4 

53.o 

52.6 

52.2 

51-8 

5L4 

51-0 

500 

57-5 

56.6 

55-8 

54-9 

54-5 

54-1 

53-7 

53-3 

52-9 

52.4 

52.0 

SMITHSONIAN  TABLES. 


TABLE    17. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Values  of  2000  X  m. 


18444+67. 536+ .oo3Z 


Altitude  in 
metres. 

Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES  (Q). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  38° 

10 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

I.O 

0.9 

20 

2.1 

2.1 

2.0 

2.O 

2.O 

2.0 

2.O 

2.O 

i-9 

i-9 

1.9 

30 

3-i 

3-i 

3-i 

3-o 

3-0 

3-0 

3.0 

2-9 

2.9 

2.9 

2.8 

40 

4.1 

4.1 

4.1 

4.0 

4.0 

4.0 

3-9 

3-9 

3-9 

3-8 

3-8 

50 

5-2 

5-1 

5-i 

5.0 

5-0 

5-o 

4.9 

4-9 

4-9 

4.8 

4-7 

60 

6.2 

6.2 

6.1 

6.1 

6.0 

6.0 

5.9 

5-9 

5.8 

5-8 

5-7 

70 

7.2 

7.2 

7-1 

7-i 

7.0 

7.0 

6.9 

6-9 

6.8 

6-7 

6.6 

80 

8.3 

8.2 

8.1 

8.1 

8.0 

8.0 

7-9 

7-8 

7-8 

7.7 

7.6 

90 

9-3 

9-2 

9.2 

9.1 

9.0 

9.0 

8.9 

8.8 

8.8 

8.6 

8.5 

IOO 

10.3 

10.3 

10.2 

10.  1 

10.  0 

9-9 

9-9 

9.8 

9-7 

9-6 

9-5 

110 

11.4 

ii-3 

II.  2 

ii.  i 

II.  0 

10.9 

10.9 

10.8 

10.7 

10.5 

10.4 

120 

12.4 

12.3 

12.2 

12.  1 

12.0 

11.9 

11.  8 

ii.  8 

ii.  7 

H-5 

"•3 

I30 

13-4 

13-3 

13.2 

I3.I 

13.0 

12.9 

12.8 

12.7 

12.7 

12.5 

12.3 

140 

14.5 

14-3 

14.2 

14.1 

14.0 

13-9 

13.8 

13.7 

13-6 

134 

13.2 

150 

15-5 

15-4 

15-3 

I5-I 

15.0 

14.9 

14.8 

14-7 

14.6 

14.4 

14.2 

160 

16.5 

16.4 

I6.3 

16.2 

16.0 

15-9 

15-8 

15.7 

15-6 

J5-3 

15-1 

170 

I7.6 

17.4 

17-3 

17.2 

17.0 

16.9 

16.8 

16.7 

16.5 

16.3 

16.1 

1  80 

18.6 

18.4 

I8.3 

18.2 

18.0 

17.9 

17.8 

17.6 

17.5 

17-3 

17.0 

190 

19.6 

19-5 

19-3 

19.2 

19.0 

18.9 

18.8 

18.6 

18.5 

18.2 

1  8.0   : 

200 

20.7 

20.5 

20.3 

20.2 

20.  o 

19.9 

19.7 

19.6 

19-5 

19.2 

18.9   i 

210 

21.7 

21.5 

21.4 

21.2 

21.0 

20.9 

20.7 

20.  6 

20.4 

20.1 

19.8 

220 

22.7 

22.5 

22.4 

22.2 

22.0 

21.9 

21.7 

21.6 

21.4 

21.  1 

20.8 

230 

23-8 

23.6 

23.4 

23.2 

23.0 

22.9 

22.7 

22.5 

22.4 

22.  0 

21.7 

240 

24.8 

24.6 

24.4 

24.2 

24.0 

23-9 

23.7 

23-5 

23-3 

23.0 

22.7 

250 

25-8 

25.6 

25.4 

25.2 

25.0 

24.9 

24.7 

24-5 

24.3 

24.0 

23.6 

260 

26.9 

26.6 

26.4 

26.2 

26.1 

25-9 

25-7 

25-5 

25-3 

24.9 

24.6 

270 

27.9 

27.7 

27.5 

27-3 

27.1 

26.9 

26.7 

26.5 

26.3 

25-9 

25.5 

280 

28.9 

28.7 

28.5 

28.3 

28.1 

27.8 

27.6 

27.4 

27.2 

26.8 

26.5 

290 

29.0 

29.7 

29.5 

29-3 

29.1 

28.8 

28.6 

28.4 

28.2 

27.8 

27.4 

300 

31.0 

30.7 

30.5 

30-3 

3O.I 

29.8 

29.6 

29-4 

29.2 

28.8 

28.4 

310 

32.0 

3L8 

31.5 

31-3 

3LI 

30.8 

3°.  6 

3°-4 

30.2 

29.7 

29-3 

320 

33-1 

32-8 

32.6 

32.3 

32.1 

3L8 

31.6 

31.4 

3i-i 

30.7 

30.3 

330 

34-1 

33-8 

33.6 

33-3 

33-i 

32.8 

32.6 

32.3 

32.1 

31.6 

31.2 

34o 

35-1 

34-8 

34-6 

34-3 

34-1 

33-8 

33.6 

33-3 

33-i 

32-6 

32.1 

35o 

36.2 

35-9 

35-6 

35-3 

35.i 

34-8 

34-6 

34-3 

34-0 

33-5 

33-1 

360 

37-2 

36.9 

36.6 

36.3 

36-1 

35.8 

35-5 

35-3 

35-0 

34-5 

34-0 

370 

38.2 

37-9 

37-6 

37-4 

37.i 

36.8 

36.5 

36.3 

36.0 

35-5 

35-0 

380 

39-2 

38.9 

38.7 

38.4 

38-1 

37-8 

37-5 

37.2 

37.o 

36.4 

35-9 

39° 

40.3 

40.0 

39-7 

39-4 

39-i 

38.8 

38.5 

38-2 

37-9 

37.4 

36.9 

400 

41-3 

41.0 

40.7 

40.4 

40.1 

39-8 

39-5 

39-2 

38.9 

38.3 

37-8 

410 

42.3 

42.0 

41.7 

41.4 

41.1 

40.8 

40.5 

40.2 

39-9 

39-3 

38.7 

420 

43-4 

43-0 

42.7 

42.4 

42.1 

41.8 

41-5 

41.2 

40.8 

40-3 

39-7 

430 

44.4 

44.1 

43-7 

43-4 

43-i 

42.8 

42.4 

42.1 

41.8 

41.2 

40.6 

440 

45-4 

45.1 

44-8 

44.4 

44.1 

43-8 

43-4 

43-1 

42.8 

42.2 

41.6 

450 

46.5 

46.1 

45-8 

45-4 

45-1 

44-8 

44.4 

44-1 

43.8 

43-1 

42.5 

460 

47-5 

47.1 

46.8 

46.4 

46.1 

45-7 

45-4 

45-i 

44-7 

44  T 

43-5 

470 

48.5 

48.2 

47.8 

47-4 

47.1 

46.7 

46.4 

46.1 

45-7 

45-o 

44.4 

480 

49.6 

49.2 

48.8 

48.5 

48.1 

47-7 

47-4 

47.0 

46.7 

46.0 

45-4 

490 

50.6 

50.2 

49-8 

49-5 

49.1 

48.7 

48.4 

48.0 

47-6 

47.0 

46.3 

500 

51.6 

51-2 

50.9 

50.5 

50.1 

49-7 

49-4 

49.0 

48.6 

47-9 

47.2 

BMITHSONIAn    TABLES 


7Q 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Values  of  2OOO  X  m. 


1 8444+67. 550+.  oc>3Z 


Altitude 
in 
metres. 
2. 

MEAN  TEMPERATURE  OF  AIR   COLUMN   IN   CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

4-4° 

+  6° 

+  8° 

+  10° 

500 

57-5 

56.6 

55-8 

54.9 

54-5 

54-1 

53-7 

53-3 

52.9 

524 

52.0 

5io 

58.7 

57.8 

56.9 

56.0 

55-6 

55.2 

54-8 

54-3 

53.9 

53-5 

53-i 

520 

59-8 

58.9 

58.0 

57-1 

56.7 

56.3 

55.8 

554 

55-0 

54-5 

54-1 

530 

61.0 

60.0 

59-i 

58.2 

57-8 

57-3 

56.9 

56.5 

56.0 

55-6 

55-2 

540 

62.1 

61.2 

60.2 

59-3 

58.9 

58.4 

58.0 

57-5 

57-1 

56.6 

56.2 

550 

63.3 

62.3 

61.4 

60.4 

60.0 

59-5 

59-° 

58.6 

58.1 

57.7 

57-2 

560 

64.4 

634 

62.5 

61.5 

61.1 

60.6 

60.1 

59-7 

59-2 

58.7 

58.3 

570 

65.6 

64.6 

63.6 

62.6 

62.1 

61.7 

6l.2 

60.7 

60.3 

59-8 

59-3 

580 

66.7 

65.7 

64.7 

63.7 

63-2 

62.7 

62.3 

61.8 

61.3 

60.8 

60.4 

590 

67.9 

66.8 

65.8 

64.8 

64-3 

63.8 

63-3 

62.9 

62.4 

61.9 

61.4 

600 

69.0 

68.0 

66.9 

65-9 

654 

64-9 

644 

63-9 

634 

62.9 

62.4 

610 

70.2 

69.1 

68.0 

67.0 

66.5 

66.0 

65.5 

65.0 

64.5 

64.0 

63-5 

620 

71.4 

70.2 

69.2 

68.1 

67.6 

67.1 

66.6 

66.0 

65.5 

65.0 

64-5 

630 

72.5 

71.4 

70.3 

69.2 

68.7 

68.2 

67.6 

67.1 

66.6 

66.1 

65-6 

640 

73-7 

72.5 

71.4 

70.3 

69.8 

69.2 

68.7 

68.2 

67.7 

67.1 

66.6 

650 

74-8 

73.6 

72.5 

71.4 

70.9 

70.3 

69.8 

69.2 

68.7 

68.2 

67.6 

660 

76.0 

74-8 

73-6 

72.5 

72.0 

71.4 

70.9 

70.3 

69.8 

69.2 

68.7 

670 

77-1 

75.9 

74-7 

73-6 

73-0 

72:5 

71.9 

71.4 

70.8 

70.3 

69.7 

680 

78.3 

77.o 

75-9 

74-7 

74.1 

73.6 

73-0 

72.4 

71.9 

71-3 

70.8 

690 

794 

78.2 

77.0 

75-8 

75-2 

74-6 

74.1 

73-5 

72.9 

72.4 

71.8 

700 

80.6 

79-3 

78.1 

76.9 

76.3 

75-7 

75-1 

74.6 

74.0 

734 

72.9 

710 

81.7 

80.4 

79.2 

78.0 

77-4 

76.8 

76.2 

75-6 

75.1 

74.5 

73-9 

720 

82.9 

81.6 

80.3 

79.1 

78.5 

77-9 

77-3 

76.7 

76.1 

75-5 

74-9 

73° 

83.0 

82.7 

81.4 

80.2 

79-6 

79.0 

78.4 

77-8 

77.2 

76.6 

76.0 

740 

85.2 

83.8 

82.5 

81.3 

80.7 

80.1 

79-4 

78.8 

78.2 

77-6 

77.o 

750 

86.3 

85.0 

83.7 

82.4 

81.8 

81.1 

80.5 

79-9 

79-3 

78.7 

78.1 

760 

87.5 

86.1 

84.8 

83.5 

82.9 

82.2 

81.6 

81.0 

80.3 

79-7 

79.1 

770 

88.6 

87.2 

85-9 

84.6 

83.9 

83-3 

82.7 

82.0 

81.4 

80.8 

80.1 

780 

89.8 

88.4 

87.0 

85.7 

85.0 

84.4 

837 

83.1 

82.5 

81.8 

81.2 

790 

90.9 

89.5 

88.1 

86.8 

86.1 

85.5 

84.8 

84.2 

83.5 

82.9 

82.2 

800 

92.1 

90.6 

89.2 

87.9 

87.2 

86.5 

85-9 

85.2 

84.6 

83-9 

83.3 

810 

93-2 

91.8 

90.4 

89.0 

88.3 

87.6 

87.0 

86.3 

85-6 

85.0 

84.3 

820 

94-4 

92.9 

9T-5 

90.1 

89.4 

88.7 

88.0 

87.4 

86.7 

86.0 

85.3 

830 

95-5 

94.0 

92.6 

91.2 

90.5 

89.8 

89.1 

88.4 

87.7 

87.1 

86.4 

840 

96.7 

95-2 

93-7 

92.3 

91.6 

90.9 

90.2 

89-5 

88.8 

88.1 

87.4 

850 

97-8 

96.3 

94-8 

93-4 

92.7 

92.0 

91.2 

90.5 

89.8 

89.2 

88.5 

860 

99.0 

974 

95-9 

94.5 

93-8 

93-0 

92-3 

91.6 

90.9 

90.2 

89-5 

870 

IOO.I 

98.6 

97.0 

95-6 

94-8 

94.1 

934 

92.7 

92.0 

9L3 

90.5 

880 

101.3 

99-7 

98.2 

96.7 

95-9 

95-2 

94-5 

93-7 

93-0 

92-3 

91.6 

890 

102.4 

100.8 

99-3 

97-8 

97.0 

96.3 

95-5 

94.8 

94-1 

93-3 

92.6 

900 

103.6 

IO2.O 

100.4 

98.9 

98.1 

974 

96.6 

95-9 

95-1 

944 

93-7 

910 

104.7 

I03.I 

101.5 

100.0 

99.2 

98.4 

97-7 

96.9 

96.2 

954 

94-7 

920 

105.9 

104.2 

102.6 

IOI.I 

100.3 

99-5 

98.8 

98.0 

97-2 

96.5 

957 

930 

107.0 

1054 

103.7 

102.2 

101.4 

100.6 

99.8 

99.1 

98.3 

97-5 

96.8 

940 

108.2 

106.5 

104.9 

103.3 

102.5 

101.7 

100.9 

IOO.I 

994 

98.6 

97-8 

950 

109.3 

107.6 

106.0 

1044 

103.6 

102.8 

102.0 

IOI.2 

100.4 

99.6 

98.9 

960 

110.5 

108.8 

107.1 

105.5 

104.7 

103.9 

I03.I 

102.3 

101.5 

100.7 

99-9 

970 

1  1  1.6 

109.9 

108.2 

106.6 

105.7 

104.9 

I04.I 

103.3 

102.5 

101.7 

100.9 

980 

1  12.8 

III.O 

109.3 

IO7.6 

106.8 

106.0 

105.2 

1044 

103.6 

102.8 

IO2.O 

990 

II3-9 

112.  1 

110.4 

108.7 

107.9 

107.1 

106.3 

105-5 

104.6 

103.8 

103.0 

!  1000 

115.1 

II3-3 

111.5 

109.8 

109.0 

108.2 

107.3 

106.5 

105.7 

104.9 

I04.I 

SMITHSONIAN  TABLES. 


So 


TABLE  17 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Values  of  2OOO  X  m. 


1 8444+67. 536+ .oo3Z 


Altitude 
in 
metres, 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0}. 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

500 

51-6 

51-2 

50-9 

50-5 

50.1 

49-7 

494 

49-o 

48.6 

47-9 

47-2 

5io 

52.7 

52-3 

5i.9 

51-5 

5i.i 

50.7 

50.3 

50.0 

49.6 

48.9 

48.2 

520 

53-7 

53-3 

52.9 

52.5 

52.1 

5L7 

5i.3 

51-0 

50.6 

49.8 

49.1 

530 

54-7 

54-3 

53-9 

53-5 

53.i 

52.7 

52-3 

51.9 

5L5 

50.8 

50.1 

540 

55-8 

55-3 

54-9 

54-5 

54-1 

53-7 

53.3 

52-9 

52.5 

51-8 

51-0 

550 

56.8 

56.4 

55.9 

55-5 

55-1 

54-7 

54-3 

53-9 

53-5 

52.7 

52.0 

560 

57-8 

574 

57-0 

56.5 

56.1 

55-7 

55-3 

54.9 

544 

53.7 

52.9  ! 

570 

58.9 

584 

58.0 

57-5 

57-1 

56.7 

56-3 

55-8 

554 

54-6 

53-9  i 

580 

59-9 

594 

59-0 

58.5 

58.1 

57-7 

57-2 

56.8 

564 

55-6 

54.8 

59° 

60.9 

60.5 

60.0 

59-6 

59-i 

58.7 

58.2 

57-8 

574 

56.5 

55-7 

600 

62.0 

61.5 

61.0 

60.6 

60.1 

59-7 

59-2 

58.8 

58.3 

57-5 

56.7 

610 

63.0 

62.5 

62.0 

61.6 

61.1 

60.7 

60.2 

59-8 

59-3 

58.5 

57.6 

620 

64.0 

63.5 

63.1 

62.6 

62.1 

61.7 

61.2 

60.7 

60.3 

594 

58.6  j 

630 

65.1 

64.6 

64.1 

63.6 

63.1 

62.6 

62.2 

61.7 

61.3 

60.4 

59-5  '• 

640 

66.1 

65.6 

65.1 

64.6 

64.1 

63.6 

63-2 

62.7 

62.2 

61.3 

60.5 

650 

67.1 

66.6 

66.1 

65.6 

65.1 

64.6 

64.2 

63-7 

63.2 

62.3 

61.4 

660 

68.2 

67.6 

67.1 

66.6 

66.1 

65.6 

65-1 

64.7 

64.2 

63.3 

62.4 

670 

69.2 

68.7 

68.1 

67.6 

67.1 

66.6 

66.1 

65-6 

65.1 

64.2  !    63.3  i 

680 

70.2 

69.7 

69.2 

68.6 

68.1 

67.6 

67-1 

66.6 

66.1 

65.2      64.2 

690 

71-3 

70.7 

70.2 

69.6 

69.1 

68.6 

68.1 

67.6 

67.1 

66.1 

65.2 

700 

72.3 

71.7 

71.2 

70.7 

70.1 

69.6 

69.1 

68.6 

68.1 

67.1 

66.1  : 

710 

73-3 

72.8 

72.2 

71.7 

71.1 

70.6 

70.1 

69.6 

69.0 

68.0 

67.1 

720 

74-4 

73-8 

73-2 

72.7 

72.1 

71.6 

71.1 

70.5 

70.0 

69.0 

68.0 

730 

754 

74.8 

74-2 

73-7 

73-1 

72.6 

72.0 

71-5 

71.0 

70.0 

69.0 

74o 

76.4 

75-8 

75-3 

74-7 

74.1 

73-6 

73-0 

72-5 

72.0 

70.9 

69.9 

750 

77-5 

76.9 

76.3 

75-7 

75.i 

74.6 

74-0 

73.5 

72.9 

71.9 

70.9 

760 

78.5 

77-9 

77-3 

76.7 

76.1 

75-6 

75-0 

74.5 

73-9 

72.8 

71.8 

770 

79-5 

78.9 

78.3 

77-7 

77.1 

76.6 

76.0 

754 

74.9 

73.8 

72.8 

780 

80.6 

79-9 

79-3 

78.7 

78.1 

77-6 

77.0 

76.4 

75-9 

74.8 

73-7 

790 

81.6 

81.0 

80.3 

79-7 

79.1 

78.6 

.  78.0 

774 

76.8 

75.7 

74.6 

800 

82.6 

82.0 

81.4 

80.8 

80.  i 

79.6 

79.0 

78.4 

77-8 

76.7 

75-6 

810 

83-7 

83.0 

82.4 

81.8 

81.2 

80.5 

79-9 

794 

78.8 

77.6 

76.5 

820 

84-7 

84.0 

834 

82.8 

82.2 

81.5 

80.9 

80.3 

79-7 

78.6 

77.5 

830 

85-7 

85-1 

844 

83.8 

83-2 

82.5 

81.9 

81.3 

80.7 

79-5 

78.4 

840 

86.8 

86.1 

854 

84.8 

84.2 

83.5 

82.9 

82.3 

81.7 

80.5 

794 

850 

87.8 

87.1 

86.4 

85.8 

85.2 

84.5 

83-9 

83.3 

82.7 

81.5 

80.3 

860 

88.8 

88.1 

87.5 

86.8 

86.2 

85.5 

84.9 

84-3 

83.6 

82.4 

81.3 

870 

89.9 

89.2 

88.5 

87.8 

87.2 

86.5 

85-9 

85-2 

84.6 

834 

82.2 

880 

90.9 

90.2 

89-5 

88.8 

88.2 

87.5 

86.9 

86.2 

85-6 

84-3 

83-1 

890 

91.9 

91.2 

90.5 

89.8 

89.2 

88.5 

87.8 

87.2 

86.6 

85.3 

84.1 

900 

93-o 

92.2 

9i-5 

90.8 

90.2 

89-5 

88.8 

88.2 

87-5 

86.3 

85.0 

910 

94.0 

93-3 

92.6 

91.9 

91.2 

9°-5 

89.8 

89.2 

88.5 

87.2 

86.0 

920 

95-0 

94-3 

93-6 

92.9 

92.2 

9*-5 

90.8 

90.1 

89-5 

88.2 

86.9 

930 

96.0 

95-3 

94.6 

93-9 

93-2 

92.5 

91.8 

91.1 

9°4 

89.1 

87.9 

940 

97.1 

96.3 

95-6 

94-9 

94-2 

93-5 

92.8 

92.1 

91.4 

90.1 

88.8 

950 

98.1 

974 

96.6 

95-9 

95-2 

94-5 

93.8 

93-i 

924 

91.1 

89.8 

960 

99.1 

98.4 

97.6 

96.9 

96.2 

95-5 

94-8 

94-1 

934 

92.0 

90.7  ! 

970 

IOO.2 

994 

98.7 

97.9 

97-2 

96.5 

95-7 

95-0 

94-3 

93-o 

91.6 

980 

IOI.2 

100.4 

99.7 

98.9 

98.2 

974 

96.7 

96.0 

95-3 

93-9 

92.6 

990 

102.2 

101.5 

100.7 

99-9 

99-2 

98.4 

97-7 

97.0 

96.3 

94-9 

93-5 

1000 

103.3 

102.5 

101.7 

100.9 

100.2 

994 

98.7 

98.0 

97-3 

95-9 

94-5 

SMITHSONIAN  TABLES. 


TABLE   17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Values   of    2000  X  m. 


184^4+67. 530+.003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN   CENTIGRADE   DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

1000 

115.1 

II3-3 

111.5 

109.8 

109,0 

108.2 

107.3 

106.5 

105.7 

104.9 

104.1 

IOIO 

116.2 

114.4 

112.7 

110.9 

IIO.I 

109.3 

108.4 

107.6 

106.8 

105-9 

105.1 

IO2O 

117.4 

II5-5 

113.8 

II2.0 

III.  2 

110.3 

109-5 

108.7 

107.8 

107.0 

1  06.  2 

1030 

118.5 

116.7 

114.9 

II3-I 

II2.3 

111.4 

1  10.6 

109.7 

108.9 

108.0 

107.2 

1040 

119.7 

117.8 

116.0 

II4.2 

II3-4 

112.5 

1  1  1.6 

1  10.8 

109.9 

109.1 

108.2 

1050 

120.8 

118.9 

117.1 

H5.3 

II4-5 

113.6 

112.7 

iii.8 

III.O 

IIO.I 

109.3 

1060 

I22.O 

1  20.  i 

118.2 

II6.4 

II5.6 

114.7 

113.8 

112.9 

II2.0 

III.  2 

110.3 

1070 

I23.T 

121.  2 

II9-3 

U7.5 

II6.6 

II5-7 

114.9 

114.0 

II3.I 

II2.2 

111.4 

1080 

124.3 

122.3 

120.5 

II8.6 

II7.7 

116.8 

H5.9 

115.0 

II4.2 

II3-3 

112.4 

1090 

1254 

123-5 

I2I.6 

II9.7 

II8.8 

117.9 

117.0 

116.1 

II5.2 

II4-3 

113.4 

MOO 

126.6 

124.6 

122.7 

120.8 

II9.9 

119.0 

118.1 

117.2 

II6.3 

1154 

114.5 

I  IIO 

127.7 

125.7 

123.8 

121.9 

I2I.O 

I2O.I 

119.2 

118.2 

H7.3 

Il6.4 

115.5 

II2O 

128.9 

126.9 

124.9 

123.0 

122.  1 

121.  2 

1  20.  2 

II9-3 

II8.4 

H7.5 

116.6 

1130 

130.0 

128.0 

126.0 

124.1 

123.2 

122.2 

I2I.3 

120.4 

1194 

H8.5 

117.6 

1140 

I3I.2 

I29.I 

127.2 

125.2 

124.3 

123.3 

122.4 

121.4 

120.5 

II9.6 

118.6 

1150 

132.3 

I30-3 

128.3 

126.3 

1254 

1244 

1234 

122.5 

I2I.6 

120.6 

119.7 

1160 

133-5 

i3M 

129.4 

127.4 

126.4 

125.5 

124-5 

123.6 

122.6 

121.7 

120.7 

1170 

134.6 

132.5 

130.5 

128.5 

127.5 

126.6 

125-6 

124.6 

123.7 

122.7 

I2I.8 

1180 

135-8 

133-7 

131.6 

129.6 

128.6 

127.6 

126.7 

125.7 

124.7 

123.8 

122.8 

1190 

136.9 

134.8 

132.7 

130.7 

129.7 

128.7 

127.7 

126.8 

125.8 

124.8 

123.8 

1200 

I38.I 

135-9 

133.8 

131.8 

130.8 

129.8 

128.8 

127.8 

126.8 

125.9 

124.9 

1210 

139.2 

I37-I 

135.0 

132.9 

I3I-9 

130.9 

129.9 

128.9 

127.9 

126.9 

125.9 

1220 

140.4 

138.2 

136.1 

134.0 

i33.o 

132.0 

I3I.O 

130.0 

129.0 

128.0 

I27.O 

1230 

I4I.5 

139-3 

137.2 

135.1 

I34-I 

I33.I 

132.0 

131.0 

130.0 

129.0 

128.0 

1240 

142.7 

140.5 

138.3 

136.2 

135-2 

I34.I 

I33.I 

132.1 

I3I.I 

130.1 

129.0 

1250 

143-8 

141.6 

139.4 

137.3 

136.3 

135-2 

134-2 

133.1 

I32.I 

131.1 

I30.I 

1260 

145.0 

142.7 

140.5 

138.4 

137-3 

136.3 

135-3 

134.2 

133-2 

132.1 

I3I.I 

1270 

I46.I 

143-9 

141.7 

139-5 

138.4 

137-4 

136.3 

135.3 

134-2 

133.2 

132.2 

1280 

147-3 

145.0 

142.8 

140.6 

139-5 

138.5 

1374 

136.3 

135-3 

134.2 

T33.2 

1290 

148.4 

146.1 

143.9 

141.7 

140.6 

139-5 

138.5 

137.4 

136.3 

135.3 

134.2 

1300 

149.6 

147.3 

145.0 

142.8 

141.7 

140.6 

139-5 

138.5 

1374 

136.3 

135.3 

1310 

I50.7 

148.4 

146.1 

143-9 

142.8 

I4I.7 

140.6 

139-5 

138.5 

137.4 

136.3 

1320 

I5I.9 

149-5 

147.2 

145.0 

143-9 

142.8 

I4I.7 

140.6 

139.5 

138.4 

1374 

!33o 

153-0 

150.7 

148.3 

146.1 

145.0 

143.9 

142.8 

141.7 

140.6 

139-5 

138.4 

J340 

154.2 

151.8 

149-5 

147.2 

146.1 

145.0 

I43.8 

142.7 

I4I.6 

140.5 

!39-5 

1350 

155-3 

152-9 

150.6 

148.3 

147.2 

146.0 

144.9 

143.8 

142.7 

141.6 

140.5 

1360 

156.5 

I54-I 

151.7 

149.4 

148.2 

I47.I 

146.0 

144.9 

143-7 

142.6 

I4L5 

1370 

157.6 

155-2 

152.8 

150.5 

149-3 

148.2 

I47.I 

145.9 

144.8 

143.7 

142.6 

1380 

158.8 

156.3 

153.9 

151.6 

150.4 

149-3 

I48.I 

147.0 

145.9 

144.7 

143.6 

1390 

159-9 

157-5 

155.0 

152.7 

I5L5 

150.4 

149.2 

148.1 

146.9 

145.8 

144.7 

1400 

161.1 

158.6 

156.2 

153.8 

152.6 

I5I4 

150.3 

149.1 

148.0 

146.8 

145.7 

1410 

162.2 

159-7 

157.3 

154.9 

153-7 

152.5 

I5I-4 

150.2 

149.0 

147.9 

146.7 

1420 

163.4 

160.8 

158.4 

156.0 

154-8 

153-6 

152.4 

151.3 

I50.I 

148.9 

147.8 

1430 

164.5 

162.0 

159.5 

157.1 

155-9 

154.7 

153-5 

152.3 

I5LI 

150.0 

148.8 

1440 

165-7 

163.1 

160.6 

158.2 

i57.o 

155-8 

154.6 

153.4 

152.2 

151.0 

149.9 

1450 

166.8 

164.2 

161.7 

159-3 

158.1 

156.8 

155.7 

154.5 

153.3 

152.1 

150.9 

1460 

168.0 

165.4 

162.8 

160.4 

I59-1 

157.9 

156.7 

155.5 

154.3 

153.1 

I5L9 

I47P 

169.1 

166.5 

164.0 

161.5 

160.2 

159-0 

157-8 

156.6 

155-4 

154.2 

153-0 

1480 

170.3 

167.6 

165.1 

162.6 

161.3 

1  60.  1 

158.9 

157.6 

156.4 

155.2 

154.0 

!    1490 

1714 

168.8 

166.2 

163.7 

162.4 

161.2 

159.9 

158.7 

157.5 

156.3 

I55-I 

j    1500 

172.6 

169.9 

167.3 

164.8 

163.5 

162.3 

161.0 

159.8 

158.5 

157.3 

156.1 

SMITHSONIAN  TABLES. 


82 


TABLE  17. 
REDUCTION    OF   THE     BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 


Values   of    200O  X  m. 


Z  (i— 


1 8444+67. 536+ .oo3Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

4-  24° 

+  26° 

+  28° 

+  32° 

+  36° 

IOOO 

103.3 

102.5 

101.7 

100.9 

IOO.2 

994 

98.7 

98.0 

97-3 

95-9 

94-5 

IOIO 

104.3 

103.5 

102.7 

101.9 

IOI.2 

100.4 

99-7 

99-0 

98.2 

96.8 

954 

IO2O 

105.3 

104.5 

103.7 

103.0 

102.2 

101.4 

100.7 

99-9 

99.2 

97-8 

964 

1030 

106.4 

105.6 

104.8 

104.0 

103.2 

102.4 

101.7 

100.9 

IOO.2 

98.7 

97-3 

1040 

107.4 

106.6 

105.8 

105.0 

IO4.2 

103.4 

IO2.6 

101.9 

IOI.I 

99-7 

98.3 

1050 

108.4 

107.6 

106.8 

1  06.0 

105.2 

104.4 

103.6 

102.9 

102.  1 

100.6 

99-2 

1060 

109.5 

108.6 

107.8 

107.0 

106.2 

105.4 

104.6 

103.9 

I03.I 

101.6 

IOO.I 

1070 

110.5 

109.7 

108.8 

108.0 

107.2 

106.4 

105.6 

104.8 

I04.I 

102.6 

IOI.I 

1080 

111.5 

110.7 

109.8 

109.0 

108.2 

107.4 

106.6 

105.8 

105.0 

103.5 

102.0 

1090 

II2.6 

111.7 

110.9 

IIO.O 

109.2 

108.4 

107.6 

106.8 

I  O6.O 

104.5 

103.0 

1100 

113.6 

112.7 

111.9 

III.O 

IIO.2 

109.4 

108.6 

107.8 

107.0 

105.4 

103.9 

IIIO 

114.6 

113.8 

112.9 

II2.0 

III.  2 

110.4 

109.6 

108.8 

108.0 

106.4 

I04.9 

1120 

115.7 

114.8 

II3-9 

II3.I 

II2.2 

111.4 

110.5 

109.7 

108.9 

107.4 

105.8 

1130 

116.7 

115-8 

114.9 

II4.I 

H3.2 

112.4 

in-5 

110.7 

109.9 

108.3 

106.8 

1140 

117.7 

116.8 

115-9^ 

H5.I 

II4.2 

II3-4 

112.5 

111.7 

IIO.9 

109.3 

107.7 

1150 

118.8 

117.9 

117.0 

116.1 

H5.2 

114.4 

H3.5 

112.7 

iii.8 

1  10.2 

108.6 

1160 

119.8 

118.9 

118.0 

117.1 

116.2 

H5.3 

II4.5 

113.6 

II2.8 

1  1  1.2 

109.6 

1170 

120.8 

119.9 

119.0 

118.1 

117.2 

116.3 

H5.5 

114.6 

113.8 

II2.I 

110.5 

1180 

121.9 

120.9 

120.0 

119.1 

118.2 

II7-3 

116.5 

115.6 

114.8 

H3.I 

111.5 

1190 

122.9 

122.0 

I2I.O 

1  20.  1 

119.2 

118.3 

117.4 

116.6 

H57 

II4.I 

112.4 

1200 

123.9 

123.0 

I22.O 

121.  1 

120.2 

H9.3 

118.4 

117.6 

116.7 

H5.0 

II3-4 

I2IO 

125.0 

124.0 

I23.I 

122.  1 

I2I.2 

120.3 

119.4 

118.5 

117.7 

116.0 

H4.3 

I22O 

126.0 

125.0 

I24.I 

I23.I 

122.2 

121.3 

120.4 

II9-5 

118.6 

116.9 

II5-3 

1230 

127.0 

I26.I 

I25.I 

124.2 

123.2 

122.3 

121.4 

120.5 

119.6 

117.9 

116.2 

1240 

128.1 

I27.I 

I26.I 

125.2 

124.2 

123.3 

122.4 

121.5 

120.6 

118.9 

117.2 

1250 

129.1 

I28.I 

I27.I 

126.2 

125.2 

124.3 

123.4 

122.5 

I2I.6 

119.8 

118.1 

1260 

130.1 

I29.I 

I28.I 

127.2 

126.2 

125.3 

124.4 

123.4 

122.5 

120.8 

119.0 

1270 

131.2 

130.2 

129.2 

128.2 

127.2 

126.3 

125.3 

124.4 

123.5 

121.7 

I2O.O 

1280 

132.2 

I3I.2 

130.2 

129.2 

128.2 

127.3 

126.3 

125-4 

124.5 

122.7 

I2O.9 

1290 

133.2 

132.2 

I3I.2 

130.2 

129.2 

128.3 

127.3 

126.4 

125.5 

123.6 

I2I.9 

1300 

134.3 

133-2 

132.2 

I3I.2 

130.2 

129.3 

128.3 

127.4 

126.4 

124.6 

122.8 

1310 

135.3 

134-3 

133.2 

132.2 

I3I.2 

130.3 

129.3 

128.3 

127.4 

125.6 

123-8 

1320 

136.3 

135-3 

134.2 

133-2 

132.2 

131-3 

130-3 

129.3 

128.4 

126.5 

124.7 

1330 

137.4 

136.3 

135-3 

T34.2 

133-2 

132.2 

I3I-3 

130.3 

129.3 

127.5 

125-7 

1340 

138.4 

137.3 

136.3 

135.3 

134.2 

133.2 

132.2 

13^3 

130-3 

128.4 

126.6 

1350 

139-4 

138.4 

137.3 

136.3 

135.2 

134.2 

133.2 

132.3 

131.3 

129.4 

127.5 

1360 

140.5 

139-4 

138.3 

137.3 

136.2 

135.2 

134.2 

133.2 

132.3 

130.3 

128.5 

1370 

141.5 

140.4 

139-3 

138.3 

137.2 

136.2 

135-2 

134.2 

133.2 

131.3 

1294 

1380 

142.5 

I4I.4 

140.3 

139.3 

138.2 

137.2 

136.2 

135-2 

134.2 

132.3 

130.4 

1390 

143-5 

142.4 

141.4 

140.3 

139.2 

138.2 

137.2 

136.2 

135.2 

133.2 

I3L3 

1400 

144.6 

143-5 

T42.4 

I4I.3 

140.2 

139.2 

138.2 

137.2 

136.2 

134.2 

132.3 

1410 

145.6 

144-5 

143-4 

142.3 

I4L3 

140.2 

139.2 

138.1 

137.1 

135.1 

133-2 

1420 

146.6 

145-5 

1444 

143-3 

142.3 

141.2 

140.1 

I39-I 

138.1 

136.1 

134.2 

143° 

147.7 

146.5 

145-4 

144.3 

143.3 

142.2 

141.1 

140.1 

I39-1 

137.1 

I35-I 

1440 

148.7 

147.6 

146.4 

145.3 

M4.3 

143-2 

142.1 

141.1 

140.0 

138.0 

136.0 

1450 

149-7 

148.6 

147.5 

146.4 

145-3 

144.2 

143-  1 

142.1 

141.0 

139.0 

137.0 

1460 

150.8 

149.6 

148.5 

1474 

146.3 

145.2 

144.1 

143.0 

142.0 

139-9 

137-9 

1470 

151.8 

150.6 

H9.5 

148.4 

147.3 

146.2 

I45-I 

144.0 

143.0 

140.9 

138.9 

1480 

152.8 

I5I.7 

150.5 

1494 

148.3 

147.2 

146.1 

145.0 

H3-9 

141.8 

1398 

1490 

153-9 

152.7 

I5I.5 

150.4 

149-3 

148.2 

147.1 

146.0 

144.9 

142.8 

140.8 

1500 

154.9 

153-7 

152.5 

I5I.4 

150.3 

149.1 

148.0 

147.0 

145-9 

143.8 

I4I.7 

SMITHSONIAN  TABLES. 


TABLE  17. 

REDUCTION     OF    THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Values   of    2000  X  m.  m  =  —- 

18444+67. 536+ .003^ 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

1500 

172.6 

169.9 

167-3 

164.8 

163-5 

162.3 

161.0 

159.8 

158.5 

157.3 

156.1 

1510 

173-7 

171.0 

168.4 

165.9 

164.6 

163.3 

162.1 

160.8 

159.6 

158.4 

I57.I 

1520 

174.9 

172.2 

169.5 

167.0 

165-7 

164.4 

163.2 

161.9 

160.7 

1594 

158.2 

1530 

176.0 

173-3 

170.7 

168.1 

166.8 

165.5 

164.2 

163.0 

161.7 

160.5 

159-2 

1540 

177.2 

174.4 

171.8 

169.1 

167.9 

166.6 

165-3 

164.0 

162.8 

161.5 

160.3 

1550 

178.3 

175-6 

172.9 

170.2 

169.0 

167.7 

166.4 

165.1 

163.8 

162.6 

161.3 

1560 

179.5 

176.7 

174.0 

171.3 

170.0 

168.7 

167.5 

166.2 

164.9 

163.6 

162.3 

1570 

180.6 

177-8 

i75.i 

172.4 

171.1 

169.8 

168.5 

167.2 

165.9 

164.7 

163.4 

1580 

181.8 

179.0 

176.2 

173.5 

172.2 

170.9 

169.6 

168.3 

167.0 

165.7 

164.4 

1590 

182.9 

180.1 

177.3 

174.6 

I73-3 

172.0 

170.7 

169.4 

168.1 

166.8 

165.5 

1600 

184.1 

181.2 

178.5 

175.7 

1744 

173.1 

171.7 

170.4 

169.1 

167.8 

166.5 

1610 

185.2 

182.4 

179.6 

176.8 

175.5 

174.2 

172.8 

I7I.5 

170.2 

168.9 

167-5 

1620 

186.4 

183-5 

180.7 

177.9 

176.6 

175.2 

173-9 

172.6 

171.2 

169.9 

168.6 

1630 

187.5 

184.6 

181.8 

179.0 

177-7 

176.3 

175-0 

173.6 

172.3 

170.9 

169.6 

1640 

188.7 

185.8 

182.9 

180.1 

178.8 

177.4 

176.0 

174.7 

173-3 

172.0 

170.7 

1650 

189.8 

186.9 

184.0 

181.2 

179.8 

178.5 

I77.I. 

175.7 

174.4 

173.0 

171.7 

1660 

191.0 

188.0 

185.1 

182.3 

180.9 

179.6 

178.2 

176.8 

1754 

174.1 

172.7 

1670 

192.2 

189.2 

186.3 

183.4 

182.0 

180.6 

179-3 

177.9 

176.5 

I75-I 

173-8 

1680 

J93-3 

190.3 

187.4 

184.5 

183.1 

181.7 

180.3 

178.9 

177.6 

176.2 

174.8 

1690 

194.5 

191.4 

188.5 

185.6 

184.2 

182.8 

181.4 

180.0 

178.6 

177.2 

175-9 

1700 

195.6 

192.6 

189.6 

186.7 

185-3 

183.9 

182.5 

181.1 

179.7 

178.3 

176.9 

1710 

196.8 

193.7 

190.7 

187.8 

186.4 

185.0 

183.5 

182.1 

180.7 

179-3 

177.9 

1720 

197.9 

194.8 

191.8 

188.9 

187-5 

186.0 

184.6 

183-2 

181.8 

180.4 

179.0 

1730 

199.1 

196.0 

193.0 

190.0 

188.6 

187.1 

185-7 

184.3 

182.8 

181.4 

180.0 

1740 

200.2 

197.1 

194.1 

191.1 

189.7 

188.2 

186.8 

185-3 

183.9 

182.5 

181.1 

1750 

201.4 

198.2 

195-2 

192.2 

190.7 

189.3 

187.8 

186.4 

185.0 

183.5 

182.1 

1760 

202.5 

J99.3 

196.3 

I93-3 

191.8 

190.4 

188.9 

187.5 

186.0 

184.6 

183.1 

1770 

203.7 

200.5 

197.4 

194.4 

192.9 

I9L5 

190.0 

188.5 

187.1 

185.6 

184.2 

1780 

204.8 

20  1.  6 

198.5 

195-5 

194.0 

192-5 

191.1 

189.6 

188.1 

186.7 

185.2 

ti79o 

2O6.O 

202.7 

199.6 

196.6 

I95.I 

193.6 

192.1 

190.7 

189.2 

187.7 

186.3 

1800 

2O7.I 

203.9 

200.8 

197.7 

196.2 

194.7 

193.2 

191.7 

190.2 

188.8 

187.3 

1810 

208.3 

205.0 

201.9 

198.8 

197.3 

195-8 

194.3 

192.8 

I9L3 

189.8 

188.3 

1820 

2094 

206.1 

203.0 

199.9 

198.4 

196.9 

195.3 

193.8 

192.4 

190.9 

189.4 

1830 

2IO.6 

207.3 

204.1 

2O  I.  O 

199.5 

197.9 

196.4 

194.9 

I93-4 

191.9 

190.4 

1840 

211.7 

208.4 

205.2 

2O2.I 

200.6 

199.0 

197.5 

196.0 

194-5 

193.0 

191.5 

1850 

212.9 

209.5 

206.3 

203.2 

201.6 

200.  i 

198.6 

197.0 

*95.5 

194.0 

192.5 

1860 

214.0 

210.7 

207.4 

204.3 

202.7 

201.2 

199.6 

198.1 

196.6 

195-1 

'93-6 

1870 

215.2 

2II.8 

208.6 

2054 

203.8 

202.3 

200.7 

199.2 

197.6 

196.1 

194.6 

1880 

216.3 

212.9 

209.7 

206.5 

204.9 

203.3 

201.8 

200.2 

198.7 

197.2 

195.6 

1890 

217.5 

214.1 

210.8 

207.6 

206.0 

2044 

202.9 

201.3 

199.7 

198.2 

196.7 

1900 

218.6 

215.2 

211.9 

208.7 

207.1 

205.5 

203.9 

2O2.4 

200.8 

199.3 

197.7 

1910 

219.8 

216.3 

213.0 

209.8 

208.2 

206.6 

205.0 

2034 

201.9 

200.3 

198.8 

1920 

220.9 

217-5 

214.1 

210.9 

209.3 

207.7 

206.  1 

204.5 

202.9 

201.3 

199.8 

1930 

222.1 

218.6 

215.2 

2I2.O 

210.4 

208.8 

207.2 

205.6 

204.0 

202.4 

200.8 

1940 

223.2 

219.7 

216.4 

2I3.I 

211.4 

209.8 

208.2 

206.6 

205.0 

203.4 

201.9 

1950 

2244 

220.9 

217.5 

214.2 

212.5 

2IO.9 

209.3 

207.7 

206.1 

204.5 

202.9 

1960 

225.5 

222.0 

218.6 

215-3 

213.6 

212.0 

210.4 

208.8 

207.1 

205.5 

204.0 

1970 

226.7 

223.1 

219.7 

216.4 

214.7 

2I3.I 

211.4 

209.8 

208.2 

206.6 

205.0 

1980 

227.8 

224.3 

220.8 

217-5 

215.8 

214.2 

212.5 

210.9 

209.3 

207.6 

206.0 

1990 

229.0 

2254 

221.9 

218.6 

216.9 

215-2 

213.6 

2II.9 

210.3 

208.7 

207.1 

2000 

230.1 

226.5 

223.0 

219.7 

2  1  8.0 

2l6.3 

214.7 

213.0 

211.4 

209.7 

208.  1 

SMITHSONIAN  TABLES. 


TABLE  17. 
REDUCTION    OF    THE    BAROMETER   TO   SEA    LEVEL. 

METRIC    MEASURES. 

Values   of    20OO  X  m.  m  = - __ 

18444+67.5;  0+.003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE   OF  AIR   COLUMN   IN   CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

1500 

154-9 

153-7 

152.5 

151-4 

150-3 

149.1 

148.0 

147.0 

145-9 

143-8 

141.7 

1510 

155-9 

154-7 

153-6 

152.4 

151-3 

150.1 

149.0 

147.9 

146.8 

144.7 

142.7 

1520 

157-0 

155-8 

154.6 

153-4 

152.3 

151.1 

150.0 

148.9 

147.8 

145-7 

143.6 

1530 

158.0 

156.8 

155-6 

154-4 

153-3 

152.1 

151.0 

149.9 

148.8 

146.6 

144-5 

*54o 

159.0 

157.8 

156.6 

155-4 

154.3 

I53.I 

152.0 

150.9 

149.8 

147.6 

145-5 

1550 

1  60.  i 

158.8 

157-6 

156.4 

155.3 

I54-I 

153-0 

151.8 

150.7 

148.6 

146.4 

1560 

161.1 

159-9 

158.7 

157-5 

156.3 

I55.I 

154.0 

152-8 

151-7 

149-5 

147.4 

1570 

162.1 

160.9 

159.7 

158.5 

157.3 

156.1 

154-9 

153-8 

152.7 

150.5 

148.3 

1580 

163.2 

161.9 

160.7 

159-5 

158-3 

I57.I 

155-9 

154-8 

153-7 

151-4 

149-3 

1590 

164.2 

162.9 

161.7 

160.5 

159-3 

158.1 

156.9 

155.8 

154.6 

1524 

150.2 

1600 

165.2 

164.0 

162.7 

161.5 

160.3 

I59.I 

157.9 

156.7 

155-6 

153-3 

151-2 

1610 

166.3 

165.0 

163.7 

162.5 

161.3 

160.1 

158-9 

157.7 

156.6 

154.3 

152.1 

1620 

167-3 

166.0 

164.8 

163.5 

162.3 

161.1 

!59-9 

158.7 

157.5 

155.3 

153-0 

1630 

168.3 

167.0 

.  165.8 

164.5 

J63-3 

162.1 

160.9 

159-7 

158.5 

156.2 

154.0 

1640 

169.4 

168.1 

166.8 

165.5 

164.3 

163.1 

161.9 

160.7 

159-5 

157.2 

154.9 

1650 

170.4 

169.1 

167.8 

166.5 

165.3 

164.1 

162.8 

161.6 

160.5 

158.1 

155-9 

1660 

171.4 

170.1 

168.8 

167.5 

166.3 

165.1 

163.8 

162.6 

161.4 

159-1 

156.8 

1670 

172.5 

171.1 

169.8 

168.6 

167.3 

166.0 

164.8 

163.6 

162.4 

1  60.  i 

157-8 

1680 

173-5 

172.2 

170.9 

169.6 

168.3 

167.0 

165.8 

164.6 

163.4 

161.0 

158-7 

1690 

174-5 

173.2 

171.9 

170.6 

169-3 

168.0 

166.8 

165-6 

164.3 

162.0 

159-7 

1700 

175-6 

174.2 

172.9 

171.6 

170.3 

169.0 

167.8 

166.5 

165.3 

162.9 

160.6 

1710 

176.6 

175-2 

173-9 

172.6 

171-3 

170.0 

168.8 

167-5 

166.3 

163.9 

161.5 

1720 

177.6 

176.3 

174-9 

173.6 

172.3 

171.0 

169.7 

168.5 

167.3 

164.8 

162.5 

1730 

178.7 

177-3 

175-9 

174.6 

173.3 

172.0 

170.7 

169.5 

168.2 

165.8 

163.4 

1740 

179.7 

178.3 

177.0 

175-6 

174.3 

173.0 

171.7 

170.5 

169.2 

166.8 

164.4 

1750 

180.7 

179-3 

178.0 

176.6 

175-3 

174.0 

172.7 

171.4 

170.2 

167.7 

165-3 

1760 

181.7 

180.4 

179.0 

177.6 

176.3 

175-0 

173-7 

172.4 

171.2 

168.7 

166.3 

1770 

182.8 

181.4 

180.0 

178.6 

177-3 

176.0 

174-7 

1734 

172.1 

169.6 

167.2 

1780 

183-8 

182.4 

181.0 

179.7 

178.3 

177.0 

175.7 

1744 

I73-1 

170.6 

168.2 

1790 

184.8 

183.4 

182.0 

180.7 

179-3 

178.0 

176.7 

1754 

174.1 

171.6 

169.1 

1800 

185-9 

184.5 

183.1 

181.7 

180.3 

179.0 

177.6 

176.3 

i75.o 

172.5 

170.0 

1810 

186.9 

185.5 

184.1 

182.7 

181.3 

180.0 

178.6 

177.3 

176.0 

173-5 

171.0 

1820 

187.9 

186.5 

185.1 

183.7 

182.3 

181.0 

179.6 

178.3 

177.0 

174.4 

171.9 

1830 

189.0 

187-5 

186.1 

184.7 

183-3 

181.9 

180.6 

!79-3 

178.0 

1754 

172.9 

1840 

190.0 

188.6 

187.1 

185-7 

184.3 

182.9 

181.6 

180.3 

178.9 

176.3 

173-8 

1850 

191.0 

189.6 

188.1 

186.7 

185-3 

183-9 

182.6 

181.2 

179.9 

177-3 

174-8 

1860 

192.1 

190.6 

189.2 

187.7 

186.3 

184.9 

183.6 

182.2 

180.9 

178.3 

175-7 

1870 

193-1 

191.6 

190.2 

188.7 

187.3 

185-9 

184.5 

183.2 

181.8 

179.2 

176.7 

i    1880 

194.1 

192.7 

191.2 

189.7 

188.3 

186.9 

185.5 

184.2 

182.8 

180.2 

177.6 

1890 

195-2 

193-7 

192.2 

190.8 

189-3 

187,9 

186.5 

185.1 

183-8 

181.1 

178.5 

1900 

196.2 

194.7  |  193.2 

191.8 

190.3 

188.9 

187.5 

186.1 

184.8 

182.1 

179-5 

1910 

197.2 

195.7 

194.2 

192.8 

T9I-3 

189.9 

188.5 

187.1 

185.7 

183.1 

180.4 

1920 

'98.3 

196.8 

195-3 

193-8 

192.3 

190.9 

189-5 

188.1 

186.7 

184.0 

181.4 

!    T93Q 

T99-3 

197.8 

196.3 

194.8 

193-3 

191.9 

190.5 

189.1 

187.7 

185.0 

182.3 

1940 

200.3 

198.8 

197.3 

195.8 

194.3 

192.9 

191-5 

190.0 

188.7 

185.9 

183.3 

1950 

201.4 

199.8 

198-3 

196.8 

195.3 

J93.9 

192.4 

191.0 

189.6 

186.9 

184.2 

'.    1960 

202.4 

200.8 

!99-3 

197.8 

196.3 

194.9 

193-4 

192.0 

190.6 

187.8 

185.2 

1970 

203.4 

201.9 

200.3 

198.8 

i97.'3 

195-9 

194.4 

193.0 

191.6 

188.8 

1  86.  i 

1980 

204.5 

202.9 

201.4 

199.8 

198.3 

196.9 

1954 

194.0 

192.5 

189.8 

187.0 

1990 

205.5 

203.9 

202.4 

200.8 

199-3 

197.9 

196.4 

194.9 

193-5 

190.7 

188.0 

2000 

206.5 

204.9    203.4 

201.9 

200.3 

198.8 

1974 

T95-9 

194-5 

191.7 

188.9 

SMITHSONIAN  TABLES. 


8.S 


TABLE  17. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 
METRIC    MEASURES. 

Values   of   2000  X  m.  m  = 

18444+67. 5304- .oo3Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN  IN   CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

2000 

230.1 

226.5 

223.0 

219.7 

218.0 

216.3 

214.7 

213.0 

211.4 

209.7 

208.1 

2010 

231-3 

227.7 

224.2 

220.8 

219.1 

217.4 

215-7 

214.1 

212.4 

210.8 

209.2 

2020 

232.4 

228.8 

225.3 

221.9 

220.2 

218.5 

216.8 

215-1 

213-5 

2II.8 

210.2 

2030 

233-6 

229.9 

226.4 

223.0 

221.3 

219.6 

217.9 

216.2 

214-5 

212.9 

211.  2 

2040 

234-7 

231.1 

227.5 

224.0 

222.3 

220.6 

219.0 

217.3 

215.6 

213.9 

212.3 

2050 

235.9 

232.2 

228.6 

225.1 

2234 

221.7 

220.0 

218.3 

216.7 

215.0 

213-3 

2060 

237.0 

233-3 

229.7 

226.2 

224.5 

222.8 

221.  1 

219.4 

217.7 

2  1  6.0 

2144 

2070 

238.2 

2344 

230.9 

227.3 

225.6 

223.9 

222.2 

220.5 

218.8 

217.1 

2154 

2080 

239-3 

235-6 

232.0 

228.4 

226.7 

225.0 

223.2 

221.5 

219.8 

218.1 

216.4 

2090 

240.5 

236.7 

233-1 

229.5 

227.8 

2^6.1 

224.3 

222.6 

220.9 

219.2 

217-5 

2100 

241.6 

237.8 

234-2 

230.6 

228.9 

227.1 

2254 

223.7 

221.9 

220.2 

218.5 

2110 

242.8 

239.0 

235-3 

231.7 

230.0 

228.2 

226.5 

224.7 

223.0 

221.3 

219.6 

2120 

243.9 

240.1 

236.4 

232.8 

23I.I 

229.3 

227.5 

225.8 

224.0 

222.3 

220.6 

2130 

245.1 

241.2 

237-5 

233.9 

232.2 

230.4 

228.6 

226.9 

225.1 

2234 

221.6 

2140 

246.2 

242.4 

238.7 

235.0 

233-2 

231.5 

229.7 

227.9 

226.2 

2244 

222.7 

2150 

2474 

243-5 

239.8 

236.1 

234-3 

232.5 

230.8 

229.0 

227.2 

225.5 

223.7 

2160 

248.5 

244.6 

240.9 

237.2 

235-4 

233.6 

231.8 

230.0 

228.3 

226.5 

224.8 

2170 

249.7 

245.8 

242.0 

238.3 

236.5 

234.7 

232.9 

23I.I 

229.3 

227.6 

225.8 

2180 

250.8 

246.9 

243-1 

239.4 

237.6 

235-8 

234.0 

232.2 

230.4 

228.6 

226.8 

2190 

252.0 

248.0 

244.2 

240.5 

238.7 

236.9 

235.1 

233-2 

231-4 

229.7 

227.9 

2200 

253.1 

2492 

245-4 

241.6 

239.8 

237.9 

236.1 

234.3 

232.5 

230.7 

228.9 

2210 

254.3 

250-3 

246.5 

242.7 

240.9 

239.0 

237.2 

2354 

233-6 

231.7 

230.0 

2220 

2554 

2514 

247.6 

243.8 

242.O 

240.1 

238.3 

236.4 

234-6 

232.8 

231.0 

2230 

256.6 

252.6 

248.7 

244.9 

243.0 

241.2 

239-3 

237-5 

235-7 

233-8 

232.0 

2240 

257-7 

2537 

249.8 

246.0 

244.1 

242.3 

240.4 

238.6 

236.7 

234.9 

233-1 

2250 

258.9 

254-8 

250.9 

247.1 

245.2 

243-4 

241.5 

239.6 

237.8 

235.9 

234-1 

2260 

260.0 

256.0 

252.0 

248.2 

246.3 

244.4 

242.6 

240.7 

238.8 

237.0 

235-2 

2270 

261.2 

257-1 

253-2 

249.3 

2474 

245-5 

243.6 

241.8 

239-9 

238.0 

236.2 

2280 

262.3 

258.2 

254.3 

250.4 

248.5 

246.6 

244.7 

242.8 

241.0 

239.1 

237.2 

2290 

263.5 

259-4 

255-4 

251.5 

249.6 

247-7 

245-8 

243-9 

242.0 

240.1 

238.3 

2300 

264.6 

260.5 

256.5 

252.6 

250.7 

248.8 

246.9 

245.0 

243.1 

241.2 

239-3 

2310 

265.8 

261.6 

257-6 

253.7 

251.8 

249-8 

247.9 

246.0 

244.1 

242.2 

240.4 

2320 

266.9 

262.8 

258.7 

254.8 

252.9 

250.9 

249.0 

247.1 

245.2 

243-3 

241.4 

2330 

268.1 

263.9 

259.8 

255.9 

253-9 

252.0 

250.1 

248.1 

246.2 

244-3 

242.4 

2340 

269.2 

265.0 

261.0 

257.0 

255-0 

253-1 

25I.I 

249.2 

247-3 

245-4 

243-5 

2350 

270.4 

266.1 

262.1 

258.1 

256.1 

254.2 

252.2 

250.3 

248.3 

246.4 

244-5 

2360 

271-5 

267.3 

263.2 

259.2 

257.2 

255-2 

253-3 

251.3 

249.4 

247-5 

245.6 

2370 

272.7 

268.4 

264.3 

260.3 

258.3 

256.3 

254-4 

252.4 

250.5 

248.5 

246.6 

2380 

273-8 

269.5 

265.4 

261.4 

259-4 

2574 

2554 

253-5 

251.5 

249.6 

247.6 

2390 

275.0 

270.7 

266.5 

262.5 

260.5 

258.5 

256.5 

254.5 

252.6 

250.6 

248.7 

2400 

276.1 

271.8 

267.7 

263.6 

261.6 

259-6 

257.6 

255-6 

253.6 

251.7 

249.7 

2410 

277-3 

272.9 

268.8 

264.7 

262.7 

260.7 

258.7 

256.7 

254-7 

252.7 

250.8 

2420 

278.4 

274.1 

269.9 

265.8 

263.7 

261.7 

259-7 

257.7 

255.7 

253-8 

251.8 

2430 

279.6 

275.2 

271.0 

266.9 

264.8 

262.8 

260.8 

258.8 

256.8 

254.8 

252.8 

2440 

280.7 

276.3 

272.1 

268.0 

265.9 

263-9 

261.9 

259-9 

257.9 

255-9 

253-9 

2450 

281.9 

277.5 

273.2 

269.1 

267.0 

265.0 

262.9 

260.9 

258.9 

256.9 

254-9 

2460 

283.0 

278.6 

274-3 

270.2 

268.1 

266.1 

264.0 

262.O 

260.0 

258.0 

256.0 

2470 

284.2 

279.7 

275.5 

271.3 

269.2 

267.1 

265.1 

263.1 

261.0 

259.0 

257.0 

2480 

285-3 

280.9 

276.6 

272.4 

270.3 

268.2 

266.2 

264.1 

262.1 

260.1 

258.0 

2490 

286.5 

282.0 

277.7 

273.5 

271.4 

269.3 

267.2 

265.2 

263.1 

26l.I 

259.1 

2500 

287.6 

283.1 

278.8 

274.5 

272.5 

270.4 

268.3 

266.2       264.2 

262.2 

260.1 

SWTHSONIAN  TABLE*. 


86 


TABLE  17. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i— 0) 


Values   of   2000  X  m. 


18444+67. 530+.003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR  COLUMN   IN   CENTIGRADE  DEGREES   (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

2000 

206.5 

204.9 

203.4 

201.9 

200.3 

198.8 

1974 

195.9 

194.5 

191.7 

188.9 

i     2010 

207.6 

206.0 

204.4 

202.9 

201.3 

199.8 

198.4 

196.9 

195.5 

192.6 

189.9 

2O2O 

208.6 

207.0 

205.4 

203.9 

202.3 

200.8 

J99.3 

197.9 

196.4 

193.6 

190.8 

2030 

209.6 

208.0 

206.4 

204.9 

203.3 

201.8 

200.3 

198.8 

1974 

194.6 

191.8 

2O4O 

210.7 

209.0 

207.5 

205-9 

204.3 

202.8 

201.3 

199.8 

198.4 

195-5 

192.7 

2050 

211.7 

2  10.  1 

208.5 

206.9 

205.3 

203.8 

202.3 

200.8 

199.3 

196-5 

193-7 

2060 

212.7 

211.  1 

209.5 

207.9 

206.3 

204.8 

203.3 

201.8 

200.3 

1974 

194.6 

2070 

213.8 

212.  1 

210.5 

208.9 

207.3 

205.8 

204.3 

202.8 

201.3 

198.4 

195.5 

2080 

214.8 

2I3.I 

211.5 

209.9 

208.3 

206.8 

205-3 

203.7 

202.3 

I99-3 

196.5 

2090 

215.8 

214.2 

212.5 

210.9 

209.3 

207.8 

206.3 

204.7 

203.2 

200.3 

1974 

2100 

216.8 

215-2 

213.5 

211.9 

210.4 

208.8 

207.2 

205.7 

204.2 

201.3 

198.4 

2110 

217.9 

216.2 

214.6 

213.0 

211.4 

209.8 

208.2 

206.7 

205.2 

202.2 

199-3 

2120 

218.9 

217.2 

215.6 

214.0 

212.4 

210.8 

209.2 

207.7 

206.2 

203.2 

200.3 

2130 

219.9 

218.3 

216.6 

215.0 

213.4 

2II.8 

210.2 

208.6 

207.1 

204.1 

2OI.2 

2T4O 

22I.O 

219.3 

217.6 

216.0 

214.4 

212.8 

2II.2 

209.6 

208.1 

205.1 

2O2.2 

2150 

222.O 

220.3 

218.6 

217.0 

2154 

213.8 

212.2 

210.6 

209.1 

206.  1 

203.1 

2160 

223.0 

221.3 

219.6 

218.0 

216.4 

214.7 

213.2 

211,6 

210.0 

207.0 

204.0 

2170 

224.1 

222.4 

220.7 

219.0 

217.4 

215.7 

2I4.I 

212.6 

2II.O 

208.0 

205.0 

2180 

225.1 

2234 

221.7 

220.0 

218.4 

216.7 

2I5.I 

213.5 

212.0 

208.9 

205.9 

2190 

226.1 

2244 

222.7 

221.0 

219.4 

217.7 

216.1 

214.5 

213.0 

209.9 

206.9 

2200 

227.2 

2254 

223.7 

222.O 

220.4 

218.7 

217.1 

215-5 

213.9 

210.8 

207.8 

22  IO 

228.2 

226.5 

224.7 

223.0 

221.4 

219.7 

218.1 

216.5 

214.9 

2II.8 

208.8 

2220 

229.2 

227.5 

225.7 

224.O 

222.4 

220.7 

219.1 

217.5 

215.9 

212.8 

209.7 

2230 

230.3 

228.5 

226.8 

225.1 

223.4 

221.7 

220.1 

218.4 

216.8 

213-7 

210.7 

2240 

231.3 

229.5 

227.8 

226.1 

224.4 

222.7 

221.0 

219.4 

217.8 

214.7 

2II.6 

2250 

232.3 

230.6 

228.8 

227.1 

225.4 

2237 

222.0 

220.4 

218.8 

215.6 

212.5 

2260 

2334 

231.6 

229.8 

228.1 

226.4 

224.7 

223.0 

221.4 

219.8 

216.6 

213-5 

2270 

2344 

232.6 

230.8 

229.1 

227.4 

225.7 

224.0 

222.4 

22O.7 

217.6 

214.4 

2280 

2354 

233-6 

231.8 

230.1 

228.4 

226.7 

225.0 

223.3 

221.7 

218.5 

215.4 

2290 

236.5 

2347 

232.9 

23I.I 

229.4 

227.7 

226.O 

224.3 

222.7 

219.5 

216.3 

2300 

237-5 

235.7 

233-9 

232.1 

230.4 

228.7 

227.0 

225.3 

223.6 

220.4 

217.3 

2310 

238.5 

236.7 

234.9 

233-1 

231.4 

229.7 

228.0 

226.3 

224.6 

221.4 

218.2 

2320 

239.6 

237.7 

235.9 

234.1 

232.4 

230.7 

228.9 

227.3 

225.6 

222.3 

219.2 

2330 

240.6 

238.7 

236.9 

235-1 

2334 

231.6 

229.9 

228.2 

226.6 

223.3 

220.1 

2340 

241.6 

239.8 

237.9 

236.2 

2344 

232.6 

230.9 

229.2 

227.5 

224.3 

221.0 

2350 

242.7 

240.8 

239.0 

237.2 

2354 

233.6 

231.9 

230.2 

228.5 

225.2 

222.0 

2360 

243-7 

241.8 

240.0 

238.2 

236.4 

234.6 

232.9 

231.2 

229.5 

226.2 

222.9 

2370 

244.7 

242.8 

241.0 

239.2 

2374 

235.6 

233-9 

232.2 

230.4 

227.1 

223.9 

2380 

245-7 

243-9 

242.0 

240.2 

238.4 

236.6 

234.9 

233.1 

231.4 

228.1 

224.8 

2390 

246.8 

244.9 

243.0 

241.2 

239-4 

237.6 

235.8 

234.1 

232.4 

229.1 

225.8 

2400 

247.8 

245-9 

244.0 

242.2 

240.4 

238.6 

236.8 

235.1 

2334 

230.0 

226.7 

2410 

248.8 

246.9 

245.1 

243.2 

241.4 

239.6 

237-8 

236.1 

234-3 

231.0 

227-7 

2420 

249.9 

248.0 

246.1 

244.2 

242.4 

240.6 

238.8 

237.1 

235.3 

231.9 

228.6 

2430 

250.9 

249.0 

247.1 

245.2 

2434 

241.6 

239.8 

238.0 

236.3 

232.9 

229.5 

2440 

25L9 

250.0 

248.1 

246.2 

244.4 

242.6 

240.8 

239.0 

237.3 

233.8 

230.5 

2450 

253.0 

251.0 

249.1 

247-3 

2454 

243.6 

241.8 

240.0 

238.2 

234.8 

231.4 

2460 

254.0 

252.1 

250.1 

248.3 

246.4 

244.6 

242.8 

241.0 

239.2 

235.8 

232.4 

2470 

255-0 

253.1 

251.2 

249.3 

247-4 

245.6 

243-7 

241.9 

240.2 

236.7 

233.3   1 

2480 

256.1 

254.1 

252.2 

250.3 

248.4 

246.6 

244.7 

242.9 

24I.I 

237.7 

234-3 

2490 

257-1 

255-1 

253.2 

251.3 

249-4 

247-5 

245.7 

243-9 

242.1 

238.6 

235-2 

2500 

258.1 

256.2 

254.2 

252.3 

250.4 

248.5 

246.7 

244.9 

243-1 

239.6 

236.2 

SMITHSONIAN  TABLES. 


TABLE  17. 


REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Z  (i— )8) 


Values   of    2000  X  m. 


18444+67. 536+ .oo3Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR   COLUMN   IN  CENTIGRADE  DEGREES   (0). 

-16° 

-12° 

-8° 

-4° 

-2° 

0° 

+  2° 

+  4° 

+  6° 

+  8° 

+  10° 

2500 

287.6 

283.1 

278.8 

274.5 

272.5 

270.4 

268.3 

266.2 

264.2 

262.2 

260.1 

2510 

288.8 

284.3 

279.9 

275.6 

273.6 

271-5 

269.4 

267.3 

265.2 

263.2 

261.2 

2520 

289.9 

285.4 

281.0 

276.7 

274.6 

272.5 

270.5 

268.4 

266.3 

264.2 

262.2 

2530 

291.1 

286.5 

282.1 

277.8 

2/5-7 

273.6 

271-5 

269.4 

267.4 

265.3 

263.2 

2540 

292.2 

287.7 

283-3 

278.9 

276.8 

274.7 

272.6 

270.5 

268.4 

266.3 

264.3 

2550 

2934 

288.8 

284.4 

280.0 

277-9 

275-8 

273.7 

271.6 

269-5 

267.4 

265.3 

2560 

294-5 

289-9 

285.5 

281.1 

279.0 

276.9 

274-7 

272.6 

270.5 

268.4 

266.4 

2570 

295.7 

291.1 

286.6 

282.2 

280.1 

277.9 

275.8 

273-7 

271.6 

269.5 

267.4 

i   2580 

296.8 

292.2 

287.7 

283.3 

281.2 

279.0 

276.9 

274.8 

272.6 

270.5 

268.4 

2590 

298.0 

293-3 

288.8 

284.4 

282.3 

280.1 

278.0 

275.8 

273-7 

271.6 

269.5 

2600 

299.1 

294-5 

290.0 

285.5 

283.4 

281.2 

279.0 

276.9 

274.8 

272.6 

270.5 

2610 

300.3 

295-6 

291.1 

286.6 

284.4 

282.3 

280.1 

278.0 

275-8 

273-7 

271.6 

2620 

301.4 

296.7 

292.2 

287.7 

285.5 

283.4 

281.2 

279.0 

276.9 

274-7 

272.6 

2630 

302.6 

297.8 

293-3 

288.8 

286.6 

284.4 

282.3 

280.1 

277.9 

275.8 

273.6 

2640 

3037 

299.0 

294.4 

289.9 

287.7 

285.5 

283.3 

281.1 

279.0 

276.8 

274-7 

2650 

304.9 

300.1 

295-5 

291.0 

288.8 

286.6 

284.4 

282.2 

280.0 

277-9 

275.7 

2660 

306.0 

301.2 

296.6 

292.1 

289.9 

287.7 

285.5 

283.3 

281.1 

278.9 

276.8 

2670 

307.2 

302.4 

297.8 

293-2 

291.0 

288.8 

286.5 

284.3 

282.1 

280.0 

277-8 

2680 

308.3 

303-5 

298.9 

294.3 

292.1 

289.8 

287.6 

285.4 

283.2 

281.0 

278.8 

2690 

309-5 

304.6 

300.0 

2954 

293.2 

290.9 

288.7 

286.5 

284.3 

282.1 

279.9 

2700 

310.6 

305-8 

301.1 

296.5 

294.2 

292.0 

289.8 

287.5 

285.3 

283.1 

280.9 

2710 

311.8 

306.9 

302.2 

297.6 

295.3 

293.1 

290.8 

288.6 

286.4 

284.2 

282.0 

2720 

312.9 

308.0 

303-3 

298.7 

296.4 

294.2 

291.9 

289.7 

287.4 

285.2 

283.0 

2730 

314-1 

309.2 

304-5 

299.8 

297.5 

295-2 

293.0 

290.7 

288.5 

286.3 

284.0 

2740 

315.2 

310.3 

305.6 

300.9 

298.6 

296.3 

294.1 

291.8 

289.5 

287.3 

285.1 

2750 

316.4 

3II-4 

306.7 

302.0 

299.7 

2974 

295.1 

292.9 

290.6 

288.4 

286.1 

2760 

317.5 

312.6 

307.8 

303-1 

300.8 

298-5 

296.2 

293-9 

291.7 

289.4 

287.2 

2770 

3i8.7 

3I3.7 

308.9 

304.2 

301-9 

299.6 

297-3 

295.0 

292.7 

290.5 

288.2 

2780 

319.8 

314.8 

310.0 

305-3 

303.0 

300.6 

298.3 

296.1 

293.8 

291.5 

289.2 

2790 

321.0 

316.0 

311.1 

3064 

304.1 

301-7 

2994 

297.1 

294.8 

292.5 

290.3 

2800 

322.1 

3i7.i 

312.3 

307.5 

305.1 

302.8 

3oo.5 

298.2 

295-9 

293.6 

291.3 

2810 

323.3 

318.2 

3I3-4 

308.6 

306.2 

303-9 

301.6 

299.2 

296.9 

294.6 

292.4 

2820 

3244 

3194 

3H-5 

309.7 

307.3 

305-0 

302.6 

300.3 

298.0 

295.7 

2934 

2830 

325-6 

320.5 

315.6 

310.8 

308.4 

306.1 

303-7 

301.4 

299.0 

296.7 

294.4 

2840 

326.7 

321.6 

316.7 

3II-9 

309-5 

307.1 

304.8 

302.4 

300.1 

297.8 

295-5 

2850 

327.9 

322.8 

317.8 

3i3.o 

310.6 

308.2 

305.9 

303.5 

301.2 

298.8 

296.5 

2860 

329.0 

323-9 

318.9 

3H.I 

3II-7 

309-3 

306.9 

304-6 

302.2 

299.9 

297.6 

2870 

330-2 

325-0 

320.1 

315.2 

312.8 

310.4 

308.0 

305-6 

303.3 

300.9 

298.6 

2880 

331-3 

326.1 

321.2 

316.3 

313.9 

3H-5 

309.1 

306.7 

304-3 

302.0 

299.6 

2890 

332-5 

327-3 

322.3 

3J7-4 

3H-9 

312.5 

310.1 

307.8 

3054 

303-0 

300.7 

2900 

333-6 

328.4 

3234 

318.4 

316.0 

3I3-6 

311.2 

308.8 

306.4 

304.1 

301.7 

2910 

334.8 

329-5 

324-5 

3I9-5 

3J7.i 

314.7 

312.3 

309-9 

307-5 

305-1 

302.8 

2920 

335-9 

330.7 

325-6 

320.6 

318.2 

315.8 

3134 

311.0 

308.6 

306.2 

303.8 

2930 

337-1 

331-8 

326.7 

321.7 

3^9-3 

316.9 

3144 

312.0 

309.6 

307.2 

304.8 

2940 

338.2 

332.9 

327.9 

322.8 

320.4 

317.9 

315.5 

3I3.I 

310.7 

308.3 

305.9 

2950 

339-4 

334-1 

329.0 

323-9 

321.5 

319.0 

316.6 

3*4.2 

3H.7 

309-3 

306.9 

2960 

340.5 

335-2 

330.1 

325-0 

322.6 

320.1 

317.7 

315.2 

312.8 

310.4 

308.0 

2970 

34L7 

336.3 

331-2 

326.1 

323-7 

321-2 

318.7 

316.3 

313.8 

3IT-4 

309-0 

2980 

342.8 

337-5 

332.3 

327.2 

324-7 

322.3 

319-8 

317.3 

314.9 

312.5 

310.0 

2990 

344-0 

338-6 

3334 

328.3 

325-8 

323.3 

320.9 

318.4 

315.9 

3J3-5 

311.1 

3000 

345-1 

339-7 

334-5 

3294 

326.9 

3244 

321.9 

3I9.5 

317.0 

314.6 

312.1 

SMITHSONIAN  TABLES. 


88 


TABLE  17. 
REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Values   of   20OO  X  m.  m  = 

18444+67. 530+ .003Z 


Altitude 
in 
metres. 
Z. 

MEAN  TEMPERATURE  OF  AIR   COLUMN  IN  CENTIGRADE  DEGREES    (0). 

+  12° 

+  14° 

+  16° 

+  18° 

+  20° 

+  22° 

+  24° 

+  26° 

+  28° 

+  32° 

+  36° 

2500 

258.1 

256.2 

254.2 

252.3 

250.4 

248.5 

246.7 

244.9 

243-1 

239.6 

236.2 

2510 

259.2 

257.2 

255.2 

253-3 

251.4 

249-5 

247-7 

245-9 

244.1 

240.6 

237.1 

2520 

260.2 

258.2 

256.2 

254-3 

252.4 

250.5 

248.7 

246.8 

245.0 

241-5 

238.0 

2530 

261.2 

259.2 

257-3 

255-3 

253-4 

251-5 

249-7 

247.8 

246.0 

242.5 

239.0 

2540 

262.3 

260.3 

258.3 

256.3 

2544 

252.5 

250.6 

248.8 

247.0 

243-4 

239.9 

2550 

263-3 

261.3 

259-3 

257-3 

2554 

253-5 

251.6 

249.8 

247.9 

244.4 

240.9 

2560 

264.3 

262.3 

260.3 

258.4 

256.4 

254-5 

252.6 

250.7 

248.9 

245-3 

241.8 

2570 

265.4 

263.3 

261.3 

259-4 

2574 

255-5 

253-6 

251-7 

249.9 

246.3 

242.8 

2580 

266.4 

264.4 

262.3 

260.4 

258.4 

256.5 

254.6 

252.7 

250.9 

247-3 

243-7 

2590 

267.4 

265.4 

263.4 

261.4 

259-4 

257.5 

255-6 

253-7 

251.8 

248.2 

244-7 

2600 

268.5 

266.4 

264.4 

262.4 

260.4 

258.5 

256.6 

254-7 

252.8 

249.2 

245.6 

2610 

269.5 

267.4 

265.4 

263.4 

261.4 

259-5 

257.5 

255-6 

253-8 

250.1 

246.5 

2620 

270.5 

268.5 

266.4 

264.4 

262.4 

260.5 

258.5 

256.6 

254-8 

251.1 

247-5 

2630 

271.6 

269.5 

267.4 

265.4 

263.4 

261.5 

259-5 

257-6 

255.7 

252.0 

248.4 

2640 

272.6 

270.5 

268.4 

266.4 

264.4 

262.5 

260.5 

258.6 

256.7 

253.0 

249.4 

2650 

273.6 

27L5 

269.5 

267.4 

265.4 

263.4 

261.5 

259.6 

257.7 

254.0 

250.3 

2660 

274.7 

272.6 

270.5 

268.4 

266.4 

264.4 

262.5 

260.5 

258.6 

254-9 

251.3 

2670 

275.7 

273.6 

271-5 

269.4 

267.4 

265.4 

263.5 

261.5 

259.6 

255.9 

252.2 

2680 

276.7 

274.6 

272.5 

270.5 

268.4 

266.4 

264.4 

262.5 

260.6 

256.8 

253.1 

2690 

277.7 

275.6 

273-5 

271.5 

269.4 

267.4 

265.4 

263.5 

261.6 

257-8 

254.1 

2700 

278.8 

276.6 

274-5 

272.5 

270.4 

268.4 

266.4 

264.5 

262.5 

258.8 

255-0 

2710 

279.8 

277.7 

275.6 

273-5 

271.4 

269.4 

267.4 

265.4 

263.5 

259-7 

256.0 

2720 

280.8 

278.7 

276.6 

274-5 

272.4 

270.4 

268.4 

266.4 

264.5 

260.7 

256.9 

2730 

281.9 

279.7 

277.6 

275-5 

273-4 

271.4 

269.4 

267.4 

265.4 

261.6 

257-9 

2740 

282.9 

280.7 

278.6 

276.5 

274-4 

272.4 

270.4 

268.4 

266.4 

262.6 

258.8 

2750 

283.9 

281.8 

279.6 

277-5 

2754 

273-4 

271.4 

269.4 

267.4 

263.5 

259.8 

2760 

285.0 

282.8 

280.6 

278.5 

276.4 

274-4 

272.3 

270.3 

268.4 

264.5 

260.7 

2770 

286.0 

283.8 

281.7 

279-5 

277.4 

275-4 

273-3 

271.3 

269.3 

265-5 

261.6 

2780 

287.0 

284.8 

282.7 

280.5 

278.4 

276.4 

274-3 

272.3 

2/0.3 

266.4 

262.6 

2790 

288.1 

285.9 

283.7 

281.5 

279-4 

277.4 

275.3 

273-3 

271.3 

267.4 

263.5 

2800 

289.1 

286.9 

284.7 

282.6 

280.4 

278.3 

276.3 

274-3 

272.2 

268.3 

264.5 

2810 

290.1 

287.9 

285.7 

283.6 

281.4 

279-3 

277.3 

275.2 

273-2 

269.3 

265.4 

2820 

291.2 

288.9 

286.7 

284.6 

282.4 

280.3 

278.3 

276.2 

274.2 

270.3 

266.4 

2830 

292.2 

290.0 

287.8 

285.6 

283.4 

281.3 

279.2 

277.2 

275.2 

271.2 

267.3 

2840 

293.2 

291.0 

288.8 

286.6 

284.4 

282.3 

280.2 

278.2 

276.1 

272.2 

268.3 

2850 

294.3 

292.0 

289.8 

287.6 

285.4 

283.3 

281.2 

279.2 

277.1 

273.1 

269.2 

2860 

295.3 

293.0 

290.8 

288.6 

286.4 

284.3 

282.2 

280.1 

278.1 

274.1 

270.1 

1  2870 

296.3 

294.1 

291.8 

289.6 

287.4 

285.3 

283.2 

281.1 

279.0 

275-0 

271.1 

i   2880 

297.4 

295-1 

292.8 

290.6 

288.4 

286.3 

284.2 

282.1 

280.0 

276.0 

272.0 

2890 

298.4 

296.1 

293.8 

291.6 

289.4 

287.3 

285.2 

283.1 

281.0 

277.0 

273-0 

2900 

299.4 

297.1 

294.9 

292.6 

290.4 

288.3 

286.2 

284.1 

282.0 

277.9 

273-9 

2910 

300.4 

298.1 

295-9 

293-7 

291-5 

289-3 

287.1 

285.0 

282.9 

278.9 

274.9 

2920 

30L5 

299.2 

296.9 

294.7 

292.5 

290.3 

288.1 

286.0 

283.9 

279-8 

275-8 

2930 

302.5 

300.2 

297.9 

295-7 

293-5 

291.3 

289.1 

287.0 

284.9 

280.8 

276.8 

2940 

303.5 

301.2 

298.9 

296.7 

294-5 

292.3 

290.1 

288.0 

285.9 

281.8 

277.7 

2950 

304.6 

302.2 

299.9 

297.7 

295.5 

293-3 

291.1 

289.0 

286.8 

282.7 

278.6 

2960 

305-6 

303.3 

301.0 

298.7 

296.5 

294.2 

292.1 

289.9 

287.8 

283.7 

279.6 

2970 

306.6 

304-3 

302.0 

299-7 

297-5 

295.2 

293.1 

290.9 

288.8 

284.6 

280.5 

2980 

307.7 

305.3 

303-0 

300.7 

298.5 

296.2 

294.0 

291.9 

289.7 

285.6 

281.5 

2990 

308.7 

306.3 

304-0 

301.7 

299-5 

297.2 

295.0 

292.9 

290.7 

286.5 

282.4 

3000 

309-7 

3074 

305-0 

302.7 

300.5 

298.2 

296.0 

293.8 

291.7 

287.5 

283.4 

SMITHSONIAN  TABLES. 


TABLE  18. 

REDUCTION    OF    THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Correction   of   20OO  m   for   Latitude:    2000  m  x  0.002662  cos  2  <f>. 

For  latitudes  o°  to  45°,  the  correction  is  to  be  subtracted. 
For  latitudes  45°  to  90°,  the  correction  is  to  be  added. 


LATITUDE- 

2000  ro. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

10 

o.o 

0.0 

0.0 

0.0 

o.o 

o.o 

o.o 

o.o 

0.0 

o.o 

20 

O.I 

O.I 

O.I 

o.o 

o.o 

o.o 

o.o 

o.o 

o.o 

o.o 

30 

O.I 

O.I 

O.  I 

O.I 

O.I 

O.I 

o.o 

o.o 

0.0 

o.o 

40 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

o.o 

50 

O.I 

O.I 

O.I 

O.I 

O.I 

O.I 

O.  I 

0.0 

0.0 

o.o 

60 

O.2 

O.2 

O.2 

O.  I 

O.I 

O.I 

O.  I 

O.I 

o.o 

o.o 

70 

0.2 

0.2 

0.2 

0.2 

O.I 

O.I 

O.I 

O.I 

0.0 

0.0 

80 

O.2 

O.2 

O.2 

O.2 

0.2 

O.  I 

O.I 

O.I 

o.o 

o.o 

90 

0.2 

0.2 

0.2 

0.2 

O.2 

0.2 

O.I 

O.I 

0.0 

0.0 

IOO 

0-3 

0-3 

0.3 

0.2 

0.2 

O.2 

O.I 

O.I 

o.o 

0.0 

no 

o-3 

0-3 

0-3 

0-3 

O.2 

O.2 

O.I 

O.I 

O.I 

o.o 

1  20 

0.3 

0-3 

0.3 

0-3 

0.2 

0.2 

0.2 

O.I 

O.I 

0.0 

130 

0.3 

°-3 

o-3 

o-3 

0-3 

0.2 

O.2 

O.I 

O.I 

o.o 

140 

0.4 

0.4 

0.4 

o-3 

0-3 

O.2 

0.2 

O.I 

O.I 

0.0 

150 

0.4 

0.4 

0.4 

0.3 

0-3 

0-3 

0.2 

O.I 

O.I 

0.0 

1  60 

0.4 

0.4 

0.4 

0.4 

0-3 

0-3 

O.2 

O.I 

O.I 

o.o 

170 

o-5 

0.4 

0.4 

0.4 

0-3 

o-3 

0.2 

O.2 

O.I 

0.0 

1  80 

0.5 

0-5 

0.5 

0.4 

0.4 

o-3 

O.2 

0.2 

O.I 

0.0 

190 

0.5 

0-5 

o-5 

0.4 

0.4 

o-3 

0-3 

O.2 

O.I 

o.o 

200 

0.5 

0-5 

0-5 

0.5 

0.4 

0.3 

0.3 

0.2 

O.I 

o.o 

2IO 

0.6 

0.6 

0-5 

0-5 

0.4 

0.4 

0-3 

O.2 

O.I 

0.0 

22O 

0.6 

0.6 

0.6 

o-5 

0.4 

0.4 

0-3 

0.2 

O.I 

o.o 

230 

0.6 

0.6 

0.6 

0.5 

0.5 

0.4 

0-3 

O.2 

O.I 

0.0 

240 

0.6 

0.6 

0.6 

0.6 

0.5 

0.4 

0-3 

0.2 

O.I 

0.0 

250 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

°-3 

O.2 

O.I 

0.0 

260 

0.7 

0.7 

0.7 

0.6 

0.5 

0.4 

0.3 

0.2 

O.I 

o.o 

270 

0.7 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

O.2 

O.I 

0.0 

280 

0.7 

0.7 

0.7 

0.6 

0.6 

0.5 

0.4 

0-3 

O.I 

o.o 

290 

0.8 

0.8 

0.7 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

o.o 

300 

0.8 

0.8 

0.8 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

o.o 

310 

0.8 

0.8 

0.8 

0.7 

0.6 

0.5 

0.4 

0-3 

O.I 

0.0 

320 

0.9 

0.8 

0.8 

0.7 

0.7 

0.5 

0.4 

0-3 

O.I 

0.0 

33° 

0.9 

0.9 

0.8 

0.8 

0.7 

0.6 

0.4 

0-3 

O.2 

o.o 

340 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0.5 

0-3 

0.2 

0.0 

350 

0.9 

0.9 

0.9 

0.8 

0.7 

0.6 

0.5 

0-3 

0.2 

0.0 

90° 

85° 

80° 

75° 

70° 

65° 

60° 

55° 

50° 

45° 

SMITHSONIAN  TABIFS. 


90 


TABLE  19. 


REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Bo- B=  8(10^-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


2000m. 

HEIGHT  OF  THE  BAROMETER  IN   MILLIMETRES. 

790 

780 

770 

760 

750 

740 

730 

720 

710 

700 

690 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

| 

0.9 

0.9 

0.9 

0.9 

0.9 

0.9 

0.8 

0.8 

0.8 

0.8 

0.8 

2 

1.8 

1.8 

1.8 

1.8 

i-7 

1-7 

1-7 

i-7 

1.6 

1.6 

1.6 

3 

2.7 

2.7 

2-7 

2.6 

2.6 

2.6 

2-5 

2.5 

2-5 

2.4 

2-4 

4 

3-6 

3.6 

3-6 

3.5 

3-5 

3.4 

3.4 

3-3 

3-3 

3-2 

3-2 

5 

4.6 

4.5 

4-4 

4.4 

4-3 

4-3 

4-2 

4.2 

4.1 

4.0 

4.0 

6 

5-5 

5-4 

5-3 

5-3 

5-2 

5-i 

5-1 

5-0 

4-9 

4-9 

4.8 

7 

6.4 

6.3 

6.2 

6.1 

6.1 

6.0 

5.9 

5-8 

5-7 

5.7 

5.6 

8 

7-3 

7.2 

7.i 

7.0 

6.9 

6.8 

6.8 

6.7 

6.6 

6.5 

6.4 

9 

8.2 

8.1 

8.0 

7.9 

7-8 

7.7 

7-6 

7-5 

7-4 

7-3 

7.2 

10 

9-i 

9.0 

8.9 

8.8 

8-7 

8.6 

8-5 

8.3 

8.2 

8.1 

8.0 

ii 

10.  1 

9-9 

9.8 

9-7 

9-6 

9-4 

9.3 

9-2 

9.0 

8.9 

8.8 

12 

II.  0 

10.9 

10.7 

10.6 

10.4 

10.3 

10.2 

10.  0 

9-9 

9-7 

9.6 

13 

IX.Q 

ii.  8 

ii.  6 

II-5 

H.3 

II.  2 

II.  0 

10.9 

10.7 

10.6 

10.4 

14 

12.8 

12.7 

12.5 

12.3 

12.2 

12.0 

II.9 

ii.  7 

ii-5 

11.4 

II.  2 

15 

13.8 

13-6 

13-4 

13.2 

I3-I 

12.9 

12.7 

12.5 

12.4 

12.2 

12.0 

16 

14.7 

14.5 

14.3 

14.1 

13-9 

13.8 

13-6 

13.4 

13-2 

13.0 

12.8 

17 

15.6 

15-4 

15.2 

15.0 

14.8 

14.6 

14.4 

14.2 

14.0 

13.8 

13-6 

18 

16.5 

16.3 

16.1 

15.9 

15-7 

15.5 

15-3 

15.1 

14.9 

14.7 

J4.4 

19 

17.5 

17-3 

17.0 

16.8 

16.6 

16.4 

16.1 

15.9 

15-7 

15.5 

!5.3 

20 

18.4 

18.2 

17.9 

17.7 

17.5 

17.2 

17.0 

16.8 

16.5 

I6.3 

16.1 

21 

19-3 

19.1 

18.8 

18.6 

18.4 

18.1 

17.9 

17.6 

17.4 

I7.I 

16.9 

22 

20.  o 

19.8 

19-5 

19.2 

19.0 

18.7 

18.5 

18.2 

18.0 

17.7 

23 

20.9 

20.7 

20.4 

20.1 

19.9 

19.6 

19.3 

19.1 

18.8 

18.5 

24 

21.9 

21.6 

21.3 

21.0 

20.7 

20.5 

20.2 

19.9 

19.6 

19-3 

25 

22.8 

22.5 

22.2 

21.9 

21.6 

21.3 

21.0 

20.7 

20.4 

20.1 

26 

23-7 

23-4 

23.1 

22.8 

22.5 

22.2 

21.9 

21.6 

21.3 

21.0 

27 

24.6 

24-3 

24.0 

23.7 

23.4 

23.0 

22.7 

22.4 

22.1 

21.8 

28 

25.6 

25.2 

24.9 

24.6 

24.2 

23-9 

23.6 

23.3 

22.9 

22.6 

29 

26.5 

26.1 

25.8 

25-5 

25.1 

24.8 

244 

24.1 

23.8 

23.4 

30 

27.4 

27.1 

26.7 

26.4 

26.0 

25-7 

25-3 

25.0 

24.6 

24.2 

3i 

28.3 

28.0 

27.6 

27.3 

26.9 

26.5 

26.2 

25.8 

25-4 

25.1 

32 

29-3 

28.9 

28.5 

28.1 

27.8 

27.4 

27.0 

26.6 

26.3 

25-9 

33 

30.2 

29.8 

29.4 

29.0 

28.7 

28.3 

27.9 

27.5 

27.1 

26.7 

34 

30-7 

30.3 

29-9 

29.5 

29.1 

28.7 

28.3 

27.9 

27-5 

35 

31,7 

31.2 

30.8 

30-4 

30.0 

29.6 

29.2 

28.8 

28.4 

36 

32.6 

32.2 

31-7 

31.3 

30.9 

30.5 

30.0 

29.6 

29.2 

37 

33-5 

33-1 

32.6 

32.2 

31-8 

3L3 

30.9 

30-5 

30.0 

38 

34-4 

34-0 

33-5 

33.1 

32-6 

32.2 

31.8 

31.3 

30.9 

39 

35-4 

34-9 

34-4 

34-0 

33-5 

33-i 

32.6 

32.1 

31-7 

40 

36.3 

35-8 

35-3 

34-9 

34-4 

33-9 

33-5 

33-0 

32.5 

SMITHSONIAN  TABLES. 


TABLE    19. 

REDUCTION    OF    THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Bo-B=B(10w-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000m. 

HEIGHT   OF  THE  BAROMETER   IN  MILLIMETRES. 

760 

750 

740 

730 

720 

710 

700 

690 

680 

670 

660 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

40 

35-8 

35-3 

34.9 

34-4 

33-9 

33-5 

33-o 

32.5 

32.0 

31-6 

3I-I 

4i 

36.7 

36.3 

35.8 

35-3 

34.8 

34-3 

33-8 

33-4 

32.9 

32.4 

31-9 

42 

37-7 

37-2 

36.7 

36.2 

35-7 

35-2 

34-7 

34.2 

33,7 

33-2 

32.7 

43 

38.6 

38.1 

37-6 

37-0 

36.5 

36.0 

35-5 

35-0 

34-5 

34-o 

33.5 

44 

39-5 

39-0 

38.5 

37-9 

37-4 

36.9 

36-4 

35-9 

35-3 

34-8 

34-3 

45 

40.4 

39-9 

39.3 

38.8 

38.3 

37-8 

37-2 

36.7 

36.2 

35-6 

35-1 

46 

41-3 

40.8 

40.2 

39-7 

39-2 

38.6 

38.1 

37-5 

37-0 

36.4 

35-9 

47 

42-3 

41.7 

41.1 

40.6 

40.0 

39-5 

38.9 

38.4 

37-8 

37-3 

36.7 

48 

43-2 

42.6 

42.0 

4i.5 

40.9 

40.3 

39-8 

39-2 

38.6 

38.1 

37-5 

49 

44.1 

43-5 

42.9 

42.4 

41.8 

41.2 

40.6 

40.0 

39-5 

38.9 

38.3 

50 

45-0 

44-4 

43-8 

43-3 

42.7 

42.1 

41-5 

40.9 

40-3 

39-7 

39-  1 

5i 

46.0 

45.4 

44.8 

44.1 

43-5 

42.9 

42.3 

41.7 

41.1 

40.5 

39-9 

52 

46.9 

46.3 

45.7 

45-0 

44-4 

43-8 

43-2 

42.6 

42.0 

4i.3 

40.7 

53 

47-8 

47.2 

46.6 

45-9 

45-3 

44.7 

44.o 

43-4 

42.8 

42.2 

4L5 

54 

48.7 

48.1 

47-5 

46.8 

46.2 

45-5 

44-9 

44-3 

43.6 

43-0 

42-3 

55 

49-7 

49.0 

48.4 

47-7 

47.1 

46.4 

45-8 

45-1 

44-5 

43-8 

43«i 

56 

50.6 

49.9 

49-3 

48.6 

47.9 

47.3 

46.6 

46.0 

45-3 

44-6 

44.0 

57 

5i-5 

50.9 

50.2 

49-5 

48.8 

48.2 

47-5 

46.8 

46.1 

45-4 

44.8 

58 

52.5 

51-8 

5i.i 

50.4 

49-7 

49.0 

48.3 

47-6 

47.0 

46.3 

45-6 

59 

53-4 

52.7 

52-0 

5L3 

50.6 

49-9 

49-2 

48.5 

47-8 

47.i 

46.4 

60 

53-6 

52.9 

52.2 

51.5 

50.8 

50.1 

49-3 

48.6 

47-9 

47-2 

61 

54-6 

53-8 

53-i 

52.4 

51-7 

50.9 

50.2 

49-5 

48.7 

48.0 

62 

55-5 

54-8 

54-0 

53-3 

52.5 

51-8 

51-1 

50.3 

49.6 

48.8 

63 

56.4 

55-7 

54-9 

54-2 

53-4 

52.7 

51-9 

51-2 

50.4 

49-6 

64 

57-3 

56.6 

55-8 

55-1 

54-3 

53-5 

52.8 

52.0 

51-2 

50.5 

65 

58.3 

57-5 

56.7 

55-9 

55-2 

54-4 

53-6 

52.8 

52-1 

51-3 

66 

59.2 

58.4 

57-6 

56.8 

56.1 

55-3 

54-5 

53-7 

52.9 

52.1 

67 

60.  i 

59-3 

58.5 

57.7 

56.9 

56.1 

55-3 

54-5 

53-7 

52.9 

68 

60.3 

59-4 

58.6 

57-8 

57-0 

56.2 

55.4 

54-6 

53-7 

69 

61.2 

60.4 

59-5 

58.7 

57.9 

57-0 

56.2 

55-4 

54.6. 

70 

62.1 

61.3 

60.4 

59-6 

58.7 

57-9 

57-1 

56.2 

55-4 

71 

63.0 

62.2 

61.3 

60.5 

59-6 

58.8 

57-9 

57-1 

56.2 

72 

64.0 

63.1 

62.2 

61.4 

60.5 

59-6 

58.8 

57-9 

57-0 

73 

64.9 

64.0 

63-1 

62.3 

61.4 

60.5 

59-6 

58.7 

57.9 

74 

65.8 

64.9 

64.0 

63-1 

62.3 

61.4 

60.5 

59-6 

58.7 

75 

66.7 

65.8 

64.9 

64.0 

63.1 

62.2 

61.3 

60.4 

59-5 

76 

67.7 

66.8 

65-8 

64.9 

64.0 

63-1 

62.2 

61.3 

60.4 

77 

68.6 

67.7 

66.7 

65-8 

64.9 

64.0 

63.0 

62.1 

61.2 

78 

69.5 

68.6 

67.6 

66.7 

65-8 

64.8 

63-9 

63.0 

62.0 

79 

70.5 

69.5 

68.6 

67.6 

66.7 

65.7 

64.7 

63.8 

62.8 

80 

70.4 

69.5 

68.5 

67-5 

66.6 

65.6 

64.6 

63.7 

81 

71.4 

70.4 

69.4 

68.4 

67.4 

66.5 

65.5 

64-5 

82 

72.3 

71-3 

70.3 

69.3 

68.3 

67-3 

66.3 

65-3 

83 

73-2 

72.2 

71.2 

70.2 

69.2 

68.2 

67.2 

66.2 

84 

74.1 

73-1 

72.1 

71.1 

70.! 

69.0 

68.0 

67.0 

85 

75-0 

74-0 

73-0 

72.0 

70.9 

69.9 

68.9 

67.9 

SMITHSONIAN  TABLES. 


92 


REDUCTION    OF   THE     BAROMETER    TO    SEA 

METRIC    MEASURES. 
B0-B=B(10W-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


TABLE 
LEVEL. 


19. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

720 

710 

700 

690 

680 

670 

660 

650 

640 

630 

80 

mm. 
69.5 

mm. 
68.5 

mm. 
67.5 

mm. 
66.6 

mm. 
65.6 

mm. 
64.6 

mm. 

63.7 

mm. 
62.7 

mm. 
61.7 

mm. 
60.8 

Si 

70.4 

69.4 

68.4 

67.4 

66.5 

65.5 

63.5 

62.6 

61.6 

82 

71-3 

70.3 

69.3 

68.3 

67.3 

66.3 

65.3 

64.4 

63.4 

62.4 

83 

72.2 

71.2 

70.2 

69.2 

68.2 

67.2 

66.2 

65-2 

64.2 

63-2 

84 

72.1 

7I.I 

70.1 

69.0 

68.0 

67.0 

66.0 

65.0 

64.0 

85 

74-o 

73-0 

72.0 

70.9 

69.9 

68.9 

67.9 

66.8 

65.8 

64.8 

86 

74-9 

73-9 

72.9 

71.8 

70.8 

69.7 

68.7 

67.7 

66.6 

65.6 

S/ 

75-9 

74-8 

73-7 

72-7 

71.6 

70.6 

69-5 

68.5 

67.4 

66.4 

88 

76.8 

75.7 

74.6 

73-6 

72-5 

71.4 

70.4 

69.3 

68.2 

67.2 

89 

77-7 

76.6 

75.5 

74-5 

73-4 

72-3 

71.2 

70.1 

69.1 

68.0 

90 

78.6 

77-5 

76.4 

75-3 

74.2 

73-1 

72.1 

71.0 

69.9 

68.8 

91 

79.5 

78.4 

77-3 

76.2 

75-1 

74.o 

72.9 

71.8 

70.7 

69.6 

92 

80.4 

79-3 

78.2 

77.1 

76.0 

74-9 

73-7 

72.6 

7L5 

70.4 

93 

81.4 

80.2 

79.1 

78.0 

76.8 

75-7 

74.6 

73-5 

72.3 

71.2 

94 

82.3 

81.1 

80.0 

78.9 

77.7 

76.6 

75-4 

74-3 

73.1 

72.0 

95 

83.2 

82.1 

80.9 

79-7 

78.6 

77-4 

76.3 

75.1 

74-0 

72.8 

96 

84.1 

83.0 

81.8 

80.6 

79-5 

78.3 

77.1 

76.0 

74-8 

73-6 

97 

85.1 

83-9 

82.7 

81.5 

80.3 

79.2 

78.0 

76.8 

75-6 

74-4 

98 

86.0 

84.8 

83-6 

82.4 

81.2 

80.0 

78.8 

77-6 

76.4 

75.2 

99 

86.9 

85-7 

84.5 

83.3 

82.1 

80.9 

79.7 

78.5 

77-3 

76.1 

100 

87.9 

86.6 

85-4 

84.2 

83-0 

81.8 

80.5 

79.3 

78.1 

76.9 

IOI 

88.8 

87.6 

86.3 

85-1 

83.9 

82.6 

81.4 

80.2 

78.9 

77-7 

102 

89.7 

88.5 

87.2 

86.0 

84.7 

83.5 

82.2 

81.0 

79-7 

78-5 

103 

90.6 

89.4 

88.1 

86.9 

85-6 

84.4 

83.1 

81.8 

80.6 

79-3 

104 

90.3 

89.0 

87.8 

86.5 

85.2 

84.0 

82.7 

81.4 

80.  i 

105 

91.2 

89.9 

88.7 

87.4 

86.1 

84.8 

83.5 

82.2 

81.0 

106 

92.2 

90.9 

89.6 

88.3 

87.0 

85.7 

84.4 

83.1 

81.8 

107 

91.8 

90.5 

89.1 

87.8 

86.5 

85.2 

83-9 

82.6 

108 

94.0 

92.7 

91.4 

90.0 

88.7 

87.4 

86.1 

84.7 

83-4 

109 

94-9 

93-6 

92-3 

90.9 

89.6 

88.2 

86.9 

85.6 

84.2 

110 

95-9 

94-5 

93-2 

91.8 

90.5 

89.1 

87.8 

86.4 

85.1 

in 

96.8 

95.4 

94-1 

92.7 

91-3 

90.0 

88.6 

87.2 

85-9 

112 

97-7 

96.3 

95-0 

93-6 

92.2 

90.8 

89.5 

88.1 

86.7 

"3 

98.6 

97-3 

95-9 

94.5 

93-1 

91.7 

90.3 

88.9 

87.5 

114 

99-6 

98.2 

96.8 

95-4 

94-0 

92.6 

91.2 

89.8 

88.4 

115 

100.5 

99.1 

97.7 

96.3 

94-8 

93-4 

92.0 

90.6 

89.2 

116 

100.0 

98.6 

97-2 

94-3 

92.9 

91.4 

90.0 

117 

100.9 

99-5 

98.1 

96.6 

95.2 

93-7 

92-3 

90.8 

118 

101.9 

100.4 

98.9 

97-5 

96.0 

94.6 

93-1 

91.7 

119 

IO2.8 

101.3 

99.8 

98.4 

96.9 

95.4 

94.0 

92.5 

120 

103.7 

102.2 

100.7 

99-3 

97-8 

96.3 

94.8 

93-3 

121 

104.6 

I03.I 

101.  6 

IOO.I 

98.7 

97.2 

95-7 

94.2 

122 

105.6 

I04.I 

102.5 

IOI.O 

99-5 

98.0 

96.5 

95-0 

123 

106.5 

105.0 

103-4 

101.9 

100.4 

98.9 

97-4 

95.8 

124 

107.4 

105.9 

104.3 

102.8 

101.3 

99-7 

98.2 

96.7 

125 

108.3 

106.8 

105.3 

103.7 

102.2 

100.6 

99.1 

97-5 

SMITHSONIAN  TABLES. 


93 


TABLE  19. 

REDUCTION 


OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Bo-B=B(10w-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN   MILLIMETRES. 

690 

680 

670 

660 

650 

640 

630 

620 

610 

600 

1  25 

mm. 
106.8 

mm. 
105-3 

mm. 
103.7 

mm. 
102.2 

mm. 
100.6 

mm. 
99.1 

mm. 
97-5 

mm. 
96.0 

mm. 
94-4 

mm. 
92.9 

126 

107.7 

1  06.  2 

104.6 

103.0 

101.5 

99-9 

98.4 

96.8 

95-2 

93-7 

127 

108.6 

I07.I 

105-5 

103.9 

102.3 

100.8 

99.2 

97.6 

96.0 

94-5 

128 

109.6 

108.0 

106.4 

104.8 

103.2 

101.6 

100.0 

98.4 

96.9 

95.3 

129 

110.5 

108.9 

107.3 

105-7 

104.1 

102.5 

100.9 

99-3 

97-7 

96.1 

130 

111.4 

109.8 

108.2 

106.6 

104.9 

103.3 

101.7 

100.  1 

98.5 

96-9 

I31 

112.3 

II0.7 

109.1 

107.4 

105.8 

104.2 

IO2.6 

IOO.9 

99-3 

97.7 

132 

113.2 

in.  6 

IIO.O 

108.3 

106.7 

105.0 

103.4 

101.8 

100.  1 

98.5 

133 

114.2 

112.5 

110.9 

109.2 

107.6 

105.9 

104.2 

102.6 

100.9 

99-3 

134 

115-1 

II3-4 

in.  8 

IIO.  I 

108.4 

106.8 

105.1 

103.4 

101.8 

100.  1 

135 

116.0 

II4-3 

112.7 

III.O 

109.3 

107.6 

105.9 

104.3 

102.6 

100.9 

136 

117.0 

II5-3 

113.6 

111.9 

II0.2 

108.5 

106.8 

105.1 

103.4 

101.7 

137 

117.9 

116.2 

II4-5 

112.  8 

III.  I 

109.3 

107.6 

105.9 

104.2 

102.5 

138 

118.8 

117.1 

II5-4 

113.6 

III.9 

1  10.  2 

108.5 

106.8 

105.0 

103.3 

139 

119.7 

118.0 

116.3 

114.5 

II2.8 

III.  I 

109.3 

107.6 

105-9 

104.1 

140 

120.7 

118.9 

117.2 

115.4 

II3-7 

III.9 

IIO.  2 

108.4 

106.7 

104.9 

141 

121.  6 

119.9 

118.1 

116.3 

Ii4.6 

II2.8 

III.O 

I09-3 

107.5 

105.8 

142 

120.8 

119.0 

117.2 

II5-4 

113.7 

III.9 

1  10.  1 

108.3 

106.6 

143 

121.  7 

119.9 

118.1 

II6.3 

114.5 

II2.7 

III.O 

109.2 

107.4 

144 

122.6 

120.8 

119.0 

II7.2 

115.4 

II3.6 

in.  8 

IIO.O 

108.2 

145 

123.5 

121.7 

119.9 

II8.I 

116.3 

II4-5 

112.  6 

1  10.  8 

109.0 

146 

124.5 

122.6 

120.8 

II9.O 

117.1 

II5-3 

II3-5 

in.  7 

109.8 

147 

125.4 

123.6 

121.  7 

II9.9 

118.0 

116.2 

H4.3 

112.5 

110.6 

148 

126.3 

124-5 

122.6 

I2O.7 

118.9 

117.0 

115.2 

U3.3 

111.5 

149 

127.3 

125.4 

123.5 

121.  6 

119.8 

117.9 

116.0 

114.2 

112.3 

150 

128.2 

126.3 

124.4 

122.5 

120.6 

118.8 

116.9 

115.0 

113.1 

151 

129.1 

127.2 

125.3 

123.4 

121.  5 

119.6 

117.7 

115.8 

II3-9 

152 

130.0 

I28.I 

126.2 

124.3 

122.4 

120.5 

118.6 

116.7 

114.7 

153 

131.0 

I29.I 

127.1 

125.2 

123.3 

121.3 

119.4 

H7.5 

115.6 

154 

130.0 

128.0 

126.1 

124.2 

122.2 

120.3 

118.3 

116.4 

155 

130.9 

128.9 

127.0 

125.0 

I23.I 

121.  1 

119.2 

117.2 

156 

I3I.8 

129.8 

127.9 

125.9 

123.9 

122.0 

I2O.O 

118.0 

157 

132.7 

130.8 

128.8 

126.8 

124.8 

122.8 

I2O.9 

118.9 

158 

133-7 

131.7 

129.7 

127.7 

125.7 

123.7 

I2I.7 

119.7 

159 

134.6 

132.6 

130.6 

128.6 

126.6 

124.5 

122.5 

120.5 

160 

135-5 

133.5 

131.5 

129.4 

127-4 

125.4 

123.4 

121.4 

161 

136.4 

134.4 

132.4 

130.3 

128.3 

126.3 

124.2 

122.2 

162 

137-4 

T35.3 

133.3 

131.2 

129.2 

I27.I 

I25.I 

123.0 

163 

138.3 

136.2 

134.2 

132.1 

130.0 

128.0 

125.9 

123.9 

164 

139.2 

137.2 

135.1 

133.0 

130.9 

128.8 

126.8 

124-7 

165 

I4O.2 

138.1 

136.0 

133.9 

I3I.8 

129.7 

127.6 

125.5 

166 

I4I.I 

139.0 

136.9 

134.8 

132.7 

130.6 

128.5 

126.4 

167 

142.0 

139-9 

137.8 

135.7 

133-6 

I3M 

129.3 

127.2 

1  68 

140.8 

138.7 

136.6 

134-4 

132.3 

130.2 

128.0 

169 

141.8 

139.6 

137.5 

135.3 

133.2 

I3I.O 

128.9 

170 

142.7 

140.5 

138.4 

136.2 

134.0 

I3I.9 

129.7 

SMITHSONIAN  TABLES. 


94 


TABLE  19. 

REDUCTION    OF   THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 

Bo-  B  =  B  (10;w-1>. 

Top  argument :     Height  of  the  barometer  (B). 
Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MILLIMETRES. 

650 

640 

630 

620 

610 

600 

590 

580 

570 

560 

(70 

mm. 
140.5 

mm. 
138.4 

mm. 
136.2 

mm. 
134.0 

mm. 
I3L9 

mm. 
129.7 

mm. 
127.5 

mm. 
125.4 

mm. 
123.2 

mm. 
121.  1 

171 

141.4 

139-3 

I37-I 

134-9 

132.7 

130.6 

128.4 

126.2 

124.0 

121.  8 

172 

142.3 

140.2 

138.0 

135.8 

133-6 

I3I.4 

129.2 

127.0 

124.8 

122.6 

173 

143-3 

I4I.I 

138.8 

136.6 

134.4 

132.2 

130.0 

127.8 

125.6 

123.4 

174 

144.2 

142.0 

139.7 

137.5 

135-3 

I33-I 

130.9 

128.6 

126.4 

124.2 

175 

I45-I 

142.9 

140.6 

138.4 

136.2 

133.9 

I3L7 

129.5 

127.2 

125.0 

176 

146.0 

143.8 

I4I.5 

139.3 

137.0 

134.8 

132.5 

130.3 

128.0 

125.8 

177 

146.9 

144.7 

142.4 

I40.I 

137.9 

I35.6 

!33-4 

131.1 

128.8 

126.6 

178 

147.8 

145.6 

143.3 

141.0 

138.7 

136.5 

134-2 

I3L9 

129.6 

127.4 

179 

148.8 

146.5 

144-2 

I4I.9 

139.6 

137-3 

135.0 

132.7 

130.4 

128.2 

180 

149.7 

147.4 

I45.I 

142.8 

140.5 

138.2 

135.9 

133.6 

I3I.3 

129.0 

181 

150.6 

148.3 

146.0 

143.6 

I4L3 

139.0 

136.7 

134-4 

I32.I 

129.7 

182 

I5I.5 

149.2 

146.9 

144.5 

142.2 

139.9 

137.5 

135-2 

132.9 

130.5 

183 

152.4 

•I50.I 

147.8 

145-4 

I43.I 

140.7 

138.4 

136.0 

133-7 

I3L3 

184 

153-4 

I5I.O 

148.6 

146.3 

143.9 

I4I.6 

139.2 

136.8 

134.5 

I32.I 

185 

154-3 

I5I.9 

149-5 

147.2 

144.8 

142.4 

140.0 

137.7 

135-3 

132.9 

186 

155.2 

152.8 

150.4 

148.1 

H5.7 

143-3 

140.9 

138.5 

136.1 

133.7 

187 

156.1 

153-7 

I5L3 

148.9 

146.5 

I44.I 

141.7 

139.3 

136.9 

134.5 

188 

I57.I 

154-7 

152.2 

149.8 

147.4 

145.0 

142.6 

140.2 

137.7 

J35.3 

189 

158.0 

155-6 

I53-I 

150.7 

148.3 

145.8 

143.4 

141.0 

138.6 

136.1 

190 

158.9 

156.5 

154.0 

I5I.6 

149.2 

146.7 

144-3 

141.8 

139.4 

136.9 

191 

J59-9 

157.4 

154.9 

152.5 

150.0 

147.6 

I45.I 

142.7 

140.2 

137.7 

192 

160.8 

158.3 

155.9 

153-4 

150.9 

148.4 

146.0 

143.5 

I4I.O 

138.5 

193 

161.7 

159.2 

156.8 

154.3 

I5I.8 

149.3 

146.8 

144.3 

141.8 

139.3 

194 

l6o.2 

157.7 

155-2 

152.7 

150.2 

147.7 

145-2 

142.6 

140.1 

195 

161.1 

158.6 

156.1 

153-5 

I5I.O 

148.5 

146.0 

143.5 

141.0 

196 

162.0 

159.5 

156.9 

154.4 

I5I.9 

149.4 

146.8 

144.3 

141.8 

197 

162.9 

160.4 

157.8 

155.3 

152.8 

150.2 

147.7 

I45-I 

142.6 

198 

163.9 

161.3 

158.7 

156.2 

153.6 

151-1 

148.5 

145-9 

143-4 

199 

164.8 

162.2 

159.6 

I57.I 

154.5 

I5L9 

149.3 

146.8 

144.2 

200 

2OI 

165.7 
166.6 

163.1 
164.0 

160.5 
161.4 

157.9 
158.8 

155.4 
156.2 

152.8 
153.6 

150.2 
151.0 

147.6 
148.4 

145.0 
145-8 

2O2 

167.6 

165.0 

162.3 

159-7 

I57.I 

154.5 

151.9 

149.2 

146.6 

203 

168.5 

165.9 

163.2 

160.6 

158.0 

155.3 

152.7 

I50.I 

147.4 

204 

169.4 

166.8 

164.1 

161.5 

158.8 

156.2 

153.5 

150.9 

148.3 

205 

170.4 

167.7 

165.0 

162.4 

159-7 

I57-I 

154.4 

I5L7 

149.1 

206 

171-3 

168.6 

165.9 

163-3 

160.6 

157.9 

155.2 

152.6 

149.9 

207 

172.2 

169.5 

166.8 

164.2 

161.5 

158.8 

156.1 

153.4 

150.7 

208 

170.5 

167.8 

165.1 

162.3 

159.6 

156.9 

154.2 

I5L5 

209 

171.4 

168.7 

165.9 

163.2 

160.5 

157.8 

I55.I 

152.3 

210 

172.3 

169.6 

166.8 

164.1 

161.4 

158.6 

155-9 

153-2 

211 

173.2 

170.5 

167.7 

165.0 

162.2 

159.5 

156.7 

154.0 

212 

174.2 

I7I.4 

168.6 

165.9 

163.1 

160.3 

157-6 

154.8 

213 

I75.I 

172.3 

169.5 

166.7 

164.0 

161.2 

158.4 

155-6 

214 

176.0 

173-2 

170.4 

167.6 

164.8 

162.0 

159.2 

156.5 

215 

176.9 

I74.I 

I7I.3 

168.5 

165.7 

162.9 

160.1 

157.3 

SMITHSOIilAN  TABIK8. 


95 


TABLE  19 


REDUCTION    OF  THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
Bo-B=  B(1Cr-1). 

Top  argument:     Height  of  the  barometer   (B). 

Side  argument:     Values  of  2000  m  obtained  from  Table  17. 


2000  m. 

HEIGHT  OF  THE   BAROMETER   IN   MILLIMETRES. 

620 

610 

600 

590 

580 

570 

560 

550 

540 

530 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

2I5 

I74.I 

I7I.3 

168.5 

165.7 

162.9 

1  60.  1 

157.3 

154-5 

I5I-7 

148.9 

216 

175.0 

172.2 

169.4 

166.6 

163.8 

160.9 

I58.I 

155.3 

152.5 

149.6 

217 

176.0 

I73.I 

170.3 

167.4 

164.6 

161.8 

158.9 

156.1 

153-3 

150.4 

218 

176.9 

174.0 

I7I.2 

168.3 

165.5 

162.6 

159.8 

156.9 

I54-I 

I5I.2 

219 

177-8 

174-9 

I72.I 

169.2 

166.3 

I63-5 

160.6 

157.7 

154-9 

152.0 

220 

178.7 

175-8 

172.9 

170.1 

167.2 

164-3 

161.4 

158.5 

155.7 

152.8 

221 

179.6 

176.7 

173.8 

170.9 

168.0 

165.1 

162.3 

J59-4 

156.5 

153-6 

222 

180.6 

177.6 

174.7 

171.8 

168.9 

166.0 

163.1 

160.2 

157-3 

J54-3 

223 

181.5 

178.6 

175.6 

172.7 

169.8 

166.8 

163.9 

161.0 

158.1 

I55-I 

224 

182.4 

179-5 

176.5 

173.6 

170.6 

167.7 

164.7 

161.8 

158.9 

155.9 

225 

183.3 

180.4 

177-4 

174-5 

I7I.5 

168.5 

165-6 

162.6 

159.7 

156.7 

226 

184.3 

181.3 

178.3 

175-3 

172.4 

169.4 

166.4 

163.4 

160.5 

157-5 

227 

185-2 

182.2 

179.2 

176.2 

173.2 

170.2 

167.3 

164.3 

161.3 

158.3 

228 

I86.I 

183.1 

iSo.I 

I77.I 

I74.I 

171.1 

I68.I 

165.1 

162.1 

159.1 

229 

187.0 

184.0 

iSl.O 

178.0 

175.0 

172.0 

168.9 

165.9 

162.9 

159-9 

230 

188.0 

184.9 

181.9 

178.9 

175.8 

172.8 

169.8 

166.7 

163.7 

160.7 

231 

188.9 

185.8 

182.8 

179-8 

176.7 

173.7 

170.6 

167.6 

164.5 

161.5 

232 

189.8 

186.8 

183.7 

180.6 

177.6 

174.5 

I7L5 

168.4 

165-3 

162.3 

233 

190.8 

187.7 

184.6 

181.5 

178.5 

175-4 

172.3 

169.2 

I66.I 

163.1 

234 

191.7 

188.6 

185.5 

182.4 

J79-3 

176.2 

I73-I 

170.0 

167.0 

163.9 

235 

192.6 

189.5 

186.4 

183-3 

180.2 

177.1 

174.0 

170.9 

167.8 

164-7 

236 

190.4 

187.3 

184.2 

181.1 

178.0 

174.8 

171.7 

168.6 

165.5 

237 

191.4 

188.2 

185.1 

182.0 

178.8 

175-7 

172.5 

169.4 

166.3 

238 

192.3 

189.1 

186.0 

182.8 

179.7 

176.5 

173.4 

170.2 

167.1 

239 

193.2 

190.0 

186.9 

183.7 

180.5 

177.4 

174.2 

171.0 

167.9 

240 

194.1 

191.0 

187.8 

184.6 

181.4 

178.2 

175.0 

I7I.9 

168.7 

241 

I95-I 

191.9 

188.7 

185.5 

182.3 

I79.I 

175.9 

172.7 

169-5 

242 

196.0 

192.8 

189.6 

186.4 

183.1 

1/9.9 

176.7 

173-5 

170.3 

243 

196.9 

J93.7 

1  9°-  5 

187.2 

184.0 

180.8 

177.5 

174-3 

171.1 

244 

197.8 

194.6 

191.4 

188.1 

184.9 

181.6 

178.4 

I75-I 

171.9 

245 

198.8 

195.5 

192.3 

189.0 

185.7 

182.5 

179.2 

176.0 

172.7 

246 

199.7 

196.4 

193-2. 

189.9 

186.6 

183-3 

180.1 

176.8 

173-5 

247 

200.6 

197.4 

194.1 

190.8 

187.5 

184.2 

180.9 

177.6 

174-3 

248 

201.6 

198.3 

195.0 

191.7 

188.4 

185.1 

181.7 

178.4 

I75-I 

249 

202.5 

199.2 

I95-9 

192.6 

189.2 

185-9 

182.6 

179.3 

176.0 

250 

200.1 

196.8 

193-4 

190.1 

186.8 

183.4 

iSo.I 

176.8 

251 

201.0 

197.7 

194-3 

191.0 

187.6 

184.3 

180.9 

177.6 

252 

202.0 

198.6 

195-2 

191.9 

188.5 

185.1 

iSi.S 

178.4 

253 

202.9 

!99-5 

196.1 

192.7 

189.4 

186.0 

182.6 

179.2 

254 

203.8 

200.4 

197.0 

193.6 

190.2 

1  86.  8 

183.4 

180.0 

255 

204.7 

201.3 

197.9 

194.5 

191.1 

187.7 

184.3 

iSo.8 

256 

205.7 

202.2 

198.8 

195-4 

191.9 

188.5 

185.1 

181.7 

257 

206.6 

203.1 

199.7 

196.3 

192.8 

189.4 

185.9 

182.5 

258 

207.5 

204.1 

200.  6 

197.1 

193.7 

190.2 

186.8 

183-3 

259 

208.4 

205.0 

201.5 

198.0 

194.6 

191.1 

187.6 

184.1 

260 

209.4 

205.9 

202.4 

198.9 

195.4 

191.9 

188.4 

185.0 

SMITHSONIAN  TABLES. 


96 


REDUCTION    OF   THE    BAROMETER    TO    SEA 

METRIC    MEASURES. 
Bo-B=B  (10OT-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


TABLE 
LEVEL. 


19. 


2000  m. 

HEIGHT  OF  THE  BAROMETER  IN  MIIJJMETRES. 

590 

580 

570 

560 

550 

540 

530 

520 

510 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

260 

205.9 

2O2.4 

198.9 

195.4 

191.9 

188.4 

185.0 

181.5 

178.0 

261 

206.8 

203.3 

199.8 

196.3 

192.8 

189.3 

185.8 

182.3 

178.8 

262 

207.7 

204.2 

200.7 

197.2 

193.6 

190.1 

1  86.  6 

183.1 

179.6 

263 

208.6 

205.1 

201.6 

198.0 

194.5 

191.0 

187.4 

183-9 

180.4 

264 

209.6 

206.0 

202.5 

198.9 

195.4 

191.8 

188.3 

184.7 

iSl.I 

265 

210.5 

206.9 

203.3 

199.8 

196.2 

192.6 

189.1 

185.5 

181.9 

266 

211.4 

207.8 

204.2 

200.7 

197.1 

193-5 

189.9 

186.3 

182.7 

267 

212.3 

208.7 

205.1 

201.5 

197.9 

194-3 

190.7 

187.1 

183.5 

268 

213-3 

209.6 

206.0 

202.4 

198.8 

195.2 

191.6 

188.0 

184.3 

269 

214.2 

210.5 

206.9 

203.3 

199.7 

196.0 

192.4 

188.8 

185.1 

270 

2I5-I 

211.5 

207.8 

204.2 

200.5 

196.9 

193.2 

189.6 

185.9 

271 

216.0 

212.4 

208.7 

205.0 

201.4 

197.7 

194.1 

190.4 

186.7 

272 

217.0 

213.3 

209.6 

205.9 

202.3 

198.6 

194.9 

191.2 

187.5 

273 

217.9 

214.2 

210.5 

206.8 

203.1 

199.4 

195.7 

192.0 

188.3 

274 

218.8 

215.1 

211.4 

207.7 

204.0 

200.3 

196.6 

192.9 

189.1 

275 

219.8 

216.0 

212.3 

208.6 

204.9 

2OI.I 

197-4 

193-7 

190.0 

276 

220.7 

216.9 

213.2 

209.5 

205.7 

2O2.O 

198.2 

I94.5 

190.8 

277 

221.6 

217.9 

214.1 

210.3 

206.6 

202.8 

199.1 

J95-3 

191.6 

278 

222.6 

218.8 

215.0 

211.  2 

207.5 

203.7 

199.9 

196.1 

192.4 

279 

223.5 

219.7 

215.9 

212.  1 

208.3 

204.5 

200.8 

197.0 

193.2 

280 

2  20.  6 

216.8 

213.0 

209.2 

205.4 

201.6 

197.8 

194-0 

281 

221.5 

217.7 

213.9 

2IO.  I 

206.3 

202.4 

198.6 

194.8 

282 

222.5 

218.6 

214.8 

211.  0 

2O7.I 

203.3 

J99-5 

195.6 

283 

223.4 

219.5 

215.7 

211.  8 

208.0 

204.1 

200.3 

196.4 

284 

224.3 

220.5 

216.6 

212.7 

208.8 

205.0 

2OI.I 

197.2 

285 

225.2 

221.4 

217.5 

213.6 

209.7 

205.8 

201.9 

198.1 

286 

226.2 

222.3 

218.4 

214.5 

210.6 

206.7 

202.8 

198.9 

287 

227.1 

223.2 

219.3 

215.4 

211.4 

207.5 

203.6 

199.7 

288 

228.0 

224.1 

220.2 

2l6.2 

212.3 

208.4 

204.4 

200.5 

289 

229.0 

225.0 

221.  1 

2I7.I 

213.2 

209.2 

205-3 

201.3 

290 

229.9 

225.9 

222.  0 

218.0 

214.0 

210.  1 

206.  1 

202.1 

291 

230.8 

226.8 

222.9 

218.9 

214.9 

210.9 

206.9 

203.0 

292 

231.8 

227.8 

223.8 

219.8 

215.8 

211.  8 

207.8 

203.8 

293 

232.7 

228.7 

224.7 

220.7 

216.6 

212.6 

208.6 

204.6 

294 

233.6 

229.6 

225.6 

221.5 

217.5 

213-5 

209.5 

205.4 

295 

230.5 

226.5 

222.4 

218.4 

214.3 

2IO-3 

206.3 

296 

231.4 

227.4 

223.3 

219.3 

215.2 

211.  1 

2O7.I 

297 

232.4 

228.3 

224.2 

220.1 

216.1 

212.  0 

207.9 

298 

233.3 

229.2 

225.1 

221.0 

216.9 

212.8 

208.7 

299 

234.2 

23O.I 

226.0 

221.9 

217.8 

213.7 

209.6 

300 

235.1 

231.0 

226.9 

222.8 

218.6 

214.5 

210.4 

301 

236.1 

231.9 

227.8 

223.6 

219.5 

215-4 

211.  2 

302 

237.0 

232.8 

228.7 

224.5 

220.4 

216.2 

212.  1 

303 

237.9 

233-8 

229.6 

225.4 

221.2 

2I7.I 

212.9 

304 

238.9 

234-7 

230.5 

226.3 

222.1 

217.9 

213.7 

305 

239.8 

235.6 

231.4 

227.2 

223.0 

218.8 

2T4.6 

SMITHSONIAN  TABLES. 


97 


TABLE   19. 

REDUCTION    OF    THE    BAROMETER    TO    SEA    LEVEL. 

METRIC    MEASURES. 
80-8  =  8(10^-1). 

Top  argument :     Height  of  the  barometer  (B). 

Side  argument :     Values  of  2000  m  obtained  from  Table  17. 


onnn  n\ 

HEIGHT  OF  THE  BAROMETER   IN  MILLIMETRES. 

£\j\j\j  m. 

560 

550 

540 

530 

520 

510 

500 

490 

480 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

305 

235.6 

231.4 

227.2 

223.0 

218.8 

214.6 

210.3 

206.  1 

201.9 

306 

236.5 

232.3 

228.0 

223.8 

219.6 

215.4 

211.  2 

206.9 

202.7 

307 

237-4 

233.2 

228.9 

224.7 

220.5 

2l6.2 

212.  0 

207.7 

203.5 

308 

238.3 

234.1 

229.8 

225.6 

221.3 

2I7.I 

212.8 

208.5 

204.3 

309 

239.2 

235.0 

230.7 

226.4 

222.2 

217.9 

213.6 

209.4 

205.1 

3IO 

240.2 

235.9 

231.6 

227.3 

223.0 

218.7 

214.4 

210.  1 

205.9 

3ii 

241.1 

236.8 

232.5 

228.2 

223.9 

219.6 

215-3 

211.  0 

206.7 

312 

242.0 

237-7 

233.4 

229.1 

224.7 

22O.4 

216.  i 

211.  8 

207.5 

313 

242.9 

238.6 

234-3 

229.9 

225.6 

221.2 

216.9 

212.6 

208.2 

3H 

243.9 

239-5 

235-2 

230.8 

226.4 

222.1 

217.7 

213.4 

209.0 

315 

244.8 

240.4 

236.0 

231.7 

227.3 

222.9 

218.6 

214.2 

209.8 

3i6 

245.7 

24L3 

237.0 

232.6 

228.2 

223.8 

.  219.4 

215.0 

210.6 

317 

246.6 

242.2 

237.8 

233-4 

229.0 

224.6 

2  20.  2 

215.8 

211.4 

3i8 

247.6 

243.2 

238.7 

234-3 

229.9 

225-5 

221.  1 

216.6 

212.2 

319 

248.5 

244.1 

239.6 

235.2 

230.8 

226.3 

221.9 

217.4 

213.0 

320 

2494 

245.0 

240.5 

236.1 

231.6 

227.2 

222.7 

218.3 

213.8 

321 

250.4 

245-9 

241.4 

237.0 

232.5 

228.0 

223.6 

2I9.I 

214.6 

322 

251.3 

246.8 

242.3 

237.8 

233-4 

228.9 

224.4 

219.9 

215-4 

323 

252.2 

247.7 

243-2 

238.7 

234-2 

229.7 

225.2 

220.7 

216.2 

324 

253.2 

248.7 

244.1 

239-6 

235.1 

230.6 

226.0 

221.5 

217.0 

325 

254.1 

249.6 

245.0 

240.5 

236.0 

231.4 

226.9 

222.4 

217.8 

326 

250.5 

245.9 

241.4 

236.8 

232.3 

227.7 

223.2 

218.6 

327 

25L4 

246.8 

242.3 

237-7 

233.1 

228.6 

224.0 

219.4 

328 

252.3 

247.7 

243.2 

238.6 

234.0 

229.4 

224.8 

220.2 

329 

253.3 

248.7 

244.0 

239.4 

234.8 

230.2 

225.6 

221.0 

330 

254-2 

249.6 

244.9 

240.3 

235.7 

23I.I 

226.5 

221.8 

33i 

255.1 

250.5 

245.8 

241.2 

236.6 

231.9 

227.3 

222.6 

332 

256.0 

25L4 

246.7 

242.1 

237.4 

232.8 

228.1 

223.5 

333 

257.0 

252.3 

247.6 

243-0 

238.3 

233-6 

228.9 

224.3 

334 

257-9 

253-2 

248.5 

243-8 

239.2 

234.5 

229.8 

225.1 

335 

258.8 

254.1 

249-4 

244.7 

240.0 

235-3 

230.6 

225-9 

336 

259.8 

255-0 

250.3 

245.6 

240.9 

236.2 

23I-4 

226.7 

337 

260.7 

256.0 

251.2 

246.5 

241.7 

237-0 

232.3 

227.5 

338 

261.6 

256.9 

252.1 

2474 

242.6 

237.8 

233.1 

228.3 

339 

262.6 

257-8 

253-0 

248.2 

243-5 

238.7 

233-9 

229.2 

340 

263.5 

258.7 

253.9 

249.1 

244-4 

239.6 

234.8 

230.0 

34i 

264.4 

259.6 

254-8 

250.0 

245-2 

240.4 

235.6 

230.8 

342 

260.6 

255-7 

250.9 

246.1 

241.3 

236.4 

231.6 

343 

261.5 

256.6 

251.8 

247.0 

242.1 

237.3 

232.4 

344 

262.4 

257.5 

252.7 

247.8 

243.0 

238.1 

233-2 

345 

263.3 

258.4 

253.6 

248.7 

243.8 

238.9 

234.1    ' 

SMITHSONIAN  TABLES. 


98 


TABLE   2O. 

DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

ENGLISH     MEASURES. 
Values  of  60368  [1  +  O.O010195  X  36]  log    29-90. 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08  1  .09 

i 

Inches. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet.    Feet. 

1  2.00 

24814 

24791 

24769 

24746 

24723 

24701 

24678 

24656 

24633   24611 

12.10 

24588 

24566 

24543 

24521 

24499 

24476 

24454 

24431 

24409   24387 

I2.2O 

24365 

24342 

24320 

24298 

24276 

24253 

24231 

24209 

24187   24165 

12.30 

24M3 

24121 

24098 

24076 

24054 

24032 

24010 

23988 

23966   23944 

I2.4O 

23923 

23901 

23879 

23857 

23835 

23813 

23791 

23770 

23748 

23726 

12.50 

23704 

23682 

23661 

23639 

23617 

23596 

23574 

23552 

23531 

23509 

12.60 

23488 

23466 

23445 

23423 

23402 

23380 

23359 

23337 

23316 

23294 

12.70 

23273 

23251 

23230 

23209 

23187 

23166 

23T45 

23123 

23102  |  23081 

12.80 

23060 

23038 

23017 

22996 

22975 

22954 

22933 

22911 

22890 

22869 

12.90 

22848 

22827 

22806 

22785 

22764 

22743 

22722 

22701 

22680 

22659 

13.00 

22638 

22617 

22596 

22576 

22555 

22534 

22513 

22492 

22471 

22451 

13.10 

22430 

22409 

22388 

22368 

22347 

22326 

22306 

22285 

22264 

22244 

13.20 

22223 

22203 

22182 

22l62 

22141 

22I2I 

22IOO 

22080 

22059 

22039 

I3-30 

22018 

21998 

21977 

21957 

21937 

2I9I6 

2i896 

21876 

21855 

21835 

13.40 

21815 

21794 

21774 

21754 

21734 

2I7I3 

21693 

21673 

21653 

21633 

13.50 

21612 

21592 

21572 

21552 

21532 

2I5I2 

21492 

21472 

21452 

21432 

13.60 

21412 

21392 

21372 

21352 

21332 

2I3I2 

21292 

21272 

21252 

21233 

13.70 

21213 

21193 

2H73 

2H53 

2H34 

2III4 

21094 

21074 

21054 

21035 

13.80 

21015 

20995 

20976 

20956 

20936 

20917 

20897 

20878 

20858 

20838 

13.90 

20819 

20799 

20780 

20760 

20741 

20721 

2O7O2 

20682 

20663 

20643 

14.00 

20624 

20605 

20585 

20566 

20546 

20527 

20508 

20488 

20469 

20450 

14.10 

20431 

20411 

20392 

20373 

20354 

20334 

20315 

20296 

20277 

20258 

14.20 

20238 

20219 

20200 

20l8l 

20162 

20143 

20124 

20105 

20086 

20067 

14.30 

20048 

20029 

20010 

19991 

19972 

19953 

19934 

I99I5 

19896 

19877 

14.40 

19858 

19839 

19821 

19802 

19783 

19764 

19745 

19727 

19708 

19689 

14.50 

19670 

19651 

19633 

19614 

J9595 

19577 

19558 

19539 

I952I 

19502 

14.60 

19483 

19465 

19446 

19428 

19409 

I9390 

19372 

19353 

19335 

19316 

14.70 

19298 

19279 

I926l 

19242 

19224 

19206 

I9I87 

19169 

19150 

I9I32 

14.80 

19114 

19077 

19059 

19040 

I9O22 

19004 

18985 

18967 

18949 

14.90 

18931 

18912 

18894 

18876 

18858 

18840 

I882I 

18803 

18785 

18767 

15.00 

18749 

18731 

I87I3 

18694 

18676 

18658 

18640 

18622 

18604 

18586 

15.10 

18568 

18550 

18532 

18514 

18496 

18478 

18460 

18442 

18425 

18407  . 

15.20 

18389 

18371 

18353 

18335 

18317 

18300 

18282 

18264 

18246 

18228  ' 

15-30 

18211 

18193 

I8I75 

I8I57 

18140 

I8I22 

l8l04 

18086 

18069 

18051 

15.40 

18033 

18016 

17998 

17981 

17963 

17945 

17928 

I79IO 

17893 

17875 

15.50 

17858 

17840 

17823 

17805 

17788 

17770 

17753 

17735 

17718 

17700 

15.60 

17683 

17665 

17648 

17631 

17613 

17596 

17578 

17561 

17544 

17526 

15-70 

17509 

17492 

17474 

17457 

17440 

17423 

17405 

17388 

I737I 

17354 

15.80 

17337 

I73I9 

17302 

17285 

17268 

I725I 

17234 

17216 

17199 

17182 

15.90 

17165 

17148 

I7I3I 

I7II4 

17097 

17080 

17063 

17046 

17029 

17012  ! 

16.00 

16995 

16978 

16961 

16944 

16927 

16910 

16893 

16876 

16859 

16842 

16.10 

16825 

16808 

16792 

16775 

16758 

16741 

16724 

16707 

16691 

16674 

16.20 

16657 

16640 

16623 

16607 

16590 

16573 

16557 

16540 

16523 

16506 

16.30 

16490 

16473 

16456 

16440 

16423 

16406 

16390 

16373 

16357 

16340  ; 

16.40 

16324 

16307 

16290 

16274 

16257 

16241 

16224 

16208 

16191 

16175  | 

16.50 

16158 

16142 

I6I25 

16109 

16092 

16076 

16060 

16043 

16027 

16010 

16.60 

15994 

15978 

I596I 

15945 

15929 

I59I2 

15896 

15880 

15863 

15847 

16.70 

15831 

I58I5 

15798 

15782 

15766 

15750 

15733 

I57I7 

I570I 

15685 

16.80 

15669 

15652 

15636 

15620 

15604 

15588 

15572 

15556 

15539 

15523 

16.90 

15507 

I549I 

15475 

15459 

15443 

15427 

I54H 

15395 

15379 

15363 

17.00 

15347 

I533I 

I53I5 

15299 

15283 

15267 

I525I 

J5235 

15219 

15203 

SMITHSONIAN  TABLES. 


TOO 


TABLE   20. 


DETERMINATION    OF    HEIGHTS    BY    THE 

ENGLISH    MEASURES. 


Values  of  60368  [1  +  O.O010195  X  36]   log  - 


.  vc  ,  . 

Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 
17.00 

Feet. 
15347 

Feet. 
I533I 

Feet. 
I53I5 

Feet. 
15299 

Feet. 
15283 

Feet. 

15267 

Feet. 
I525I 

Feet. 
15235 

Feet. 
15219 

Feet. 
15203 

17.10 

I5I87 

15172 

I5I56 

15140 

15124 

15108 

15092 

15076 

15061 

15045  i 

17.20 

15029 

I50I3 

14997 

14982 

14966 

14950 

14934 

14919 

14903 

14887 

17.30 

14871 

14856 

14840 

14824 

14809 

14793 

14777 

14762 

14746 

14730 

1740 

I47I5 

14699 

14684 

14668 

14652 

14637 

14621 

14606 

1459° 

14575 

17.50 

H559 

14544 

14528 

14512 

14497 

14481 

14466 

M45I 

14435 

14420 

17.60 

14404 

14389 

14373 

14358 

14342 

14327 

14312 

14296 

14281 

14266 

17.70 

14250 

14235 

14219 

14204 

14189 

I4I73 

14158 

I4I43 

14128 

I4II2 

17.80 

14097 

14082 

14067 

14051 

14036 

14021 

14006 

13990 

13975 

13960 

17.90 

J3945 

13930 

I39H 

13899 

13884 

13869 

13854 

13839 

13824 

13808 

18.00 

I3793 

13778 

13763 

13748 

13733 

13718 

13703 

13688 

13673 

13658 

18.10 

I3643 

13628 

13613 

13598 

13583 

13568 

13553 

13538 

13523 

13508 

18.20 

13493 

13478 

13463 

13448 

13433 

13418 

13404 

13389 

13374 

13359 

18.30 

13314 

13329 

I33H 

13300 

13285 

13270 

13255 

13240 

13226 

13211 

18.40 

13196 

13181 

13166 

I3I52 

I3I37 

13122 

13107 

13093 

13078 

13063 

18.50 

13049 

13034 

13019 

13005 

12990 

12975 

12961 

12946 

12931 

12917 

18.60 

12902 

12888 

12873 

12858 

12844 

12829 

12815 

12800 

12785 

I277I 

18.70 

12756 

12742 

12727 

12713 

12698 

12684 

12669 

12655 

12640 

12626 

18.80 

72611 

12597 

12583 

12568 

12554 

12539 

12525 

12510 

12496 

12482 

18.90 

12467 

12453 

12438 

12424 

12410 

12395 

12381 

12367 

12352 

12338  i 

19.00 

12324 

12310 

12295 

I228I 

12267 

12252 

12238 

12224 

12210 

12195 

19.10 

12181 

12167 

I2I53 

12138 

12124 

I2IIO 

12096 

12082 

12068 

12053 

19.20 

12039 

12025 

1  201  1 

11997 

11983 

11969 

H954 

11940 

II926 

II9I2 

19.30 

11898 

11884 

II870 

11856 

11842 

II828 

11814 

IlSoo 

II786 

II772 

19.40 

H758 

II744 

II730 

11716 

11702 

II688 

11674 

11660 

11646 

11632 

19.50 

11618 

11604 

II590 

11576 

11562 

II548 

H534 

11520 

II507 

1  1493 

19.60 

11479 

11465 

H45I 

H437 

11423 

II4IO 

11396 

11382 

II368 

H354 

19.70 

11340 

11327 

H3I3 

11299 

11285 

II272 

11258 

11244 

II230 

II2T7 

19.80 

11203 

11189 

IH75 

11162 

11148 

III34 

III2I 

11107 

II093 

11080 

19.90 

11066 

11052 

11039 

II025 

IIOII 

10998 

10984 

10970 

10957 

10943 

20.00 

10930 

10916 

10903 

10889 

10875 

10862 

10848 

10835' 

I082I 

10808 

20.  i  o 

10794 

10781 

10767 

10754 

10740 

10727 

I07I3 

10700 

10686 

10673 

20.20 

10659 

10646 

10632 

10619 

10605 

10592 

10579 

10565 

10552 

10538 

20.30 

10525 

10512 

10498 

10485 

10472 

10458 

10445 

10431 

IO4l8 

10405 

20.40 

10391 

10378 

10365 

10352 

10338 

10325 

I03I2 

10298 

10285 

10272 

20.50 

10259 

10245 

10232 

10219 

10206 

IOI92 

IOI79 

I0l66 

IOI53 

10139 

20.60 

10126 

IOII3 

IOIOO 

10087 

10074 

10060 

10047 

10034 

1002  1 

10008 

20.70 

9995 

9982 

9968 

9955 

9942 

9929 

9916 

9903 

9890 

9877 

20.80 

9864 

9851 

9838 

9825 

9812 

9799 

9786 

9772 

9759 

9746 

20.90 

9733 

9720 

9707 

9694 

9681 

9668 

9655 

9642 

9629 

9617 

21.00 

9604 

9591 

9578 

9565 

9552 

9539 

9526 

9513 

9500 

9487 

21.10 

9474 

9462 

9449 

9436 

9423 

9410 

9397 

9384 

9372 

9359 

21.20 

9346 

9333 

9320 

9307 

9295 

9282 

9269 

9256 

9244 

9231 

21.30 

9218 

9205 

9J93 

9180 

9167 

9*54 

9142 

9129 

9116 

9103 

2T.4O 

9091 

9078 

9065 

9053 

9040 

9027 

9OI5 

9002 

8989 

8977 

21.50 

8964 

8951 

8939 

8926 

8913 

8901 

8888 

8876 

8863 

8850; 

21.60 

8838 

8825 

8813 

8800 

8788 

8775 

8762 

8750 

8737 

8/25 

21.70 

8712 

8700 

8687 

8675 

8662 

8650 

8637 

8625 

8612 

8600 

21.80 

8587 

8575 

8562 

8550 

8538 

8525 

8513 

8500 

8488 

8475 

21.90 

8463 

8451 

8438 

8426 

8413 

8401 

8389 

8376 

8364 

8352 

22.00 

8339 

8327 

8314 

8302 

8290 

8277 

8265 

8253 

8240 

8228 

SMITHSONIAN  TABLES. 


IOI 


TABLE  20. 

DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER, 

ENGLISH    MEASURES. 

OQ    Q f\ 

Values  of  6O368  [1+0.0010195X36]   log  =*. 


Barometric 
Pressure. 
B. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 

22.00 

Feet. 
8339 

Feet. 

8327 

Feet. 

Feet. 

8302 

Feet. 
8290 

Feet. 
8277 

Feet. 
8265 

Feet. 
8253 

Feet. 
8240 

Feet. 
8228 

22.  IO 

8216 

8204 

8191 

8179 

8167 

8154 

8142 

8130 

8118 

8l05 

22.2O 

8093 

8081 

8069 

8056 

8044 

8032 

8020 

8008 

7995 

7983 

22.30 

7971 

7959 

7947 

7935 

7922 

7910 

7898 

7886 

7874 

7862 

22.40 

7849 

7837 

7825 

7813 

7801 

7789 

7777 

7765 

7753 

7740 

22.50 

7728 

7716 

7704 

7692 

7680 

7668 

7656 

7644 

7632 

7620 

22.60 

7608 

7596 

7584 

7572 

7560 

7548 

7536 

7524 

7512 

7500 

22.70 

7488 

7476 

7464 

7452 

7440 

7428 

7416 

7404 

7392 

7380 

22.80 

7368 

7356 

7345 

7333 

7321 

7309 

7297 

7285 

7273 

7261 

22.90 

7249 

7238 

7226 

7214 

7202 

7190 

7178 

7166 

7155 

7M3 

23.00 

7131 

7119 

7107 

7096 

7084 

7072 

7060 

7048 

7037 

7025 

23.10 
23.20 

7013 
6896 

7001 
6884 

6990 
6872 

6978 
6861 

6966 
6849 

6954 
6837 

6943 
6825 

6931 
6814 

6919 
6802 

6907 
6790 

23-30 

6779 

6767 

6755 

6744 

6732 

6721 

6709 

6697 

6686 

6674 

23.40 

6662 

6651 

6639 

6628 

6616 

6604 

6593 

6581 

6570 

6558 

23.50 

6546 

6535 

6523 

6512 

6500 

6489 

6477 

6466 

6454 

6443 

23.60 

6431 

6420 

6408 

6397 

6385 

6374 

6362 

6351 

6339 

6328 

23.70 

6316 

6305 

6293 

6282 

6270 

6259 

6247 

6236 

6225 

6213 

23.80 

6202 

6190 

6179 

6167 

6156 

6145 

6l22 

6110 

6099 

23.90 

6088 

6076 

,6065 

6054 

6042 

6031 

6020 

6008 

5997 

5986 

24.00 

5974 

5963 

5952 

5940 

5929 

5918 

5906 

5895 

5884 

5872 

24.10 

5861 

5850 

5839 

5827 

5805 

5794 

5782 

577i 

5760 

24.20 

5749 

5737 

5726 

5715 

5704 

5693 

5681 

5670 

5659 

5648 

24.30 

5637 

5625 

5614 

5603 

5592 

5581 

5570 

5558 

5547 

5536 

24.40 

5525 

55M 

5503 

5492 

5480 

5469 

5458 

5447 

5436 

5425 

24.50 

54H 

5403 

5392 

538i 

5369 

5358 

5347 

5336 

5325 

5314 

24.60 

5303 

5292 

5281 

5270 

5259 

5248 

5237 

5226 

5215 

5204 

24.70 

5193 

5182 

5171 

5160 

5149 

5138 

5127 

5116 

5105 

5094 

24.80 

5083 

5072 

5061 

5050 

5039 

5028 

5017 

5006 

4995 

4985 

24.90 

4974 

4963 

4952 

4941 

4930 

4919 

4908 

4897 

4886 

4876 

25.00 

4865 

4854 

4843 

4832 

4821 

4810 

4800 

4789 

4778 

4767 

25.10 

4756 

4745 

4735 

4724 

4713 

4702 

4691 

4681 

4670 

4659 

25.20 

4648 

4637 

4627 

4616 

4605 

4594 

4584 

4573 

4562 

4551 

25-30 

4540 

4530 

4519 

4508 

4498 

4487 

4476 

4465 

4455 

4444 

25.40 

4433 

4423 

4412 

4401 

4391 

4380 

4369 

4358 

4348 

4337 

25.50 

4326 

43i6 

4305 

4295 

4284 

4273 

4263 

4252 

4241 

4231 

25.60 

4220 

4209 

4199 

4188 

4178 

4167 

4156 

4146 

4135 

4125 

25.70 

4114 

4104 

4093 

4082 

4072 

4061 

4051 

4040 

4030 

4019 

25.80 

4009 

3998 

3988 

3977 

3966 

3956 

3945 

3935 

3924 

3914 

25.90 

3903 

3893 

3882 

3872 

3861 

3851 

3841 

3830 

3820 

3809 

26.00 

3799 

3788 

3778 

3767 

3757 

3746 

3736 

3726 

3715 

3705 

26.10 

3694 

3684 

3674 

3663 

3653 

3642 

3632 

3622 

3611 

3601 

26.20 

3590 

358o 

3570 

3559 

3549 

3539 

3528 

3518 

3508 

3497 

26.30 

3487 

3477 

3466 

3456 

3446 

3435 

3425 

3415 

3404 

3394 

26.40 

3384 

3373 

3363 

3353 

3343 

3332 

3322 

3312 

3301 

3291 

26.50 

3281 

3270 

3260 

3250 

3240 

3230 

3219 

3209 

3199 

3189 

SMITHSONIAN  TABLES. 


102 


TABLE   20. 
DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

ENGLISH    MEASURES. 

Values  of  6O368  [1  +  O.OO1O195  X  36]  log  ^        • 


Barometric 
Pressure. 
B. 

.00 

.01 

02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

Inches. 
26.50 

Feet. 
3281 

Feet. 
3270 

Feet. 
3260 

Feet. 
3250 

Feet. 

3240 

Feet. 
3230 

Feet. 
3219 

Feet. 
3209 

Feet. 
3199 

Feet. 
3189 

26.60 

3179 

3168 

3158 

3H8 

3138 

3128 

3H7 

3107 

3097 

3087 

26.70 

3077 

3066 

3056 

3046 

3036 

3026 

3016 

3005 

2995 

2985 

26.80 

2975 

2965 

2955 

2945 

2934 

2924 

2914 

2904 

2894 

2884 

26.90 

2874 

2864 

2854 

2843 

2833 

2823 

2813 

2803 

2793 

2783 

27.00 

2773 

2763 

2753 

2743 

2733 

2723 

2713 

2703 

2692 

2682 

27.10 

2672 

2662 

2652 

2642 

2632 

2622 

2612 

2602 

2592 

2582 

27.20 

2572 

2562 

2552 

2542 

2532 

2522 

2512 

2502 

2493 

2483 

27.30 

2473 

2463 

2453 

2443 

2433 

2423 

2413 

2403 

2393 

2383 

27.40 

2373 

2363 

2353 

2343 

2334 

2324 

23M 

2304 

2294 

2284 

27.50 

2274 

2264 

2254 

2245 

2235 

2225 

2215 

2205 

2195 

2185 

27.60 

2176 

2166 

2156 

2*146 

2136 

2126 

2116 

2107 

2097 

2087 

27.70 

2077 

2067 

2058 

2048 

2038 

2028 

2018 

2009 

1999 

1989 

27.80 

1979 

1970 

1960 

1950 

1940 

1930 

1921 

1911 

1901 

1891 

27.90 

1882 

1872 

1862 

1852 

1843 

1833 

1823 

1814 

1804 

1794 

28.00 

1784 

1775 

1765 

1755 

1746 

1736 

1726 

1717 

1707 

1697 

28.10 

1688 

1678 

1668 

1659 

1649 

1639 

1630 

1620 

1610 

1601 

28.20 

1591 

1581 

1572 

1562 

1552 

1543 

1533 

1524 

I5H 

1504 

28.30 

M95 

1485 

1476 

1466 

1456 

1447 

1437 

1428 

1418 

1408 

28.40 

1399 

1389 

I38o 

1370 

1361 

1351 

1342 

1332 

1322 

1313 

28.50 

1303 

1294 

1284 

1275 

1265 

1256 

1246 

1237 

1227 

1218 

28.60 

1208 

1199 

1189 

1180 

II7O 

1161 

1151 

1142 

1132 

1123 

28.70 

1113 

1104 

1094 

1085 

1075 

1066 

1057 

1047 

1038 

1028 

28.80 

1019 

1009 

TOGO 

99° 

981 

972 

962 

953 

943 

934 

28.90 

925 

915 

906 

896 

887 

878 

868 

859 

849 

840 

29.00 

331 

821 

812 

803 

793 

784 

775 

765 

756 

746 

29.10 

737 

728 

718 

709 

700 

690 

681 

672 

663 

653 

29.20 

644 

635 

625 

616 

607 

597 

588 

579 

570 

56o 

29.30 

55i 

542 

532 

523 

5H 

505 

495 

486 

477 

468 

29.40 

458 

449 

440 

43i 

421 

412 

403 

394 

384 

375 

29.50 

366 

357 

348 

338 

329 

320 

3ii 

302 

292 

283 

29.60 

274 

265 

256 

247 

237 

228 

219 

210 

201 

192 

29.70 

182 

173 

164 

155 

146 

137 

128 

118 

109 

TOO 

29.80 

+  9i 

+  82 

4-  73 

+  64 

+  55 

+  45 

+  36 

+  27 

+  '3 

+  9 

29.90 

0 

-  9 

-  18 

-  27 

-  36 

-  45 

-  55 

-  64 

-  73 

-  82 

30.00 

-  91 

—  100 

—  109 

-118 

-  127 

-r36 

-145 

-154 

-163 

-172 

30.10 

-181 

-190 

-199 

-208 

-217 

-226 

-235 

-244 

-253 

-262 

30.20 

-271 

-280 

-289 

—  298 

-307 

-316 

-325 

-334 

-343 

-352 

30.30 

-361 

-370 

-379 

-388 

-397 

—  406 

-415 

-424 

-433 

-442 

30.40 

-451 

—  460 

-469 

-478 

-486 

-495 

-504 

-513 

-522 

-53' 

30.50 

-540 

-549 

-558 

-567 

-576 

-585 

-593 

-602 

-611 

—  620 

30.60 

—  629 

-638 

-647 

-656 

-665 

-673 

-682 

—  691 

-700 

-709 

30.70 

-718 

-727 

-735 

—  744 

-753 

-762 

-771 

-780 

-788 

-797 

30.80 

-806 

-815 

-824 

-833 

-841 

-850 

-859 

-868 

-877 

-885 

SMITHSONIAN  TABLES. 


I03 


TABLE 


21. 

DETERMINATION 


OF    HEIGHTS    BY    THE    BAROMETER. 

ENGLISH     MEASURES. 
Term  for  Temperature:    0.002039  (Q  —  50°)  z. 


For  temperatures 


£}the  va,ues  are  ,o 


subtracted. 


Mean 
Temperature. 
0. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLE  20. 

20 

40 

60 

80 

100 

200 

300 

400 

500 

600 

700 

800 

900 

F. 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

49° 

51° 

0 

O 

O 

O 

O 

O 

I 

I 

I 

I 

I 

2 

2 

48 

52 

o 

O 

O 

O 

O 

I 

I 

2 

2 

2 

3 

3 

4 

47 

53 

O 

o 

O 

O 

I 

I 

2 

2 

3 

4 

4 

5 

6 

46 

54 

O 

o 

O 

I 

I 

2 

2 

3 

4 

5 

6 

7 

7 

45 

55 

0 

o 

I 

I 

I 

2 

3 

4 

5 

6 

7 

8 

9 

44 

56 

O 

o 

I 

I 

I 

2 

4 

5 

6 

7 

9 

10 

ii 

43 

57 

O 

I 

I 

I 

3 

4 

6 

7 

9 

10 

ii 

13 

42 

58 

O 

I 

I 

2 

3 

5 

7 

8 

10 

ii 

13 

15 

4i 

59 

O 

I 

I 

2 

4 

6 

7 

9 

ii 

13 

15 

17 

40 

60 

o 

I 

2 

2 

4 

6 

8 

10 

12 

14 

16 

18 

39 

61 

o 

I 

2 

2 

4 

7 

9 

ii 

13 

16 

18 

20 

38 

62 

o 

I 

2 

2 

5 

7 

10 

12 

15 

17 

20 

22 

37 

63 

I 

2 

2 

3 

5 

8 

ii 

13 

16 

19 

21 

24 

36 

64 

I 

2 

2 

3 

6 

9 

ii 

14 

17 

20 

23 

26 

35 

65 

I 

2 

2 

3 

6 

9 

12 

15 

18 

21 

24 

28 

34 

66 

I 

2 

3 

3 

7 

10 

13 

16 

20 

23 

26 

29 

33 

67 

I 

2 

3 

3 

7 

10 

14 

17 

21 

24 

28 

31 

32 

68 

I 

2 

3 

4 

7 

ii 

15 

18 

22 

26 

29 

33 

3i 

69 

I 

2 

2 

3 

4 

8 

12 

15 

19 

23 

27 

31 

35  ; 

30 

70 

I 

2 

2 

3 

4 

8 

12 

16 

20 

24 

29 

33 

37 

29 

7i 

I 

2 

3 

3 

4 

9 

13 

17 

21 

26 

3° 

34 

39 

28 

72 

I 

2 

3 

4 

4 

9 

13 

18 

22 

27 

31 

36 

40 

27 

73 

I 

2 

3 

4 

5 

9 

14 

J9 

23 

28 

33 

38 

42 

26 

74 

I 

2 

3 

4 

5 

10 

15 

20 

24 

29 

34 

39 

44 

25 

75 

I 

2 

3 

4 

5 

10 

15 

20 

25 

31 

36 

4i 

46 

24 

76 

I 

2 

3 

4 

5 

ii 

16 

21 

27 

32 

37 

42 

48 

23 

77 

I 

2 

3 

4 

6 

ii 

17 

22 

28 

33 

39 

44 

50 

22 

78 

I 

2 

3 

5 

6 

ii 

17 

23 

29 

34 

40 

46 

5i 

21 

79 

I 

2 

4 

5 

6 

12 

18 

24 

30 

35 

4i 

47 

53 

20 

80 

I 

2 

4 

5 

6 

12 

18 

24 

31 

37 

43 

49 

55 

19 

Si 

I 

3 

4 

5 

6 

13 

19 

25 

32 

38 

44 

5i 

57 

18 

82 

I 

3 

4 

5 

7 

13 

20 

26 

33 

39 

46 

52 

59 

17 

83 

I 

3 

4- 

5 

7 

13 

20 

27 

34 

40 

47 

54 

61 

16 

84 

I 

3 

4 

6 

7 

14 

21 

28 

35 

42 

49 

55 

62 

15 

85 

I 

3 

4 

6 

7 

14 

21 

29 

36 

43 

50 

57 

64 

14 

86 

I 

3 

4 

6 

7 

15 

22 

29 

37 

44 

5^ 

59 

66 

13 

87 

2 

3 

5 

6 

8 

15 

23 

30 

38 

45 

53 

60 

68 

12 

88 

2 

3 

5 

6 

8 

15 

23 

31 

39 

46 

54 

62 

70 

II 

89 

2 

3 

5 

6 

8 

16 

24 

32 

40 

48 

56 

64 

72 

10 

90 

2 

3 

5 

7 

8 

r6 

24 

33 

4i 

49 

57 

65 

73 

91 

2 

3 

5 

7 

8 

17 

25 

33 

42 

50 

59 

67 

75 

8 

92 

2 

3 

5 

7 

9 

17' 

26 

34 

43 

5i 

60 

69 

77 

7 

93 

2 

4 

5 

7 

9 

18 

26 

35 

44 

53 

61 

70 

79 

6 

94 

2 

4 

'5 

7 

9 

18 

27 

36 

45 

54 

63 

72 

81 

5 

95 

2 

4 

6 

7 

9 

18 

28 

37 

46 

55 

64 

73 

83 

4 

96 

2 

4 

6 

8 

9 

19 

28 

38 

47 

56 

66 

75 

84 

3 

97 

2 

4 

6 

8 

10 

19 

29 

38 

48 

57 

67 

77 

86 

2 

98 

2 

4 

6 

8 

10 

20 

29 

39 

49 

59 

69 

78 

88 

i 

99 

2 

4 

6 

8 

IO 

20 

30 

40 

50 

60 

70 

80 

90 

0 

100 

2 

4 

6 

8 

10 

20 

31 

4i 

5i 

61 

7i 

82 

92 

SMITHSONIAN  TABLES. 


104 


TABLE   21 
DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

ENGLISH    MEASURES. 
Term  for  Temperature  :    0.002039  (0  — 5°°)  z. 


For  temperatures 


values  are  to  be 


Mean 
Temperature. 

0. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLE  2O. 

1000 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

10000 

20000 

F. 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

49° 

51° 

2 

4 

6 

8 

10 

12 

14 

16 

18 

2O 

41 

48 

52 

4 

8 

12 

16 

20 

24 

29 

33 

37 

41 

82 

47 

53 

6 

12 

18 

24 

31 

37 

43 

49 

55 

61 

122 

46 

54 

8 

16 

24 

33 

41 

49 

'57 

65 

73 

82 

163 

45 

55 

10 

20 

31 

41 

51 

61 

71 

82 

92 

102 

2O4 

44 

56 

12 

24 

37 

49 

6l 

73 

86 

98 

I  10 

T22 

245 

43 

57 

H 

29 

43 

57 

71 

86 

.100 

114 

128 

'43 

285 

42 

58 

16 

33 

49 

65 

82 

98 

114 

130 

M7 

163 

326 

4i 

59 

18 

37 

55 

73 

92 

no 

128 

H7 

165 

184 

367 

40 

60 

20 

4i 

61 

82 

102 

122 

143 

163 

184 

204 

408 

39 

61 

22 

45 

67 

90 

112 

135 

157 

179 

202 

224 

449 

3« 

62 

24 

49 

73 

98 

122 

147 

171 

196 

220 

245 

489 

37 

63 

27 

53 

80 

106 

133 

J59 

186 

212 

239 

265 

530 

36 

64 

29 

57 

86 

114 

143 

171 

200 

228 

257 

285 

57i 

35 

65 

31 

6! 

92 

122 

153 

184 

214 

245 

275 

306 

612 

34 

66 

33 

65 

98 

I30 

I63 

196 

228 

26l 

294 

326 

652 

33 

67 

35 

69 

104 

139 

173 

208 

243 

277 

312 

347 

693 

32 

68 

37 

73 

no 

147 

184 

220 

257 

294 

330 

367 

734 

3i 

69 

39 

77 

116 

155 

194 

232 

271 

310 

349 

387 

775 

30 

70 

4i 

82 

122 

163 

2O4 

245 

285 

326 

367 

408 

816 

29 

7i 

43 

86 

128 

171 

214 

257 

300 

343 

385 

428 

856 

28 

72 

45 

90 

135 

179 

224 

269 

314 

359 

404 

449 

897 

27 

73 

47 

94 

141 

188 

234 

281 

328 

375 

422 

469 

938 

26 

74 

49 

98 

147 

196 

245 

294 

343 

39i 

440 

489 

979 

25 

75 

5i 

IO2 

153 

204 

255 

306 

357 

408 

459 

5io 

1020 

24 

76 

53 

106 

J59 

212 

265 

3i8 

37i 

424 

477 

530 

1060 

23 

77 

55 

no 

165 

220 

275 

330 

385 

440 

495 

55i 

IIOI 

22 

78 

57 

114 

171 

228 

285 

343 

400 

457 

514 

57i 

1142 

21 

79 

59 

118 

177 

236 

296 

355 

414 

473 

532 

59i 

Il83 

20 

80 

61 

122 

184 

245 

306 

367 

428 

489 

55i 

612 

I223 

J9 

Si 

63 

126 

190 

253 

316 

379 

442 

506 

569 

632 

1264 

18 

82 

65 

130 

196 

26l 

326 

39  1 

457 

522 

587 

652 

I3°5 

17 

33 

67 

135 

202 

269 

336 

404 

471 

538 

606 

673 

1346 

16 

84 

69 

139 

208 

277 

347 

416 

485 

555 

624 

693 

1387 

15 

85 

7i 

143 

214 

285 

357 

428 

500 

57i 

642 

7H 

1427 

14 

86 

73 

147 

220 

294 

367 

440 

514 

587 

661 

734 

1468 

13 

87 

75 

151 

226 

302 

377 

453 

528 

604 

679 

754 

I5°9 

12 

00 

OO 

77 

155 

232 

310 

387 

465 

542 

620 

697 

775 

1550 

II 

89 

80 

J59 

239 

318 

398 

477 

557 

636 

716 

795 

159° 

10 

90 

82 

163 

245 

326 

408 

489 

57i 

652 

734 

816 

1631 

9 

91 

84 

167 

251 

334 

418 

502 

585 

669 

752 

836 

1672 

8 

92 

86 

171 

257 

343 

428 

5U 

599 

685 

771 

856 

1713 

/ 

93 

88 

175 

263 

35i 

438 

526 

614 

701 

789 

877 

1754 

6 

94 

90 

179 

269 

359 

449 

538 

628 

718 

807 

897 

1794 

5 

95 

92 

184 

275 

367 

459 

55i 

642 

734 

826 

918 

1835 

4" 

96 

94 

188 

281 

375 

469 

563 

657 

750 

844 

938 

1876 

3 

97 

96 

192 

287 

383 

479 

575 

671 

767 

862 

958 

1917 

2 

98 

98 

196 

294 

391 

489 

587 

685 

783 

88  1 

979 

1957 

I 

99 

100 

200 

300 

400 

500 

599 

699 

799 

899 

999 

I998 

0 

100 

102 

2O4 

306 

408 

5io 

612 

7H 

816 

918 

1  020 

2039 

SMITHSONIAN  TABLES. 


105 


TABLE  22. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH    MEASURES. 
Correction  for  Latitude  and  Weight  of  Mercury:     z  (0.002662  cos  2^  +  0.00239). 


Lati- 
tude. 

*. 

APPROXIMATE   DIFFERENCE   OF   HEIGHT   OBTAINED    FROM    TABLES    2O-21. 

500 

1000 

1500 

2000 

2500 

3000 

3500 

4000 

4500 

5000     5500 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0° 

+  3 

+  5 

+  8 

+  10 

4-13 

+  15 

+  18 

+  20 

4-23 

+  25 

+  28 

2 

3 

5 

8 

IO 

'3 

15 

18 

20 

23 

25 

28 

4 

•3 

5 

8 

10 

13 

15 

18 

2O 

23 

25 

28 

6 

2 

5 

7 

10 

12 

15 

17 

2O 

22 

25 

27 

8 

2 

5 

7 

10 

12 

15 

17 

2O 

22 

25   i      27    ! 

10 

+  2 

+  5 

+  7 

+  10 

+  12 

4-15 

4-17 

+  20 

+  22 

+  24    +27 

12 

2 

5 

7 

IO 

12 

H 

17 

19 

22 

24 

27 

14 

2 

5 

7 

9 

12 

14 

17 

'9 

21 

24 

26 

16 

2 

5 

7 

9 

12 

14 

16 

19 

21 

23 

26 

18 

2 

5 

7 

9 

I  I 

14 

16 

18 

20 

23 

25 

20 

+  2 

+  4 

+  7 

+   9 

+  H 

4-13 

+  16 

4-17 

+  20 

+  22 

+  24 

22 

2 

4 

6 

9 

I  [ 

13 

15 

17 

!9 

22 

24 

24 

2 

4 

6 

8 

IO 

13 

15 

17 

19 

21 

23 

26 

2 

4 

6 

8 

IO 

12 

H 

16 

18 

20 

22 

28 

2 

4 

6 

8 

IO 

12 

14 

16 

17 

19 

21 

30 

+  2 

+  4 

+  6 

4-   7 

4-   9 

+  11 

4-13 

4-15 

4-17 

+  19 

+  20 

32 

2 

4 

5 

7 

9 

II 

12 

14 

16 

18 

20 

34 

2 

3 

5 

7 

8 

ro 

12 

14 

15 

17 

T9 

36 

2 

3 

5 

6 

8 

10 

II 

13 

14 

16 

18 

33 

2. 

3 

5 

6 

8 

9 

II 

12 

H 

15 

17 

40 

+  r 

4-3 

+  4 

+   6 

4-   7 

4-  9 

+  10 

+  11 

4-13 

4-14 

+  16 

42 

i 

3 

4 

5 

7 

8 

9 

II 

12 

13 

15 

44 

i 

2 

4 

5 

6 

7 

9 

10 

II 

12 

14 

45 

-f  r 

+  2 

+  4 

4-  5 

+   6 

4-   7 

+   8 

+  10 

+  11 

+  12 

4-13 

46 

-hi 

+  2 

+  3 

4-  5 

+   6 

+   7 

+   8 

4-   9 

+  10 

+  H 

4-13 

48 

i 

2 

3 

4 

5 

6 

7 

8 

10 

II 

12 

50 

i 

2 

3 

4 

5 

6 

7 

8 

9 

IO 

II 

52 

+  i 

+  2 

+  3 

4-  3 

4-  4 

4-  5 

+   6 

4-   7 

+  8 

4-  9 

+  10 

54 

i 

2 

2 

3 

4 

5 

5 

6 

7 

8 

9 

56 

i 

I 

2 

3 

3 

4 

5 

6 

7 

7 

8 

58 

i 

I 

2 

2 

3 

4 

4 

5 

6 

6 

7 

60 

i 

I 

2 

2 

3 

3 

4 

4 

5 

5 

6 

62 

0 

+  I 

+  1 

+    2 

+     2 

+   3 

4-  3 

4-  4 

4-  4 

4-  5 

4-  5 

64 

0 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

66 

0 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3 

68 

0 

O 

I 

I 

I 

I 

2 

2 

2 

2 

3 

70 

0 

O 

I 

I 

I 

I 

I 

I 

2 

2 

2 

72 

o 

o 

O 

0 

+     I 

+     I 

+     I 

+     I 

+    I 

+    I 

4-  i 

74 

o 

o 

O 

0 

0 

O 

I 

I 

I 

+    I 

4-  i 

76 

0 

o 

0 

0 

0 

0 

O 

0 

O 

0 

0 

78 

0 

o 

0 

0 

o 

0 

O 

0 

O 

0 

0 

80 

0 

o 

0 

0 

o 

0 

O 

0 

0 

—     I 

—   i 

ITHSONIAN  TABLES 


I O6 


TABLE   22. 
DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

ENGLISH    MEASURES. 
Correction  for  Latitude  and  Weight  of   Mercury:     z  (0.002662  cos  2  <£  + 0.00239). 


Lati- 
tude. 

* 

APPROXIMATE)  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLES  2O-21. 

6000 

7000 

8000 

9000 

10000 

11000 

12000 

13000 

14000 

15000 

20000 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0° 

+  30 

+  35 

+  40 

+  45 

+  51 

+  56 

+  61 

+  66 

+  71 

+  76 

+  IOI 

2 

30 

35 

40 

45 

50 

56 

61 

66 

71 

76 

101 

4 

30 

35 

40 

45 

50 

56 

60 

65 

70 

75 

IOI 

6 

30 

35 

40 

45 

50 

55 

60 

65 

70 

75 

100 

8 

30 

35 

40 

45 

49 

54 

59 

64 

69 

74 

99 

10 

-|-29 

+  34 

+  39 

+  44 

+  49 

+  54 

+  59 

+  64 

+  68 

+  73 

+98 

12 

29 

34 

39 

43 

48 

53 

58 

63 

68 

72 

96 

14 

28 

33 

38 

43 

47 

52 

57 

62 

66 

7i 

95 

16 

28 

33 

37 

42 

46 

5i 

56 

60 

65 

70 

93 

18 

27 

32 

36 

4i 

45 

50 

55 

59 

64 

68 

9i 

20 

+  27 

+  3i 

+  35 

+  40 

+  44 

+  49 

+  53 

+  58 

+  62 

+  66 

+  89 

22 

26 

30 

34 

39 

43 

47 

52 

56 

60 

65 

86 

24 

25 

29 

33 

38 

42 

46 

50. 

54 

58 

63 

83 

26 

24 

28 

32 

36 

40 

44 

48 

52 

56 

60 

81 

28 

23 

27 

3i 

35 

39 

43 

47 

50 

54 

58 

78 

30 

+  22 

+  26 

+  3° 

+  33 

+  37 

+  41 

+  45 

+  48 

+  52 

+  56 

+  74 

32 

21 

25 

28 

32 

36 

39 

43 

46 

50 

53 

7i 

34 

2O 

24 

27 

30 

34 

37 

4i 

44 

47 

5i 

68 

36 

19 

22 

26 

29 

32 

35 

39 

42 

45 

48 

64 

33 

18 

21 

24 

27 

30 

33 

36 

39 

42 

46 

61 

40 

+  17 

+  20 

+  23 

+  26 

+  29 

+  3i 

+  34 

+  37 

+  40 

+  43 

+  57 

42 

16 

19 

21 

24 

27 

29 

32 

35 

37 

40 

53 

44 

15 

17 

2O 

22 

25 

27 

30 

32 

35 

37 

50 

45 

+  14 

+  17 

+  19 

+  22 

+  24 

+  26 

+  29 

+  3i 

+  33 

+  36 

+  48 

46 

+  14 

+  16 

+  18 

+  21 

+  23 

+  25 

+  28 

+  30 

+  32 

+  35 

+  46  I 

48 

13 

15 

17 

J9 

21 

23 

25 

27 

& 

32 

42 

50 

12 

13 

15 

17 

!9 

21 

23 

25 

27 

29 

39 

52 

+  10 

+  12 

+  14 

+  16 

+  17 

+  19 

+  21 

+  23 

+  24 

+  26 

+  35 

54 

9 

II 

13 

H 

16 

17 

J9 

20 

22 

24 

3i 

56 

8 

10 

ii 

13 

14 

15 

17 

18 

20 

21 

28 

58 

7 

9 

10 

ii 

12 

13 

15 

16 

17 

18 

24 

60 

6 

7 

8 

10 

II 

12 

13 

H 

15 

16 

21 

62 

+  5 

+  6 

+  7 

+  8 

+  9 

+  10 

+  n 

+  12 

+  13 

+  14 

+  18 

64 

5 

5 

6 

7 

8 

8 

9 

10 

II 

ii 

15 

66 

4 

4 

5 

5 

6 

7 

7 

8 

9 

9 

12 

68 

3 

3 

4 

4 

5 

5 

6 

6 

7 

7 

10 

70 

2 

2 

3 

3 

4 

4 

4 

5 

5 

5 

7 

72 

+  I 

+  2 

+  2 

+  2 

+  2 

74 

+  I 

+  I 

+  I 

+  I 

+  i 

76 

0 

0 

0 

O 

o 

78 

o 

0 

0 

0 

o 

80 

—  I 

—  I 

—  I 

—  I 

—  I 

SMITHSONIAN  TABLES. 


107 


TABLE  23. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

ENGLISH     MEASURES. 
Correction    far   an    Average    Degree    of    Humidity. 


|  Mean 
Temper- 
ature. 

APPROXIMATE  DIFFERENCE  OF  HEIGHT  OBTAINED  FROM  TABLES  2O-21. 

500 

1000 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

10000 

20000 

F. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

-20° 

O 

O 

0 

0 

0 

0 

0 

+  1 

+  1 

+  1 

+  1 

+  2 

-16 

O 

O 

0 

+  1 

+  1 

+  1 

+  1 

I 

2 

2 

2 

4 

—  12 

0 

0 

+  1 

I 

I 

2 

2 

2 

3 

3 

3 

6 

-  8 

O 

O 

I 

2 

2 

3 

3 

4 

4 

4 

9 

-  6 

O 

O 

I 

2 

2 

3 

3 

4 

4 

5 

10 

-  4 

O 

+  1 

2 

2 

3 

3 

4 

4 

5 

.  6 

ii 

—  2 

O 

I 

2 

2 

3 

4 

4 

5 

6 

6 

12 

0 

0 

I 

2 

3 

3 

4 

5 

5 

6 

7 

14 

+  2 

O 

I 

2 

3 

4 

4 

5 

6 

7 

7 

15 

4 

O 

I 

2 

2 

3 

4 

5 

6 

7 

7 

8 

16 

6 

O 

I 

2 

3 

4 

4 

5 

6 

7 

8 

9 

18 

8 

O 

I 

2 

3 

4 

5 

6 

7 

8 

9 

10 

19 

10 

+  1 

I 

2 

3 

4 

5 

6 

7 

8 

9 

10 

21 

12 

I 

I 

2 

3 

4 

6 

7 

8 

9 

10 

n 

22 

H 

I 

I 

2 

4 

5 

6 

7 

8 

9 

ii 

12 

24 

16 

I 

I 

3 

4' 

5 

6 

8 

9 

10 

n 

13 

25 

18 

I 

I 

3 

4 

5 

7 

8 

9 

ii 

12 

13 

27 

20 

I 

I 

3 

4 

6 

7 

9 

10 

ii 

13 

14 

29 

22 

I 

2 

3 

5 

6 

8 

9 

ii 

12 

14 

15 

31 

24 

I 

2 

3 

5 

7 

8 

10 

ii 

13 

15 

16 

33 

26 

I 

2 

3 

5 

7 

9 

10 

12 

14 

16 

17 

35 

28 

I 

2 

4 

6 

7 

9 

ii 

!3 

15 

17 

19 

37 

30 

I 

2 

4 

6 

8 

10 

12 

14 

16 

18 

20 

4i 

32 

I 

2 

4 

7 

9 

ii 

13 

16 

18 

20 

22 

44 

34 

I 

2 

5 

7 

10 

12 

15 

17 

19 

22 

24 

49 

36 

I 

3 

5 

8 

ii 

13 

16 

19 

21 

24 

27 

53 

38 

I 

3 

6 

9 

12 

15 

18 

21 

23 

26 

29 

59 

40 

2 

3 

6 

10 

13 

16 

19 

23 

26 

29 

32 

64 

42 

2 

4 

7 

ii 

14 

18 

21 

25 

28 

32 

35 

7i 

44 

2 

4 

8 

12 

15 

19 

23 

27 

31 

35 

39 

77 

46 

2 

4 

8 

13 

17 

21 

25 

29 

34 

38 

42 

84 

48 

2 

5 

9 

H 

18 

23 

27 

32 

37 

4i 

46 

92 

50 

2 

5 

10 

15 

20 

25 

30 

35 

40 

45 

50 

99 

52 

3 

5 

ii 

16 

21 

27 

32 

37 

43 

48 

53 

107 

54 

3 

6 

ii 

17 

23 

29 

34 

40 

46 

5i 

57 

114 

56 

3 

6 

12 

18 

24 

30 

37 

43 

49 

55 

61 

122 

58 

3 

6 

13 

19 

26 

32 

39 

45 

52 

58 

65 

130 

60 

3 

7 

14 

21 

27 

34 

4i 

48 

55 

62 

69 

137 

62 

4 

7 

14 

22 

29 

36 

43 

5i 

58 

65 

72 

145 

64 

4 

8 

15 

23 

30 

38 

46 

53 

61 

69 

76 

152 

66 

4 

8 

16 

24 

32 

40 

48 

56 

64 

72 

So 

160 

68 

4 

8 

17 

25 

34 

42 

50 

59 

67 

76 

84 

168 

70 

4 

9 

18 

26 

35 

44 

53 

61 

70 

79 

SS 

175 

72 

5 

9 

18 

27 

37 

46 

55 

64 

73 

82 

9i 

183 

76 

5 

10 

20 

30 

40 

49 

59 

69 

79 

89 

99 

198 

80 

5 

ii 

21 

32 

43 

53 

64 

75 

85 

96 

106 

213 

84 

6 

ii 

23 

34 

46 

57 

68 

So 

91 

103 

114 

228 

88 

6 

12 

24 

37 

49 

61 

73 

85 

97 

no 

122 

243 

92 

6 

13 

26 

39 

52 

65 

78 

91 

103 

116 

I29 

259 

96 

7 

14 

27 

4i 

55 

68 

82 

96 

no 

123 

137 

2/4 

SMITHSONIAN  TABLES. 


1 08 


TABLE    24. 
DETERMINATION    OF    HEIGHTS    BY    THE     BAROMETER. 

ENGLISH    MEASURES. 
Correction  for  the  Variation  of  Gravity  with  Altitude: 


. 
K 


Approx- 
imate 
difference 
,f 
height. 
I. 

HEIGHT   OF  LOWER  STATION  IN   FEET   (A0). 

0 

IOOO 

2000 

3000 

4000 

5000 

6000 

7000 

8000 

9000 

IOOOC 

(2000 

i     l;eet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

500 

0 

O 

O 

O 

O 

O 

0 

O 

O 

0 

0 

+  1 

IOOO 

o 

O 

O 

O 

0 

+  1 

+  1 

+  1 

+  1 

+  1 

+  1 

I 

1500 

O 

O 

O 

+  1 

+  1 

I 

I 

I 

I 

I 

2 

2 

2OOO 

O 

O 

+  1 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2500 

O 

+  I 

I 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3000 

o 

I 

I 

I 

2 

2 

2 

2 

3 

3 

3 

4 

3500 

+  1 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

5 

4000 

I 

I 

2 

2 

2 

3 

3 

3 

4 

4 

5 

5 

4500 

I 

I 

2 

2 

3 

3 

4 

4 

4 

5 

5 

6 

5000 

I 

2 

2 

3 

3 

4 

4 

5 

5 

6 

6 

7 

55oo 

I 

2 

3 

3 

4 

4 

5 

5 

6 

6 

7 

8 

6000 

2 

2 

3 

3 

4 

5 

5 

6 

6 

7 

7 

9 

6500 

2 

3 

3 

4 

5 

5 

6 

6 

7 

8 

8 

9 

7000 

2 

3 

4 

4 

5 

6 

6 

7 

8 

8 

9 

jo 

|    7500 

3 

3 

4 

5 

6 

6 

7 

8 

8 

9 

10 

ii 

8000 

3 

4 

5 

5 

6 

7 

8 

8 

9 

10 

ii 

12 

8500 

3 

4 

5 

6 

7 

8 

8 

9 

10 

ii 

12 

13 

9000 

4 

5 

6 

6 

7 

8 

9 

10 

ii 

12 

12 

14 

9500 

4 

5 

6 

7 

8 

9 

10 

ii 

12 

13 

13 

15 

10000 

5 

6 

7 

8 

9 

10 

ii 

ii 

12 

*3 

14 

16 

I  IOOO 

6 

7 

8 

,9 

10 

ii 

12 

13 

14 

15 

16 

18 

I2OOO 

7 

8 

9 

10 

ii 

13 

14 

15 

16 

17 

18 

21 

13000 

8 

9 

ii 

12 

13 

H 

16 

17 

18 

J9 

21 

23 

14000 

9 

ii 

12 

13 

15 

16 

17 

19 

20 

21 

23 

25 

(5000 

T  I 

12 

M 

15 

17 

18 

19 

21 

22 

24 

25 

28 

16000 

12 

14 

15 

17 

18 

20 

21 

23 

25 

26 

28 

31 

17000 

14 

15 

17 

19 

20 

22 

24 

25 

27 

28 

30 

1  8000 

16 

17 

19 

21 

22 

24 

26 

28 

30 

31 

19000 

17 

19 

21 

23 

25 

26 

28 

30 

32 

20000 

'9 

21 

23 

25 

27 

29 

31 

SMITHSONIAN  TABLES. 


TABLE   25. 

DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

METRIC    MEASURES. 
Values  of  184OO    log 


Barometric 
Pressure. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

mm. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

ni. 

300 

7428    7401 

7375 

7348 

7322 

7296 

7270 

7244 

7218 

7192  | 

310 

7166 

7140 

7H5 

7089 

7064 

7038 

7013 

6987 

6962 

6937 

320 

6912 

6887 

6862 

6838 

6813 

6789 

6764 

6740 

6715 

6691 

330 

6666 

6642 

6618 

6594 

6570 

6546 

6522 

6498 

6475 

6451  ! 

340 

6428 

6405 

6381 

6358 

6334 

6311 

6288 

6265 

6242 

6219 

350 

6196 

6173 

6151 

6128 

6106 

6083 

6o6l 

6038 

6016 

5993 

360 

597i 

5949 

5927 

5905 

5883 

5861 

5839 

5817 

5795 

5773  1 

370 

5752 

5730 

5709 

5687 

5666 

5644 

5623 

5602 

558i 

556o 

380 

5539 

•55i8 

5497 

5476 

5455 

5434 

54H 

5393 

5373 

5352 

390 

5332 

53  ii 

5291 

5270 

5250 

5229 

5209 

5189 

5169 

5H9 

400 

5129 

5109 

5089 

5069 

5049 

5029 

5010 

4990 

4971 

495i 

410 

4932 

4912 

4893 

4873 

4854 

4834 

4815 

4796 

4777 

4758  | 

420 

4739 

4720 

4701 

4682 

4663 

4644 

4625 

4606 

4588 

4569  ! 

430 

455i 

4532 

45M 

4495 

4477 

4458 

4440 

4422 

4404 

4386 

440 

4368 

4350 

4332 

4314 

4296 

4278 

4260 

4242 

4224 

4206  i 

450 

4188 

4170 

4152 

4134 

4117 

4099 

4082 

4064 

4047 

4029 

460 

4012 

3994 

3977 

3959 

3942 

3925 

3908 

3791 

3774 

3757  j 

470 

3840 

3823 

3806 

3789 

3772 

3755 

3738 

3721 

3705 

3688  ! 

480 

3672 

3655 

3639 

3622 

3606 

3589 

3573 

3556 

3540 

3523  ! 

490 

3507 

3490 

3474 

3458 

3442 

3426 

34io 

3394 

i  ->>-Q 
OO/8 

3362-! 

500 

3346 

3330 

3314 

3298 

3282 

3266 

3250 

3235 

3219 

3203  ! 

5io 

3188 

3172 

3157 

3Hi 

3126 

3110 

3095 

3079 

3064 

3048 

520 

3033 

3017 

3002 

2986 

2971 

2955 

2940 

2925 

29IO 

2895  : 

530 

2880 

2865 

2850 

2835 

2820 

2805 

2790 

2775 

2760 

2745  i 

540 

2731 

2716 

2701 

2687 

2672 

2657 

2643 

2628 

2613 

2599 

550 

2584 

2570 

2555 

2541 

2526 

2512 

2497 

2483 

2468 

2454 

560 

2440 

2426 

2411 

2397 

2383 

2369 

2355 

2341 

2327 

2313 

570 

2299 

2285 

2271 

2257 

2243 

2229 

2215 

2201 

2188 

2174 

580 

2160 

2146 

2133 

2119 

2105 

2092 

2078 

2064 

2051 

2037 

590 

2023 

2010 

1996 

1983 

1969 

1956 

1942 

1929 

i9J5 

1902 

600 

1889 

1875 

1862 

1848 

1835 

1822 

1809 

1796 

1783 

1770 

610 

1757 

1744 

I73i 

1718 

1705 

1692 

1679 

1666 

1653 

1640 

620 

1627 

1614 

1601 

1588 

1576 

1563 

1550 

1537 

1525 

1512 

630 

1499 

I486 

1474 

1461 

1448 

1436 

1423 

I4II 

1398 

1386 

640 

1373 

1361 

1348 

!336 

1323 

1311 

1298 

1286 

1273 

1261 

650 

1249 

1236 

1224 

1212 

1199 

1187 

H75 

Il63 

1151 

1139 

660 

1127 

IH5 

1103 

1091 

1079 

1067 

1055 

1043 

1031 

1019 

670 

1007 

995 

983 

971 

960 

948 

936 

924 

913 

901 

680 

889 

877 

866 

854 

842 

831 

819 

807 

796 

784 

690 

772 

761 

749 

738 

726 

7i5 

703 

692 

680 

669 

700 

657 

646 

635 

623 

612 

60  1 

589 

5/8 

567 

555 

710 

544 

533 

521 

510 

499 

487 

476 

465 

454 

443 

720 

432 

421 

410 

399 

388 

377 

366 

355 

344 

333 

730 

322 

3ii 

300 

289 

278 

267 

256 

245 

234 

224 

740 

213 

202 

192 

181 

170 

160 

149 

138 

128 

117 

750 

+  106 

+  95 

+  85 

+  74 

+  64 

4-  53 

4-  43 

+  32 

+  22 

+  ii 

760 

0 

—  10 

—  21 

-  3i 

-  42 

-  52 

-  63 

-  73 

-  83 

-  94 

770 

—  104 

-US 

-125 

-136 

—  146 

-156 

-166 

-177 

-I87 

-197 

SMITHSONIAN  TABLES. 


IIO 


TABLE   26. 
DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

METRIC    MEASURES. 
Term   for  Temperature  :    0.00367  0  X  z. 


For  temperatures  <  !  '?ve  0  Q'  V  the  values  are  to  be  <  '  hf   t  d 

Approx 

imate 

MF.AN  TEMPERATURE  OF  AIR  COLUMN  IN  CENTIGRADE  DEGREES  (0). 

differ- 

ence of 

height. 

r 

2° 

3° 

4° 

5° 

6° 

7° 

8° 

9° 

10° 

20° 

30° 

40° 

Z. 

m. 

m. 

m. 

ni. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

ni. 

m. 

m. 

IOO 

O 

I 

I 

I 

2 

2 

3 

3 

3 

4 

7 

II 

15 

2OO 

I 

I 

2 

3 

4 

4 

5 

6 

7 

7 

15 

22 

29 

300 

I 

2 

3 

4 

6 

7 

8 

9 

10 

ii 

22 

33 

44 

400 

I 

3 

4 

6 

7 

9 

10 

12 

U 

15 

29 

44 

59 

500 

2 

4 

6 

7 

9 

ii 

13 

15 

17 

18 

37 

55 

73 

600 

2 

4 

7 

9 

ii 

13 

15 

18 

20 

22 

44 

66 

88 

700 

3 

5 

8 

10 

13 

15 

18 

21 

23 

26 

51 

77 

103 

800 

3 

6 

9 

12 

15 

18 

21 

23 

26 

29 

59 

88 

117 

900 

3 

7 

10 

13 

17 

20 

23 

26 

30 

33 

66 

99 

132 

1000 

4 

7 

ii 

15 

18 

22 

26 

29 

33 

37 

73 

IIO 

147 

I  IOO 

4 

8 

12 

16 

20 

24 

28 

32 

36 

40 

81 

121 

161 

1200 

4 

9 

13 

18 

22" 

26 

31 

35 

40 

44 

88 

I32 

176 

1300 

5 

10 

14 

19 

24 

29 

33 

38 

43 

48 

95 

143 

191 

1400 

5 

10 

15 

21 

26 

31 

36 

46 

51 

103 

154 

206 

1500 

6 

ii 

17 

22 

28 

33 

39 

44 

50 

55 

IIO 

165 

220 

1600 

6 

12 

18 

23 

29 

35 

47 

53 

59 

117 

I76 

235 

1700 

6 

J2 

19 

25 

31 

37 

44 

50 

56 

62 

125 

I87 

250 

1800 

7 

13 

20 

26 

33 

40 

46 

53 

59 

66 

132 

198 

264 

1900 

7 

H 

21 

28 

35 

42 

49 

56 

63 

70 

139 

209 

279 

2000 

7 

15 

22 

29 

37 

44 

5I 

59 

66 

73 

147 

2  2O 

294 

2IOO 

8 

15 

23 

31 

39 

46 

54 

62 

69 

77 

154 

23I 

308 

2200 

8 

16 

24 

32 

40 

48 

57 

65 

73 

81 

161 

242 

323 

2300 

8 

17 

25 

34 

42 

59 

68 

76 

84 

169 

253 

338 

2400 

9 

18 

26 

35 

44 

53 

62 

70 

79 

88 

176 

264 

352 

2500 

9 

18 

28 

37 

46 

55 

64 

73 

83 

92 

184 

275 

367 

2600 

10 

19 

29 

38 

48 

57 

67 

76 

86 

95 

191 

286 

382 

2700 

10 

20 

30 

40 

50 

59 

69 

79 

89 

99 

198 

297 

396 

2800 

10 

21 

31 

62 

72 

82 

92 

103 

206 

308 

411 

2900 

1  1 

21 

32 

43 

53 

64 

75 

85 

96 

1  06 

213 

319 

426 

3000 

II 

22 

33 

44 

55 

66 

77 

88 

99 

IIO 

220 

330 

440 

3100 

II 

23 

34 

46 

57 

68 

80 

9r 

1  02 

114 

228 

341 

455 

3200 

12 

23 

35 

47 

59 

70 

82 

94 

106 

117 

235 

352 

470 

33oo 

12 

24 

36 

48 

61 

73 

85 

97 

109 

121 

242 

363 

484 

3400 

12 

25 

37 

50 

62 

75 

87 

IOO 

112 

125 

250 

374 

499 

3500 

13 

26 

39 

51 

64 

77 

9° 

103 

116 

128 

257 

385 

514 

3600 

13 

26 

40 

53 

66 

79 

92 

106 

119 

132 

264 

396 

528 

3700 

14 

27 

41 

54 

68 

81 

95 

109 

122 

136 

272 

407 

543 

3800 

28 

42 

56 

70 

84 

98 

112 

126 

139 

279 

418 

558 

3900 

H 

29 

43 

57 

72 

86 

IOO 

H5 

I29 

143 

286 

429 

573 

4000 

15 

29 

44 

59 

73 

88 

103 

117 

I32 

147 

294 

440 

587 

5000 

i3 

37 

55 

92 

IIO 

128 

147 

165 

183 

367 

551 

734 

6000 

22 

44 

66 

88 

1  10 

132 

154 

I76 

I98 

220 

440 

66  1 

88  1 

7000 

26 

77 

103 

128 

154 

180 

206 

23I 

257 

771 

1028 

SMITHSONIAN  TABLES. 


Ill 


TABLE  27. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 

METRIC    MEASURES. 
Correction    for    Humidity:     Values    of  1OOOO  ft. 


Mean 
!  Vapor 
Pressure. 

._!£ 

MEAN  BAROMETRIC  PRESSURE  IN  MILLIMETRES  (' 

B+£ 

±    \ 

2 

500 

520 

540 

560 

580 

600 

620 

640 

660 

680 

700 

720 

740 

760 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

| 

8 

7 

7 

7 

7 

6 

6 

6 

6 

6 

5 

5 

5 

5 

2 

15 

15 

H 

14 

13 

13 

12 

12 

II 

II 

II 

n 

10 

10 

3 

23 

22 

21 

20 

20 

19 

18 

18 

17 

17 

16 

16 

15 

15 

4 

30 

29 

28 

27 

26 

25 

24 

24 

23 

22 

22 

21 

20 

20 

5 

38 

36 

35 

34 

33 

31 

30 

30 

29 

28 

27 

26 

26 

25 

6 

45 

44 

42 

4i 

39 

38 

37 

35 

34 

33 

32 

32 

3i 

30 

7 

53 

5i 

49 

47 

46 

44 

43 

4i 

40 

39 

38 

37 

36 

35 

8 

60 

58 

56 

54 

52 

50 

49 

47 

46 

44 

43 

42 

4i 

40 

9 

68 

65 

63 

61 

59 

57 

55 

53 

52 

50 

49 

47 

46. 

45 

10 

76 

73 

70 

68 

65 

63 

61 

59 

57 

56 

54 

53 

5i 

50 

ii 

83 

80 

77 

74 

72 

69 

67 

65 

63 

61 

59 

58 

56 

55 

12 

91 

87 

84 

81 

78 

76 

73 

7i 

69 

67 

65 

63 

61 

60 

13 

98 

95 

9i 

88 

85 

82 

79 

77 

74 

72 

70 

68 

66 

65 

14 

106 

102 

98 

95 

9i 

88 

85 

83 

80 

78 

76 

74 

72 

70 

15 

H3 

I09 

105 

101 

98 

95 

9i 

89 

86 

83 

Si 

79 

77 

75 

16 

121 

116 

112 

108 

104 

101 

98 

94 

92 

89 

86 

84 

82 

80 

17 

I29 

124 

119 

H5 

in 

107 

104 

100 

97 

94 

92 

89 

87 

85 

18 

136 

131 

126 

122 

117 

H3 

no 

106 

103 

100 

.  97 

95 

92 

90 

*9 

144 

138 

133 

128 

124 

120 

116 

112 

109 

106 

103 

IOO 

97 

95 

20 

151 

145 

I4O 

135 

130 

126 

122 

IlS 

H5 

in 

108 

105 

102 

99 

21 

^59 

153 

147 

142 

137 

132 

128 

124 

1  20 

117 

H3 

no 

107 

104 

22 

1  66 

1  60 

154 

149 

H3 

J39 

134 

130 

126 

122 

119 

116 

112 

109 

23 

174 

167 

161 

155 

150 

145 

I4O 

136 

132 

128 

124 

121 

117 

114 

24 

181 

174 

168 

162 

156 

151 

146 

142 

137 

133 

130 

I26 

I23 

119 

25 

189 

182 

175 

169 

163 

157 

152 

148 

143 

139 

135 

131 

128 

124 

26 

197 

189 

182 

175 

169 

164 

159 

154 

149 

145 

140 

137 

133 

129 

27 

204 

196 

189 

182 

176 

170 

165 

159 

155 

150 

146 

142 

138 

134 

28 

212 

204 

196 

I89 

182 

176 

171 

165 

160 

156 

151 

147 

143 

J39  ; 

29 

2I9 

211 

203 

I96 

189 

183 

177 

171 

166 

161 

157 

152 

I48 

144 

30 

227 

218 

210 

203 

196 

189 

183 

177 

172 

167 

162 

158 

153 

149 

3i 

234 

225 

217 

209 

202 

195 

I89 

183 

178 

172 

167 

163 

158 

154 

32 

242 

233 

224 

216 

209 

202 

195 

I89 

183 

178 

173 

168 

I63 

159 

33 

249 

240 

231 

223 

215 

208 

201 

195 

189 

183 

178 

173 

169 

164 

34 

257 

247 

238 

230 

222 

214 

207 

201 

195 

189 

184 

179 

174 

169 

35 

265 

254 

245 

236 

228 

22O 

213 

207 

200 

195 

189 

184 

179 

174 

36 

272 

262 

252 

243 

235 

227 

219 

213 

206 

200 

194 

189 

!84 

179  ; 

37 

280 

269 

259 

250 

241 

233 

226 

2I9 

212 

206 

200 

194 

189 

184 

38 

287 

276 

266 

257 

248 

239 

232 

224 

218 

211 

205 

200 

194 

189 

'  39 

295 

283 

273 

263 

254 

246 

238 

230 

223 

217 

211 

205 

199 

194 

40 

302 

291 

280 

270 

26l 

252 

244 

236 

229 

222 

216 

210 

204 

199 

SMITHSONIAN  TABLES. 


112 


TABLE 

BAROMETER. 


27, 


DETERMINATION    OF    HEIGHTS    BY    THE 

METRIC    MEASURES. 
Correction   for   Humidity:    looooygxz. 

Top  argument:     Values  of  10000  ft  obtained  from  page  112. 
Side  argument :     Approximate  difference  of  height  (z). 


Approximate 
Difference 
of  Height. 
Z. 

10000^8. 

25 

50 

75 

100 

125 

150 

175 

200 

225 

250 

275 

300 

ni. 

in. 

m. 

m. 

m. 

m. 

m. 

in. 

m. 

m. 

m. 

m. 

m. 

100 

0-3 

0-5 

0.8 

I.O 

i-3 

1-5 

1.8 

2.0 

2-3 

2-5 

2.8 

3-0 

2OO 

o-5 

I.O 

1.5 

2.0 

2-5 

3-0 

3.5 

4.0 

4-5 

5.0 

5.5 

6.0 

300 

0.8 

1-5 

2.3 

3-0 

3.8 

4-5 

5.3 

6.0 

6.8 

7-5 

8.3 

9-0 

400 

I.O 

2.0 

3-0 

4.0 

5-0 

6.0 

7.0 

8.0 

9-0 

IO.O 

II.O 

12.0 

500 

!-3 

2.5 

3-8 

5-o 

6-3 

7-5 

8.8 

IO.O 

H.3 

12.5 

13.8 

15.0 

600 

i-5 

3-0 

4-5 

6.0 

7-5 

9.0 

10.5 

12.0 

13.5 

15.0 

16.5 

18.0 

700 

1.8 

3-5 

5-3 

7.0 

8.8 

10.5 

12.3 

14.0 

15.8 

17.5 

19.3 

21.0 

800 

2.O 

4.0 

6.0 

8.0 

IO.O 

12.0 

14.0 

16.0 

18.0 

20.0 

22.0 

24.0 

900 

2-3 

4-5 

6.8 

9.0 

II-3 

13.5 

15-8 

18.0 

20.3 

22.5 

24.8 

27.0 

1000 

2.5 

5-0 

7-5 

IO.O 

12.5 

15.0 

17.5 

20.0 

22.5 

25.0 

27-5 

30.0 

1  100 

2.8 

5-5 

8-3 

II.  0 

13-8 

I6.5 

19-3 

22.0 

24.8 

27-5 

30.3 

33.0 

1200 

3-o 

6.0 

9.0 

12.  0 

15-0 

18.0 

21.0 

24.O 

27.0 

30.0 

33-0 

36.0 

1300 

3-3 

6-5 

9.8 

13.0 

16.3 

!9-5 

22.8 

26.O 

29.3 

32.5 

35-8 

39-o 

1400 

3-5 

7.0 

10.5 

14.0 

17.5 

21.  0 

24.5 

28.0 

3L5 

35-0 

38.5 

42.0 

1500 

3-8 

7-5 

n-3 

15.0 

18.8 

22.5 

26.3 

30.0 

33.8 

37-5 

4L3 

45-0 

1600 

4.0 

8.0 

12.0 

16.0 

20.  o 

24.O 

28.0 

32.0 

36.0 

40.0 

44.o 

48.0 

1700 

4-3 

8.5 

12.8 

17.0 

21.3 

25.5 

29.8 

34-0 

38.3 

42.5 

46.8 

51.0 

1800 

4-5 

9.0 

13-5 

18.0 

22.5 

27.0 

31.5 

36.0 

40.5 

45-0 

49-5 

54-0 

1900 

4.8 

9-5 

14-3 

19.0 

23.8 

28.5 

33-3 

38.0 

42.8 

47-5 

52.3 

57.0 

2000 

5-o 

IO.O 

15.0 

20.0 

25.0 

30.0 

35-0 

40.0 

45-0 

50.0 

55-0 

60.0 

2100 

5-3 

10.5 

15-8 

21.0 

26.3 

31-5 

36.8 

42.0 

47-3 

52.5 

57-8 

63.0 

2200 

5-5 

II.  0 

I6.5 

22.0 

27-5 

33-o 

38.5 

44.0 

49-5 

55-0 

60.5 

66.0 

2300 

5-8 

11.5 

17.3 

23.0 

28.8 

34-5 

40.3 

46.0 

51-8 

57-5 

63.3 

69.0 

24OO 

6.0 

12.0 

18.0 

24.O 

30.0 

36.0 

42.0 

48.0 

54-0 

60.0 

66.0 

72.0 

2500 

6-3 

12.5 

18.8 

25.0 

31.3 

37-5 

43-8 

50.0 

56.3 

62.5 

68.8 

75-0 

2600 

6-5 

13.0 

19-5 

26.0 

32.5 

39-0 

45-5 

52.0 

58.5 

65.0 

71.5 

78.0 

2700 

6.8 

13.5 

20.3 

27.0 

33-8 

40.5 

47-3 

54-0 

60.8 

67.5 

74-3 

81.0 

2800 

7.0 

14.0 

21.0 

28.0 

35-0 

42.0 

49-0 

56.0 

63.0 

70.0 

77-0 

84.0 

2900 

7-3 

14.5 

21.8 

29.0 

36.3 

43-5 

50.8 

58.0 

65-3 

72-5 

79-8 

87.0 

3000 

7-5 

15.0 

22.5 

30.0 

37-5 

45-0 

52.5 

60.0 

67.5 

75-0 

82.5 

90.0 

3100 

7-8 

15-5 

23.3 

31.0 

38.8 

46.5 

54-3 

62.0 

69.8 

77-5 

85.3 

93.0 

3200 

8.0 

16.0 

24.0 

32.0 

40.0 

48.0 

56.0 

64.0 

72.0 

80.0 

88.0 

96.0 

3300 

8-3 

16.5 

24.8 

33-0 

41-3 

49-5 

57-8 

66.0 

74-3 

82.5 

90.8 

99-0 

3400 

8-5 

17.0 

25.5 

34.0 

42.5 

51.0 

59-5 

68.0 

76.5 

85.0 

93-5 

102.0 

3500 

8.8 

17-5 

26.3 

35-0 

43-8 

52.5 

61.3 

70.0 

78.8 

87.5 

96.3 

105.0 

3600 

9.0 

18.0 

27.0 

36.0 

45-0 

54-o 

63.0 

72.0 

81.0 

90.0 

99-o 

108.0 

3700 

9-3 

18.5 

27.8 

37-0 

46.3 

55-5 

64.8 

74.0 

83.3 

92.5 

101.8 

III.O 

3800 

9-5 

19.0 

28.5 

38.0 

47-5 

57.o 

66.5 

76.0 

85.5 

95-0 

104.5 

114.0 

3900 

9.8 

J9-5 

29.3 

39-0 

48.8 

58.5 

68.3 

78.0 

87.8 

97-5 

107.3 

117.0 

4000 

IO.O 

20.0 

30.0 

40.0 

50.0 

60.0 

70.0 

80.0 

90.0 

1  00.0 

I  IO.O 

I2O.O 

5000 

12.5 

25.0 

37.5 

50.0 

62.5 

75-0 

87.5 

100.0 

112.5 

125.0 

137.5 

150.0 

6000 

15-0 

30.0 

45-0 

60.0 

75-0 

90.0 

105.0 

120.0 

135.0 

150.0 

165.0 

ISO.O 

7000 

17-5 

35-0 

52.5 

70.0 

87.5 

105.0 

122.5 

140.0 

157.5 

175.0 

192.5 

210.0 

SMITHSONIAN  TABLES. 


TABLE    28. 

DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER 

METRIC    MEASURES. 
Correction    for    Latitude    and     Weight    of    Mercury:     z  (0.002662  cos  2  ^  +  0.00239). 


Approximate 
difference 
of  Height. 

LATITUDE  (0). 

Z. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

45° 

50° 

55° 

60° 

65° 

70° 

75° 

metres. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

m. 

100 

I 

I 

O 

O 

O 

O 

o 

o 

O 

O 

0 

0 

0 

0 

O 

O 

2OO 

I 

O 

O 

O 

O 

O 

O 

o 

300 
400 

2 
2 

2 
2 

2 

I 

2 

2 

2 

i 

I 

I 

I 

I 

O 

I 

O 

o 

O 

o 

O 
0 

o 
o 

500 

3 

3 

2 

2 

2 

2 

2 

2 

I 

I 

I 

o 

o 

0 

600 

3 

3 

3 

3 

3 

2 

2 

2 

2 

I 

I 

o 

o 

0 

700 

4 

4 

3 

3 

3 

3 

3 

2 

2 

2 

I 

o 

o 

o 

800 

4 

4 

4 

4 

4 

3 

3 

3 

2 

2 

2 

I 

o 

'  o 

900 

5 

5 

4 

4 

4 

4 

3 

3 

3 

2 

2 

I 

o 

o 

1000 

5 

5 

5 

5 

4 

4 

4 

3 

3 

2 

2 

I 

o 

o 

1  100 

6 

6 

5 

5 

5 

5 

4 

4 

3 

3 

2 

2 

o 

o 

1200 

6 

6 

6 

6 

5 

5 

4 

4 

3 

3 

2 

2 

o 

o 

1300 

7 

7 

6 

6 

6 

5 

5 

4 

4 

3 

3 

2 

0 

o 

1400 

7 

7 

7 

7 

6 

6 

5 

5 

4 

3 

3 

2 

0 

o 

1500 

8 

8 

7 

7 

7 

6 

6 

5 

4 

4 

3 

2 

2 

I 

0 

1600 

8 

8 

8 

8 

7 

7 

6 

5 

5 

4 

3 

2 

2 

I 

0 

1700 

9 

9 

8 

8 

8 

7 

6 

6 

5 

4 

3 

3 

2 

I 

0 

1800 

9 

9 

9 

8 

8 

7 

7 

6 

5 

4 

3 

3 

2 

I 

0 

1900 

10 

10 

9 

9 

8 

8 

7 

6 

5 

5 

4 

3 

2 

I 

o 

2000 

10 

10 

10 

9 

9 

8 

7 

7 

6 

5 

4 

3 

2 

I 

I 

o 

2100 

ii 

ii 

10 

10 

9 

9 

8 

7 

6 

5 

4 

3 

2 

I 

I 

o 

22OO 

ii 

ii 

ii 

10 

10 

9 

8 

7 

6 

5 

4 

3 

2 

I 

I 

o 

2300 

12 

12 

ii 

ii 

10 

9 

9 

8 

7 

5 

4 

3 

2 

2 

I 

o 

24OO 

12 

12 

12 

ii 

ii 

10 

9 

8 

7 

6 

5 

4 

3 

2 

I 

o 

2500 

13 

J3 

12 

12 

ii 

IO 

9 

8 

7 

6 

5 

4 

3 

2 

I 

o 

2600 

13 

13 

13 

12 

12 

II 

IO 

9 

7 

6 

5 

4 

3 

2 

I 

o 

2700 

14 

14 

*3 

13 

12 

II 

10 

9 

8 

6 

5 

4 

3 

2 

I 

o 

2800 

14 

14 

14 

13 

12 

II 

IO 

9 

8 

7 

5 

4 

3 

2 

I 

0 

2900 

15 

15 

14 

14 

13 

12 

II 

IO 

8 

7 

6 

4 

3 

2 

I 

0 

3000 

15 

15 

15 

14 

13 

12 

II 

IO 

9 

7 

6 

4 

3 

2 

I 

0 

3100 

16 

16 

15 

15 

14 

13 

12 

IO 

9 

7 

6 

5 

3 

2 

I 

0 

3200 

16 

16 

16 

15 

14 

13 

12 

II 

9 

8 

6 

5 

3 

2 

I 

0 

3300 

17 

17 

16 

15 

15 

14 

12 

II 

9 

8 

6 

5 

3 

2 

I 

o 

3400 

i/ 

17 

17 

16 

15 

14 

13 

II 

10 

8 

7 

5 

4 

2 

I 

o 

3500 

18 

18 

17 

16 

16 

14 

13 

12 

10 

8 

7 

5 

4 

2 

I 

o 

3600 

18 

18 

18 

17 

16 

15 

13 

12 

10 

•9 

7 

5 

4 

2 

I 

o 

3700 

«9 

19 

18 

17 

16 

15 

14 

12 

ii 

9 

7 

5 

4 

3 

I 

0 

3800 

19 

19 

19 

18 

17 

16 

14 

13 

ii 

9 

7 

6 

4 

3 

I 

0 

3900 

20 

20 

19 

18 

17 

16 

15 

13 

ii 

9 

8 

6 

4 

3 

I 

0 

4000 

20 

2O 

20 

19 

18 

16 

15 

T3 

ii 

IO 

8 

6 

4 

3 

I 

o 

4500 

23 

23 

22 

21 

20 

18 

17 

15 

13 

ii 

9 

7 

5 

3 

2 

o 

5000 

25 

25 

24 

23 

22 

21 

!9 

17 

14 

12 

10 

7 

5 

3 

2 

o 

5500 

28 

28 

27 

26 

24 

23 

20 

18 

16 

13 

ii 

8 

6 

4 

2 

0 

6000 

30 

30 

29 

28 

27 

25 

22 

20 

17 

14 

12 

9 

6 

4 

2 

1 

6500 

33 

33 

32 

31 

29 

27 

24 

21 

J9 

16 

13 

10 

7 

4 

2 

I 

7000 

35 

35 

34 

33 

31 

29 

26 

23 

20 

17 

13 

10 

7 

5 

2 

T 

! 

SMITHSONIAN  TABLES. 


114 


TABLE  29. 
DETERMINATION    OF    HEIGHTS    BY    THE    BAROMETER. 

METRIC    MEASURES. 

Correction  for  the  variation  of  gravity  with  altitude:        ^      £    °' 

K. 


Approxi- 
mate 
difference 
of  height. 
Z. 

HEIGHT  OF  I<OWER  STATION  IN  METRES   (^0)- 

0 

200 

400 

600 

800 

1000 

1200 

1400 

1600 

1800 

2000 

2500 

3000 

4000 

metres. 

m. 

ni. 

m. 

m. 

m. 

in. 

m. 

ni. 

m. 

m. 

m. 

m. 

m. 

m. 

200 

o 

o 

o 

O 

o 

O 

o 

O 

o 

0 

o 

o 

O 

o 

300 

o 

o 

o 

O 

o 

O 

o 

O 

o 

O 

o 

o 

o 

o 

400 

o 

o 

o 

O 

o 

o 

0 

0 

o 

O 

0 

o 

o 

I 

500 

o 

0 

0 

0 

0 

0 

o 

0 

0 

0 

o 

o 

I 

I 

600 

o 

0 

0 

O 

o 

o 

o 

O 

o 

0 

o 

I 

i 

700 

o 

0 

o 

o 

o 

o 

o 

O 

o 

0 

I 

I 

I 

800 

o 

o 

o 

o 

o 

o 

o 

O 

I 

I 

I 

I 

900 

o 

<  1 

o 

0 

o 

o 

0 

I 

I 

I 

I 

I 

1000 

0 

0 

0 

0 

0 

0 

I 

I 

I 

I 

I 

I 

IIOO 

o 

0 

0 

o 

0 

I 

I 

I 

I 

I 

I 

2 

1200 

o 

O 

o 

o 

I 

I 

I 

I 

I 

i 

I 

2 

1300 

o 

O 

o 

I 

I 

I 

I 

I 

I 

i 

I 

2 

1400 

o 

O 

o 

I 

I 

I 

I 

I 

I 

i 

2 

2 

1500 

o 

0 

I 

I 

I 

I 

I 

I 

I 

2 

2 

2 

1600 

o 

I 

I 

I 

I 

I 

I 

I 

2 

2 

2 

1700 

T  *4r\o 

o 

I 

I 

I 

I 

I 

I 

2 

2 

2 

3 

1  OCXJ 

1900 

I 

I 

2 

2 
2 

2 
2 

2 

2 

2 
2 

3 
3 

2000 

I 

I 

I 

I 

I 

I 

2 

2 

2 

2 

2 

3 

3 

2IOO 

I 

I 

I 

I 

I 

I 

2 

2 

2 

2 

2 

3 

3 

22OO 

I 

I 

I 

I 

.   I 

2 

2 

2 

2 

2 

2 

3 

4 

2300 

I 

I 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

4 

2400 

I 

I 

I 

2 

2 

2 

2 

2 

2 

2 

3 

3 

4 

2500 

I 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

4 

2600 

I 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

4 

4 

2700 

I 

I 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

5 

2800 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

5 

2900 

I 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

4 

4 

5 

3000 

I 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

3100 

2 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

3200 

2 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

5 

6 

3300 

2 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

4 

5 

6 

3400 

2 

2 

2 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

6 

3500 

2 

2 

2 

3 

3 

3 

3 

3 

4 

4 

4 

5 

5 

6 

3600 

2 

2 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

7 

3700 

2 

2 

3 

3 

3 

3 

4 

4 

4 

4 

4 

5 

6 

7 

3800 

2 

3 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

6 

7 

3900 

2 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

5 

6 

7 

4000 

3 

3 

3 

3 

4 

4 

4 

4 

5 

5 

5 

6 

6 

8 

4500 

3 

3 

4 

4 

4 

5 

5 

5 

5 

6 

6 

7 

7 

9 

5000 

4 

4 

5 

5 

5 

5 

6 

6 

6 

7 

7 

8 

9 

10 

55oo 

5 

5 

5 

6 

6 

6 

7 

7 

8 

8 

8 

9 

10 

12 

6000 

6 

6 

6 

7 

7 

8 

8 

8 

9 

9 

9 

10 

ii 

13 

6500 

7 

7 

7 

8 

8 

9 

9 

9 

10 

10 

ii 

12 

13 

15 

7000 

8 

8 

9 

9 

9 

10 

10 

ii 

ii 

12 

12 

13 

14 

16 

TABLES. 


TABLE  30. 

DIFFERENCE    OF   HEIGHT    CORRESPONDING   TO    A    CHANGE    OF 
O.1     INCH    IN    THE    BAROMETER. 

ENGLISH    MEASURES. 


Baro- 
metric 
Pres- 
sure. 

i 

MEAN  TEMPERATURE   OF  THE  AIR  IN   FAHRENHEIT  DEGREES. 

30° 

35° 

40° 

45° 

50° 

55° 

60° 

65° 

70° 

75° 

80°       85° 

Inches 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet.      Feet,  i 

22.0 

119.2 

120.5 

121.  8 

123.1 

124.4 

125-8 

I27.I 

128.5 

129.8 

131.2 

132.5     133-91 

.2 

II8.2 

119.4 

120.7 

122.0 

123-3 

124.7 

126.0 

127.3 

128.7 

130.0 

I3I.3 

132.7 

•  4 

117.1 

118.3 

119.6 

120.9 

122.2 

123.6 

124.9 

126.2 

127-5 

128.8 

130.2 

131-5  i 

.6 

116.1 

II7-3 

II8.6 

II9.8 

121.  1 

122.5 

123.8 

I25.I 

126.4 

127.7 

129.0 

130.3 

.8 

115.0 

116.3 

II7-5 

II8.8 

1  2O.  I 

I2I.4 

122.7 

124.0 

125-3 

126.6 

127.9 

129.2 

23.0 

114.0 

II5-3 

116.5 

II7.8 

II9.0 

120.3 

121.  6 

122.9 

124.2 

125-5 

126.8 

128.1  i 

.2 

113.1 

II4-3 

II5-5 

II6.8 

IlS.O 

II9-3 

1  20.  6 

121.  8 

123.1 

124.4 

125.7 

127.0 

•4 

112.  1 

II3-3 

II4-5 

II5.8 

II7.O 

118.3 

II9-5 

120.8 

122.  1 

123-3 

124.6 

I25-9  J 

.6 

III.  I 

112.3 

H3.5 

II4.8 

116.0 

II7-3 

118.5 

119.8 

121.  0 

122.3 

123.5 

124.8  ! 

.8 

1  10.  2 

111.4 

112.  6 

II3.8 

115.1 

116.3 

II7-5 

118.8 

120.0 

121.3 

122.5 

123.8! 

24.0 

109.3 

110.5 

in.  7 

II2.9 

114.1 

II5-3 

116.5 

117.8 

II9.0 

120.2 

I2I.5 

122.7 

.2 

108.4 

J09.5 

110.7 

IIT.9 

113.1 

114.4 

115.6 

116.8 

II8.0 

II9.2 

120.5 

121.7  • 

•4 

107-5 

108.6 

109.8 

III.O 

112.  2 

II3-4 

114.6 

115.9 

II7.I 

II8.3 

II9-5 

120.7 

.6 

106.6 

107.8 

108.9 

IIO.  I 

III.  3 

II2.5 

113-7 

114.9 

116.1 

117.3    Il8-5 

119.7 

.8 

105.8 

106.9 

108.1 

109.2 

IIO.4 

in.  6 

II2.8 

114.0 

115.2 

116.4 

117.6 

1  1.8.  8 

25.0 

104.9 

1  06.0 

107.2 

108.3 

109.5 

110.7 

111.9 

113.1 

114.2 

115.4 

II6.6 

117.8 

.2 

I04.I 

105.2 

106.3 

107.5 

108.7 

109.8 

III.O 

112.  2 

II3-3 

114.5 

U5-7 

116.9 

•4 

103-3 

104.4 

105.5 

106.6 

107.8 

109.0 

1  10.  1 

III.3 

112.4 

113.6 

II4.8 

116.0 

.6 

102.5 

103.6 

104.7 

105.8 

IO7.O 

108.1 

109.3 

IIO.4 

in.  6 

112.7 

II3-9 

115.1 

.8 

101.7  '  102.8 

103.9 

105.0 

106.1 

107.3 

108.4 

TO9.6 

110.7 

111.9 

II3.0 

114.2 

26.0 

100.9 

102.0 

103.1 

104.2 

105.3 

106.4 

107.6 

108.7 

109.9 

III.O 

II2.I 

«3-3 

.2 

IOO.I 

IOI.2 

102.3 

103.4 

104.5 

105.6 

106.8 

107.9 

109.0 

1  10.  1 

111.3 

112.4 

•4 

99.4    100.4 

101.5 

102.6 

103.7 

104.8 

106.0 

I07.I 

108.2 

109.3 

110.4 

in.  6 

.6 

98.6 

99-7 

100.7 

101.8 

102.9 

104.0 

105.2 

106.3 

107.4 

108.5 

109.6 

110.7 

.8 

97-9 

98.9 

100.0 

IOI.I 

102.2 

103.3 

104.4 

105.5 

106.6 

107.7 

108.8 

109.9 

27.0 

97.1 

98.2 

99.2 

100.3 

IOI.4 

102.5 

103.6 

104.7 

105-8 

106.9 

108.0 

109.1 

.2 

96.4 

97-5 

98.5 

99.6 

100.7 

101.8 

102.8 

103.9 

105.0 

106.  i 

107.2 

108.3  i 

4 

95-7 

96.8 

97.8 

98.9 

99-9 

IOI.O 

IO2.I 

IO3.2 

104.2 

105.3 

106.4 

107-5 

.6 

95-o 

96.1 

97.1 

-98.1 

99-2 

100.3 

IOI.3 

IO2.4 

103.5 

104.6 

105.6 

106.7 

.8 

94-3 

95-4 

96.4 

97-4 

98.5 

99.6 

100.6 

IOI.7 

102.7 

103.8 

104.9 

105.9 

28.0 

93-7 

94-7 

95-7 

96.7 

97-8 

98.8 

99-9 

IOI.O 

102.0 

103.1 

104.1 

105.2  ' 

.2 

93-o 

94.0 

95-o 

96.1 

97.1 

98.1 

99-2 

100.2 

IOI.3 

102.3 

103.4 

104.4 

•4 

92.4 

93-4 

94-4 

95.4 

96.4 

97.5 

98-5 

99-5 

100.6 

101.6 

102.7 

103.7  ! 

.6 

91.7 

92.7 

93-7 

94.7 

95-7 

96.8 

97-8 

98.8 

99-9 

100.9 

101.9 

103.0 

.8 

91.1 

92.1 

93-1 

94.1 

95-i 

96.1 

97.1 

98.2 

99.2 

IOO.2 

IOI.2 

102.3 

29.0 

90.4 

91.4 

92.4 

93-4 

94-4 

95.4 

96-5 

97.5 

98-5 

99-5 

100.5 

101.6 

.2 

89.8 

90.8 

91.8 

92.8 

93-8 

94-8 

95-8 

96.8 

97-8 

98.8 

99-9 

100.9 

•4 

89.2 

90.2 

91.1 

92.1 

93-i 

94.1 

95-i 

96.1 

97.1 

98.2 

99.2 

100.2 

.6 

88.6 

89.6 

9J-5 

92-5 

93-5 

94-5 

95-5 

96.5 

97-5 

98-5 

99-5 

.8 

88.0 

89.0 

89.9 

90.9 

91.9 

92.9 

93-9 

94-9 

95-8 

96.8 

97.8 

98.8 

30.0 

87.4 

88.4 

89.3 

90.3 

9I-3 

92-3 

93.2 

94-2 

95-2 

96.2 

97-2 

98.2 

.2 

86.8 

87.8 

88.7 

89.7 

90.7 

91.7 

92.6 

93-6 

94.6 

95.6 

96.5 

97.5! 

•4 

86.3 

87.2 

88.2 

89.1 

90.1 

91.1 

92.0 

93-o 

94-0 

94.9 

95-9 

96.9! 

.6 

85-7 

86.7 

87.6 

88.5 

89-5 

90-5 

91.4 

92.4 

93-3 

94-3 

95-3 

96.2 

.8 

85.2 

86.1 

87.0 

88.0 

88.9 

89.9 

90.8 

91.8 

92.7 

93-7 

94-7 

95-6 

SMITHSONIAN  TABLES. 


Tl6 


TABLE  31. 

DIFFERENCE   OF    HEIGHT    CORRESPONDING    TO  A    CHANGE    OF 
1     MILLIMETRE    IN    THE    BAROMETER. 

METRIC    MEASURES. 


MEAN  TEMPERATURE  OF  THE  AIR  IN   CENTIGRADE  DEGREES. 

Barometric 

Pressure. 

-2° 

0° 

2° 

4° 

6° 

8° 

10° 

12° 

14° 

16° 

mm. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

760 

10.48 

10-57 

10.65 

10.73 

10.81 

10.89 

10.98 

II.  06 

H.I5 

11.23 

750 

10.62 

10.71 

10.79 

10.87 

10-95 

11.04 

11.13 

II.  21 

11.30 

11.38 

740 

10.77 

10.85 

10.93 

II.  O2 

II.  10 

11.19 

11.28 

11.36 

n-45 

11-54 

730 

10.91 

11.00 

11.08 

11.17 

11.26 

11-35 

11-43 

11.52 

ii.  61 

11.70 

720 

1  1.  06 

11.15 

11.24 

11.32 

11.42 

11.51 

11-59 

11.68 

11.77 

11.86 

710 

11.22 

11.31 

II.4O 

11.48 

11.58 

11.67 

H.75 

11.85 

11.94 

12.03 

700 

11.38 

11.47 

11.56 

11.65 

11.74 

11.83 

11.92 

12.  02 

12.  II 

12.20 

690 

n-55 

11.63 

11.72 

11.82 

11.91 

12.00 

12.09 

12.19 

12.28 

12.38 

680 

11.72 

11.80 

11.89 

11.99 

12.08 

12.  18 

12.27 

12.37 

12.46 

12.56 

670 

11.89 

11.98 

12.07 

12.17 

12.26 

12.36 

12.46 

12-55 

12.65 

12-75 

660 

12.07 

12.  l6 

12.26 

12-35 

12.45 

12-55 

12.65 

12.74 

12.84 

12.94 

650 

12.26 

12.35 

12.45 

12.54 

12.64 

12.74 

12.84 

12.94 

13.04 

I3.I4 

640 

12.45 

12.55 

12.64 

12.74 

12.84 

12.94 

13.04 

13.14 

13.24 

13-35 

630 

12.65 

12.75 

12.84 

12.94 

13.04 

I3.I5 

13-25 

13.35 

13-45 

13.56 

620 

12.85 

12.96 

13.05 

I3.I5 

13-25 

13.36 

13.46 

13-57 

13.67 

13.78 

610 

13.06 

13-17 

13.27 

13-37 

13-47 

13.58 

13.68 

13.79 

13-89 

14.01 

600 

13.28 

13.39 

1349 

13-59 

13.70 

13.80 

13-91 

14.02 

14.13 

14.24 

59° 

13.51 

13.62 

13.72 

13.82 

13-93 

14.03 

14-15 

14.26 

14-37 

14.48 

580 

13-74 

13.85 

13.96 

14.06 

14.17 

14.28 

14.39 

14.51 

14.62 

14.73 

570 

13.98 

14.09 

14.20 

14-31 

14.42 

14.53 

14.64 

14.76 

14.88 

14.99 

560 

14.23 

14.34 

14.45 

14-57 

14.68 

14.79 

14.90 

15.02 

15.14 

15.25 

MEAN  TEMPERATURE   OF  THE  AIR  IN   CENTIGRADE  DEGREES. 

Barometric 

Pressure. 

18° 

20° 

22° 

24° 

26° 

28° 

30° 

32° 

34° 

36° 

mm. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

Metres. 

760 

11.32 

11.41 

11.49 

11.58 

11.66 

n-75 

11.84 

11.92 

12.01 

12.10 

750 

11.47 

11.56- 

11.64 

11-73 

11.82 

11.91 

12.00 

12.08 

12.17 

12.26 

740 

11.63 

11.72 

II.80 

11.89 

11.98 

12.07 

12.  l6 

12.24 

12-33 

12.42 

730 

11.79 

11.88 

11.96 

12.05 

12.15 

12.23 

12.32 

12.41 

12.50 

12.59 

720 

H-95 

12.04 

12.13 

12.22 

12.32 

12.40 

12.49 

12.58 

12.68 

12.77 

710 

12.12 

12.21 

12.30 

12.39 

12.49 

12.58 

12.67 

12.76 

12.86 

12.95 

700 

12.29 

12.39 

12.48 

12.57 

12.67 

12.76 

12.85 

12.94 

13.04 

13.13 

690 

12.47 

12-57 

12.66 

12.75 

12.85 

12.94 

13.04 

13.13 

13-23 

13.32 

680 

12.66 

12.75 

12.85 

12.94 

13.04 

I3-I3 

13.23 

I3.32 

13.42 

13.52 

670 

12.85 

12.94 

13.04 

I3.I4 

13-23 

13.33 

13.43 

13.52 

13.62 

13.72 

660 

13.04 

13.14 

13-24 

13.34 

13.43 

13.53 

I3.63 

13-73 

13.83 

13-93 

650 

13.24 

13-34 

13.44 

13.54 

13.64 

13-74 

13.84 

13.94 

14.04 

14.15 

640 

13.45 

13-55 

13-65 

'   13-75 

13-85 

13.96 

14.06 

14.15 

14.26 

14-37 

630 

13.66 

13.76 

13-87 

13.97 

14.07 

14.18 

14.28 

14.38 

14.49 

14.60 

620 

13.88 

13.98 

14.09 

14.20 

14.30 

14.41 

14.51 

14.62 

14.72 

14.83 

610 

14.11 

14.21 

14-32 

14-43 

14.54 

14.64 

14.75 

14.86 

14.96 

I5-07 

600 

14.35 

14-45 

14.56 

14.67 

14.78 

14.89 

15.00 

15.11 

15.21 

I5-32 

590 

14.59 

14.70 

14.81 

14.92 

15-03 

15.14 

15.25 

15.36 

15-47 

15-59  | 

580 

14.84 

14.95 

15-07 

I5.I7 

15-29 

15.40 

15.52 

15.63 

15.74 

15.86 

570 

15.10 

15.21 

15.33 

15-44 

15-56 

15.67 

15.79 

15.91 

16.02 

16.14 

560 

15.37 

15.48 

15-60 

15.72 

15.84 

15-95 

16.07 

16.19 

16.30 

16.42 

SMITHSONIAN  TABLES. 


117 


TABLE  32. 

DETERMINATION    OF    HEIGHTS    BY   THE    BAROMETER. 
Formula    of    Babinet. 

x^«       O 

C     7?      I       D 

L>  o-f-  £> 

C  (in  feet)  —52494      i-f--5^  — English  Measures. 

C  (in  metres)  =  16000      I  +  2  ^  °      M — Metric  Measures. 
L  looo    J 

In  which   Z  =  Difference  of  height  of  two  stations  in  feet  or  metres. 

BQ,  B  —  Barometric    readings    at    the    lower    and    upper    stations    respectively, 

corrected  for  all  sources  of  instrumental  error. 
tQ,  t  =  Air  temperatures  at  the  lower  and  upper  stations  respectively. 


Values    of   C. 


ENGLISH     MEASURES. 


METRIC    MEASURES. 


#(to+t)« 

log  C. 

C. 

F. 

Feet. 

10° 

4.69834 

49928 

15 

.70339 

505H 

20 

.70837 

51094 

25 

•71330 

51677 

30 

.71818 

52261 

35 

4.72300 

52844 

40 

.72777 

53428 

45 

•73248 

540II 

50 

.73715 

54595 

55 

•74177 

55178 

60 

4.74633 

55761 

65 

•75085 

56344 

70 

•75532 

56927 

75 

•75975 

57511 

So 

•76413 

58094 

85 

4.76847 

58677 

90 

.77276 

59260 

95 

.77702 

59844 

IOO 

.78123 

60427 

K(to  +  t). 

log  C. 

C. 

C. 

-10° 

4.18639 

Metres. 
I536o 

g 

.19000 

15488 

-6 

•19357 

15616 

-4 

.19712 

15744 

—  2 

.20063 

15872 

0 

4.20412 

16000 

+  2 

•20758 

16128 

4 

.21101 

16256 

6 

.21442 

16384 

8 

.21780 

16512 

10 

4.22II5 

16640 

12 

.22448 

16768 

14 

.22778 

16896 

16 

.23106 

17024 

18 

•23431 

17152 

20 

4-23754 

17280 

22 

.24075 

17408 

24 

•24393 

17536 

26 

.24709 

17664 

-   28 

.25022 

17792 

30 

4-25334 

17920 

32 

.25643 

18048 

34 

•25950 

18176 

36 

.26255 

18304 

SMITHSONIAN  TABLES. 


118 


TABLE  33. 

BAROMETRIC  PRESSURES  CORRESPONDING  TO  THE  TEMPERATURE 
OF  THE  BOILING  POINT  OF  WATER. 

(Brock. ) 
ENGLISH   MEASURES. 


Tempera- 
ture. 

o.°o 

O.°l 

0.°2 

0.°3 

0.°4 

0.°5 

0.°6 

0.°7 

0.°8 

0.°9 

F. 

Inches.     Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

185C 

17.06 

1709 

I7-I3 

17.17 

17.20 

I7-H 

17.28 

17.32 

17-35 

17-39 

iSS 

1743 

17-47 

17.51 

17-54 

17.58 

17.62 

1766 

17.70 

17-74 

17-77 

jS7 

I7.8l 

17-85 

17.89 

17-93 

17-97 

IS  01 

18  05 

18.08 

18.12 

18.  16 

iSS 

1  8.  20 

18.24 

18.28 

18-32 

18.36 

18  40 

18.44 

18.48 

18.52 

1856 

£     i  $9 

18.60 

18.64 

18.68 

18  72 

18.76 

18.80 

18.84 

18  88 

18.92 

18.96 

o  190 

19.00 

19.04 

19.08 

19  12 

19.  16 

19  21 

19.2; 

19.29 

19-33 

!9-37 

I     191 

19.41 

1945 

19.49 

19-54 

19-58 

19.62 

19.66 

19.70 

19  75 

19  79 

a    192 

1983 

19.87 

19.91 

19.96 

2O.  OJ 

20.04 

20.08 

20.  13 

20.17 

20   21 

V       193 

20.26 

20.30 

20.34 

20.38 

20.43 

20.47 

20  51 

20.56 

20  60 

20.64 

a  194 

20.69 

20.73 

20.78 

20.82 

20.86 

20.91 

20.95 

2I.OO 

2I.O4 

21.  08 

13  195 

21.13 

21.17 

21.22 

21.26 

21.31 

21-35 

21  40 

21.44 

21.49 

21-53 

'§    196 

21-58 

21.62 

21.67 

21.71 

21.76 

21.80 

21  85 

21.90 

21.94 

21.99 

Z    J97 

22.03 

22  08 

22.13 

22.17 

22  22 

22.27 

22.31 

22  36 

22.41 

22.45 

JJ    198 

22  50 

22-55 

22.59 

22.64 

22.69 

2273 

22.78 

22.83 

22.88 

22.92 

!  199 

22.97 

23.02 

23.07 

23.12 

23.16 

23-21 

23  26 

23-3I 

23-36 

23.40 

5  200 

23-45 

23-50 

23.55 

23.60 

23.65 

23.70 

23-75 

23-79 

2384 

23.89 

S      2OI 

23  94 

23-99 

2404 

24.09 

24  H 

24.19 

24.24 

24.29 

24  34 

24  39 

fl      2O2 

24.44 

24.49 

24-54 

24-59 

24.64 

24.69 

24  74 

24.79 

24-85 

24.90 

en      2O3 

24.95 

25.00 

25.05 

25.10 

25.15 

25.20 

25.26 

25.3I 

25-36 

25-4I 

*    204 

25.46 

25.52 

25-57 

25.62 

25.67 

25  72 

25  78 

25.83 

25-88 

25.94 

2  205 

25-99 

26.04 

26.09 

26.15 

26.20 

26.25 

26.31 

26.36 

26  41 

26.47 

bJo    206 

26.52 

26.58 

26.63 

26.68 

26.74 

26.79 

26.85 

26.90 

2696 

27.01 

'&    2°7 

27.06 

27.12 

27.17 

27.23 

27.28 

27-34 

27-39 

27.  4s 

27-51 

27.56 

*    2,8 

27.62 

27.67 

27-73 

27.78 

2784 

27.90 

27.95 

28.01 

28.07 

28.12 

PQ    209 

28.18 

28.24 

28.29 

28.35 

28.41 

28.46 

28.52 

28.58 

28.63 

28.69 

210 

28.75 

28.81 

28.87 

28.92 

28.98 

29.04 

29.10 

29  16 

29.21 

29.27 

211 

2933 

29-39 

29-45 

2951 

29-57 

29.63 

29.68 

29.74 

29.80 

2986 

212 

29.92 

29.98 

3004 

3O.IO 

30  16 

30.22 

30.28 

3°  34 

30.40 

30.46 

METRIC  MEASURES  (Brock}. 


TABLE  34. 


Temoera- 
ture. 

O.°0 

0  °1 

0.°2 

0.°3 

0.°4 

0  °5 

0.°6 

0.°7 

0.°8 

0.°9 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

K-     80° 

3549 

356.3 

357-8 

359-2 

360.7 

362.1 

363.6 

365.I 

366.5 

368.0 

I      8l 

3695 

371.0 

372.5. 

374o 

375-5 

377-o 

378.5 

380.0 

381.6 

383.1 

a    82 

384.6 

386.2 

387.7 

389-3 

39o8 

392-4 

394-0 

395  5 

397-1 

398.7 

§   83 

4^0.3 

401  9 

403-5 

405  i 

4o6  7 

408.3 

409.9 

411.6 

4i3-2 

414.8 

S    84 

416.5 

418.1 

419.8 

421.4 

423-I 

424.8 

426.4 

428.1 

4298 

431-5 

%     85 

433-2 

434-9 

436  6 

4383 

440.0 

441.8 

443-5 

445  2 

447-0 

448.7 

~      86 

4  so.  5 

452.2 

4540 

4558 

457  5 

459-3 

461.1 

462.9 

464.7 

466.5 

•S      87 

468.3 

470.1 

472  o 

473-8 

475-6 

477-5 

479-3 

481.2 

483.0 

484.9 

g      88 

486.8 

488.6 

490-5 

492.4 

494-3 

496.2 

498.1 

500.0 

501-9 

503  9 

g      89 

505.8 

507.7 

509  7 

511.6 

513-6 

515-6 

517-5 

5I9-5 

521.5 

523-5 

a     90 

525-5 

527  5 

529-5 

531-5 

533-5 

535-5 

537-6 

539-6 

541  6 

543  7 

13      91 

545.8 

547-8 

5499 

552.o 

554-1 

556.2 

558-3 

5604 

562.5 

564-6 

S      92 

566.7 

5688 

57i  o 

573.1 

575  3 

577-4 

579-6 

581.8 

584.0 

586.1 

o      93 

588.3 

59°-5 

592-7 

595  o 

597-2 

599-4 

601.6 

603.9 

606  i 

61.8.4 

rH                       ^ 

S      94 

610.6 

612.9 

615.2 

6I7-5 

619.8 

622.1 

624.4 

626.7 

629  o 

631  3 

~     95 

633-7 

636  o 

638.4 

640.7 

643.1 

645  4 

647.8 

650.2 

6526 

655  o 

5    96 

657-4 

659.8 

662.2 

664.7 

667.1 

669.5 

672.0 

674-5 

6769 

679.4 

c      97 

681.9 

684.4 

686.9 

689.4 

691.9 

691.4 

6969 

699-5 

702  o 

704.6 

bjQ         o 
<u       98 

707.1 

709  7 

712.3 

714.9 

7174 

720.0 

722.7 

7253 

727.9 

7305 

«      99 

733  2 

735-8 

738.5 

741.1 

7438 

7465 

749-2 

75L9 

754-6 

757-3 

£100 

760.0 

76^.7 

765.5 

768.2 

771  o 

773-7 

7765 

7793 

782  i 

784.9 

SMITHSONIAN  TABLES. 


119 


HYGROMETRICAL  TABLES. 


Pressure  of  aqueous  vapor  {BrocK)  — 

English  measures TABLE  35 


Metric  measures 


(36 

(43 


Pressure  of  aqueous  vapor  at  low  temperatures  (C.  F.  Marvin)— 

English*"  and  Metric  measures      ........  TABLE  37 

Weight  of  a  cubic  foot  of  saturated  vapor  —  English  measures    .  TABLE  38 

Weight  of  a  cubic  metre  of  saturated  vapor  —  Metric  measures  .  TABLE  39 

Reduction  of  psychrometric  observations  —  English  measures. 

Pressure  of  aqueous  vapor  ...........  TABLE  40 

Values  of  0.000367  B  (/  —  /,)  (i  +  j^)       .....  41 


Relative  humidity  —  Temperature  Fahrenheit   .     .....     TABLE  42 

Reduction  of  psychrometric  observations  —  Metric  measures. 

Pressure  of  aqueous  vapor  ...........     TABLE  43 

Values  of  0.000660  B  (t  —  t,)  (  i  +  ^—  ^)  44 

\          873  / 

Relative  humidity  —  Temperature  Centigrade    .     .     .     .     .     .     TABLE  45 

Reduction  of  snowfall  measurements. 

Depth    of   water    corresponding   to   the   weight   of   snow 

(or  rain)  collected  in  an  8-inch  gage   ......     TABLE  46 

Rate  of  decrease  of  vapor  pressure  with  altitude      ....     TABLE  47 


121 


TABLE   35. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Broch.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 
0?l 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

on 

Temper- 
ature. 

Vapo' 
Pressure. 

Diff. 
for 
0?l 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 
0?l 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

-20?0 

0.0167 

-I0?0 

0.0277 

0?0 

0.0449 

I0?0 

0.0710 

-19.8 

0.0168 

i 
i 

-9.8 

0.0280 

i 

+  0.2 

0.4 

•0454 
.0458 

2 

10.2 
10.4 

.0716 
.0723 

3 

3 

19.6 

.0170 

i 

9.6 

.0283 

0.6 

.0462 

2 

10.6 

.0729 

3 

19.4 

.0172 

i 

94 

.0286 

08 

.0467 

2 

10.8 

.0736    1 

3 

19.2 

.0174 

9.2 

.0289 

2 

3 

19.0 

.0176 

i 

9.0 

.0292 

.0 

0.0471 

2 

11.0 

0.0742 

•5 

i 

.2 

•0475 

II.  2 

.0749 

O 

-18.8 

0.0177 

j 

-8.8 

0.0294 

•4 

.  0480 

2 

II.4 

.0756 

3 

18.6 

.0179 

i  6 

.0297 

.6 

.0484 

2 

ii.  6 

.0762 

3 

18.4 

.Ol8l 

i 
j 

M 

.0300 

2 

1.8 

.0489 

2 

n.  8 

.0769 

3 

18.2 

.0183 

8.2 

.0303 

2 

3 

iS.o 

.0185 

i 

8.0 

.0306 

2 

2.0 

0.0493 

12.0 

0.0776 

-17.8 

0.0187 

i 
i 

-7.8 

o.  0309 

2 
2 

2.2 
2.4 

.0498 
•0503 

2 

2 

12.2 
12.4 

.0783 
.0790 

3 
3 

17.6 

.0189 

i 

7-6 

.0312 

2 

2.6 

.0507 

2 

12.6 

.0797 

3 

17.4 

.0191 

i 

7-4 

.0315 

2 

2.8 

.0512 

2 

12.8 

.0804 

4 

17.2 

.0193 

7.2 

.0318 

2 

4 

17.0 

•0195 

i 

7-0 

.0322 

3.0 

0.0517 

13.0 

O.oSl  I 

i 

2 

3'2 

.0522 

13.2 

.0818 

-16.8 

0.0197 

i 

-6.8 

0.0325 

2 

3-4 

.0526 

2 

13-4 

.0825 

4 

16.6 

.0199 

6.6 

.0328 

2 

3-6 

•0531 

2 

13.6 

.0832 

4 

16.4 

.0201 

i 

6.4 

•0331 

2 

3-8 

•0536 

2 

13.8 

.0840 

4 

16.2 

.0203 

6.2 

•0334 

2 

4 

16.0 

.0205 

i 

6.0 

.0338 

2 

4.0 

0.0541 

14.0 

0.0847 

i 

2 

4.2 

.0546 

3 

14.2 

.0854 

. 

-15.8 

O.02O7 

i 

-5.8 

0.0341 

2 

4-4 

•0551 

3 

14.4 

.0862 

4 

15-6 

.O2O9 

i 

5-6 

•0344 

2 

4.6 

.0556 

3 

14.6 

.0869 

4 

15-4 

.G2I  I 

i 

5-4 

•0347 

2 

4.8 

.0561 

3 

14.8 

.0877 

4 

15.2 

.0213 

I1 

5-2 

.0351 

3 

4 

15.0 

.O2l6 

. 

5-o 

•0354 

5.0 

0.0567 

15.0 

0.0885 

-14.8 

0.0218 

i 
i 

-4.8 

0.0358 

2 
2 

5-2 

5-4 

.0572 
•0577 

3 

15-2 
15-4 

.0892 
.0900 

4 

14.6 

.0220 

i 

4.6 

.0361 

2 

5-6 

.0582 

3 

15-6 

.0908 

14.4 

.0222 

i 

4.4 

•0365 

2 

5-8 

.0588 

3 

15-8 

.0916 

14.2 

.0225 

4.2 

.0368 

3 

4 

14.0 

.0227 

i 

4.0 

.0372 

6.0 

0.0593 

16.0 

0.0924 

i 

2 

6.2 

.0598 

3 

16.2 

.0932 

-13.8 

0.0229 

i 

-3.8 

0.0375 

2 

6.4 

.0604 

3 

16.4 

.0940 

4 

13.6 

.0232 

i 

3-6 

.0379 

2 

6.6 

.0609 

3 

16.6 

.0948 

4 

13-4 

.0234 

i 

3-4 

•0383 

2 

6.8 

.0615 

3 

16.8 

.0956 

4 

13.2 

.0236 

3-2 

.0386 

3 

4 

13.0 

.0239 

i 

3-o 

.0390 

2 

7.0 

0.0620 

17.0 

0.0965 

-12.8 

12.6 

12.4 

12.2 

0.0241 
.0244 
.0246 
.0249 

i 
i 
i 
i 
i 

-2.8 

2.6 

2.4 

2.2 

0.0394 

•0397 
.0401 
.0405 

2 
2 
2 
2 
2 

7-2 

7-4 
7-6 
7-8 

.0626 
.0632 
-0637 
.0643 

3 
3 
3 
3 

17.2 
17.4 
17.6 
17.8 

•0973 
.0981 
.0990 
.0999 

4 
4 
4 

4 

12.0 

.0251 

2.0 

.0409 

8.0 

0.0649 

18.0 

0.1007 

-11.8 

n.6 
11.4 

II.  2 

0.0254 
.0256 
.0259 
.O26l 

i 
i 
i 

-1.8 

1.6 
1.4 

1.2 

0.0413 
.0417 
.0421 
.0425 

2 
2 
2 
2 

8.2 

8-4 
8.6 
8.8 

•0655 
.0661 
.0667 
.0673 

3 
3 
3 
3 

18.2 
18.4 
18.6 
18.8 

.I0l6 
.1024 
•1033 
.1042 

4 
4 
4 

II.  O 

.0264 

i 

1.0 

.0429 

2 

9.0 

0.0679 

3 

19.0 

O.I05I 

-10.8 

0.0267 

-0.8 

0.0433 

9.2 

.0685 

3 

19.2 

.1060 

10.6 

10.4 

.0269 
.0272 

I 

i 

0.6 
0.4 

.0437 
.0441 

2 
2 

9-4 
9.6 

.0691 
.0697 

3 
3 

19.4 
19.6 

.1069 
.1078 

5 

10.2 

.0275 
1 

I 

0.2 

•0445 

2 

9.8 

.0704 

3 

19.8 

.1087 

5 

SMITHSONIAN  TABLES 


122 


TABLE    35, 


PRESSURE    OF    AQUEOUS    VAPOR. 

(Brock.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
tor 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

F. 

Inch. 

20?0 

0.1097 

30?0 

0.  1660 

40?0 

0.2465 

50?0 

0.3598 

I  's 

20.  2 

.1106 

5 

30.2 

.1673 

40.2 

.2484 

T  C\ 

50.2 

.3625 

2O.4 

.1115 

304 

.1687 

40.4 

.2503 

1  \J 

504 

.3652 

2O.6 

.1125 

5 

30.6 

.1700 

40.6 

•2523 

IO 

50.6 

•3679 

20.8 

•1134 

5 

30.8 

.1714 

40.8 

.2542 

IO 

50.8 

.3706 

J4 

5 

7 

IO 

14 

21.0 

0.1144 

31.0 

0.1728 

41.0 

0.2562 

51.0 

0-3734 

21.2 

•II54 

5 

31.2 

.1742 

7 

41.2 

•2582 

IO 

51-2 

.3761 

21.4 

.1163 

5 

314 

.1756 

7 

41.4 

.2601 

IO 

514 

.3789 

4 

21.6 

•1173 

5 

31.6 

.1770 

7 

41.6 

.2621 

51-6 

.3817 

4 

21.8 

.1183 

5 

31.8 

.1784 

7 

41.8 

.2642 

IO 

51-8 

.3845 

J4 

5 

7 

10 

14- 

22.0 

0.1193 

32.0 

0.1799 

/ 

42.0 

0.2662 

T  C\ 

52.0 

0.3874 

22.2 

.1203 

5 

32.2 

.1813 

7 

42.2 

.2683 

IvJ 

52.2 

.3902 

4 

22.4 

.1213 

5 

324 

.1828 

7 

424 

.2703 

524 

.3931 

4 

22.6 

.1223 

5 

32.6 

.1842 

7 

42.6 

.2724 

IO 

52.6 

.3960 

J4 

22.8 

•1234 

5 

32-8 

••1857 

7 

42.8 

•2745 

I  I 

52.8 

.3989 

I5 

5 

7 

II 

15 

23.0 

0.1244 

33.0 

0.1872 

43.0 

0.2766 

53.0 

0.4018 

23.2 

•1255 

5 

33-2 

.1887 

43-2 

.2787 

1  1 

53-2 

.4048 

T>2 

234 

.1265 

5 

334 

.1902 

434 

.2808 

I  I 

534 

.4077 

15 

23-6 

.12/6 

5 

33-6 

.1917 

43-6 

.2830 

I  I 

53-6 

.4107 

J5 

23-8 

.1287 

5 

33-8 

•1933 

43-8 

.2851 

I  I 

53-8 

.4137 

J5 

5 

8 

II 

15 

24.0 

0.1297 

34.0 

0.1948 

44.0 

0.2873 

54.0 

0.4168 

24.2 

.1308 

5 

34-2 

.1964 

8 

44.2 

.2895 

I  I 

II 

54-2 

.4198 

j|j 

24.4 

.1319 

344 

.1979 

q 

444 

.2917 

T  T 

544 

.4229 

~ 

24.6 

.1330 

5 

34-6 

•1995 

o 

44-6 

•2939 

1  JL 

T    T 

54-6 

4259 

15 

24.8 

.1341 

34-8 

.2011 

44-8 

.2962 

1  X 

54-8 

.4290 

1 

6 

8 

II 

16 

25.0 

0.1352 

35.0 

0.2027 

q 

45.0 

0.2984 

T   T 

55.0 

04322          6 

25-2 

.1364 

5 

35-2 

.2043 

o 

8 

45.2 

.3007 

1    1 
J   £ 

55-2 

•4353       TA 

254 

.1375 

354 

•2059 

454 

.3030 

554 

•4385 

, 

25.6 

.1386 

£ 

35-6 

.2O76 

45-6 

.3053 

12 

55-6 

.4417 

A 

25.8 

.1398 

o 

35-8 

.2092 

45-8 

.3076 

1  2 

55-8 

4449 

10 

6 

8 

12 

16 

26.0 

0.1409 

36.0 

0.2109 

46.0 

0.3099 

56.0 

0.4481 

26.2 

.1421 

36.2 

.2125 

46.2 

.3123 

1  2 

56.2 

.4513 

A 

26.4 

.1433 

£ 

364 

.2142 

46.4 

.3146 

1  2 

564 

4546 

rfr 

26.6 

.1445 

o 

36.6 

.2159 

46.6 

.3170 

1  2 

56.6 

4579 

10 

26.8 

.1457 

36.8 

.2176 

9 

46.8 

.3194 

1  2 

56.8 

.4612 

*7 

6 

9 

12 

17 

27.0 

o.  1469 

37.0 

0.2193 

47.0 

0.3218 

57.0 

0.4645 

T  *7 

27.2 

.1481 

j) 

37-2 

.2210 

9 

47-2 

.3242 

1  2 

T  O 

57-2 

.4679 

*7    ' 

274 

•  1493 

f. 

374 

.2228 

9 

474 

•3267 

J  Z 
T  O 

574 

.4712 

T7 

27.6 

.1505 

o 

37-6 

.2245 

9 

47.6 

.3291 

i  £ 

57-6 

.4746 

• 

27.8 

.1518 

37-8 

.2263 

9 

47-8 

.3316 

12 

57-8 

.4780 

17 

6 

9 

12 

i  j 

28.0 

0.1530 

38.0 

0.2281 

48.0 

0.3341 

58.0 

0.4815 

28.2 

.1543 

38.2 

.2298 

9 

48.2 

.3366 

J3 

58.2 

.4849 

17 

28.4 

.1555 

384 

.2316 

9 

48.4 

•3391 

J3 

584 

.4884 

J7   i 

28.6 

.1568 

38.6 

.2334 

9 

48.6 

.3416 

:3 

58.6 

.4919 

TQ 

28.8 

.1581 

38.8 

•2353 

9 

48.8 

•3442 

J3 

58.8 

4954 

i 

6 

9 

I  7 

18 

29.0 

0.1594 

71 

39.0 

0.2371 

49.0 

0.3467 

59.0 

0.4990 

TQ     I 

29.2 

.1607 

7" 

39-2 

.2390 

9 

49-2 

•3493 

3 

59-2 

.5025 

TQ 

294 

.1620 

394 

.2408 

494 

.3519 

3 

594 

.5061 

1 

TQ      ( 

29.6 

•  1633 

39-6 

.2427 

9 

49.6 

.3546 

J3 

59-6 

.5097 

lo 

TQ 

29.8 

.1646 

7 

39-8 

.2446 

9 

10 

49.8 

•3572 

T3 

59.8 

.5134 

J  O 

18 

SMITHSONIAN  TABLES. 


123 


TABLE  35. 


PRESSURE    OF    AQUEOUS    VAPOR. 

(Brock.} 
ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inch. 

F. 

Inch. 

F. 

Inches. 

F. 

Inches. 

60?0 

60.2 

0.5170 
.5207 

18 

70?0 

70.2 

0.7320 
•7370 

25 

80?0 

80.2 

I.02I9 
.0286 

34 

90?0 

90.2 

1.4081 
.4170 

44 

60.4 

.5244 

19 

70.4 

.7420 

25 

80.4 

.0354 

34 

90.4 

•4259 

45 

60.6 

.5282 

19 

70.6 

-7471 

25 
~f. 

80.6 

.0422 

34 

90.6 

•4349 

45 

60.8 

•5319 

T9 

70.8 

•7522 

20 

80.8 

.0490 

34 

90.8 

•4439 

45 

19 

26 

34 

45 

61.0 

61.2 
61.4 
61.6 
61.8 

0-5357 

•5395 
•5433 
•  5471 
•5510 

19 
19 
19 
•  19 

71.0 

71.2 
71.4 
71.6 
71.8 

0.7573 
.7625 
.7676 
.7728 
.7781 

26 
26 
26 
26 

81.0 

81.2 
81.4 
81.6 
81.8 

1.0558 
.0627 
.0697 
.0767 
•0837 

35 
35 
35 
35 

91.0 

91.2 

91.4 
91.6 
91.8 

1-4530 
.4621 
.4712 
•4805 
4897 

46 
46 
46 
46 

62.0 

62.2 
62.4 
62.6 
62.8 

0.5549 
.5588 
.5628 
-5667 
.5707 

20 
20 
20 
20 

72.0 

72.2 

724 
72.6 

72.8 

0.7834 
.7887 
•7940 

•7994 
.8048 

26 

27 
27 
27 
27 

82.0 

82.2 
82.4 
82.6 
82.8 

1.0907 

.0978 
.1050 
.1121 
.1194 

35 
36 
36 
36 
36 

92.0 

92.2 
92.4 
92.6 
92.8 

1.4990 
.5084 
•5178 
.5273 
.5368 

47 

47 
47 
47 
48 

20 

27 

36 

48 

63.0 

0.5748 

73.0 

0.8102 

83.0 

I.I266 

93.0 

1.5464 

.  o 

63.2 
634 

.5788 
•5829 

2O 
20 

O  T 

73-2 
734 

•8157 
.8212 

27 
28 
oR 

83-2 
834 

•1339 
•1413 

37 
37 

93-2 
934 

s- 

•5560 
•5657 

48 

48 

63-6 

.5870 

-.  X 

O  T 

73-6 

.8267 

2o 

oR 

83.6 

.1487 

37 

93-6 

•5755 

49 

63.8 

•5911 

2.  1 

73-8 

•8323 

2o 

83.8 

.I56l 

37 

93-8 

.5853 

49 

21 

28 

37 

49 

64.0 

64.2 
64.4 
64.6 
64.8 

0.5952 
•5994 
.6036 
.6078 
.6120 

21 
21 
21 
21 

74.0 

74-2 
744 
74-6 
74-8 

0.8379 

•8435 
.8492 

.8549 
.8606 

28 
28 
29 
29 

84.0 

84.2 

844 
84.6 
84.8 

1-1635 
.1710 
.1786 
.1862 
.1938 

38 
38 
38 
38 

94.0 

94-2 
944 
94-6 
94-8 

I-595I 
.6050 
.6149 
.6249 
•6350 

49 
50 
50 
50 

21 

29 

38 

51 

65.0 

0.6163 

75.0 

0.8664 

85.0 

I.20I5 

95.0 

1.6451 

65.2 

.6206 

22 
22 

75-2 

.8722 

29 

85-2 

•2093 

39 

1C\ 

95-2 

-6552 

51 

654 

.6249 

754 

.8780 

29 

854 

.2170 

39 

954 

.6655 

5 

65.6 
65.8 

.6293 
•6337 

22 
22 

75-6 

75-8 

•8839 
.8898 

29 
30 

85.6 
85.8 

.2248 
.2327 

39 
39 

95-6 
95-8 

.6758 
.6861 

51 
52 

66.0 

0.6381 

22 

76.0 

0.8957 

30 

86.0 

1.2406 

39 

96.0 

1.6964 

52 

66.2 
66.4 
66.6 
66.8 

•6425 
.6470 
.6514 
.6560 

22 
22 
22 
23 

76.2 

764 
76.6 
76.8 

.9017 
.9077 

•9J37 
.9198 

3° 
30 
30 
30 

86.2 
86.4 
86.6 
86.8 

.2485 
•2565 
.2645 
.2726 

4° 
40 
40 
40 

96.2 
96.4 
96.6 
96.8 

.7069 
.7174 
.7279 

.7385 

52 
52 
53 
53 

23' 

31 

41 

53 

67.0 

0.6605 

77.0 

0.9259 

87.0 

1.2807 

97.0 

1.7492 

r  A 

67.2 

.6651 

23 

O^ 

77-2 

.9321 

31 

87.2 

.2889 

41 

97-2 

•7599 

54 

67.4 

.6697 

23 

2^» 

774 

•9383 

31 

874 

.2971 

41 

974 

.7707 

C  A 

67.6 
67.8 

.6743 
.6789 

0 

23 

77.6 

77-8 

•9445 
.9507 

3i 

87.6 
87.8 

•3054 
.3137 

42 

97-6 
97.8 

.7815 
.7924 

54 

54 

23 

31 

42 

55 

68.0 

0.6836 

78.0 

0.9570 

88.0 

1.3220 

98.0 

1.8034 

C  K 

68.2 
68.4 
68.6 
68.8 

.6883 
.6930 
.6978 
.7026 

24 
24 

24 
24 

78.2 
78.4 
78.6 
78.8 

•9633 
.9697 
.976i 
.9825 

32 
32 
32 
32 

88.2 
88.4 
88.6 
88.8 

.3304 
•3388 

•3473 
.3558 

42 
42 
43 

98.2 

984 
98.6 
98.8 

.8144 
.8254 
.8366 

.8477 

55 

55 
56 
56 

69.0 

69.2 
69.4 
69.6 
69.8 

0.7074 
.7123 
.7172 
.7221 

.7270 

24 
24 
24 
25 
25 
25 

79.0 

79.2 

794 
79.6 
79-8 

0.9890 
•9955 

1.  002  1 
.0087 
•0153 

32 

33 
33 
33 
33 
33 

89.0 

89.2 

894 
89.6 
89.8 

1.3644 

•3731 
.3818 

.3905 
•3993 

43 

43 
43 
44 
44 
44 

99.0 

99.2 

994 
99.6 

99-8 

1.8590 
.8703 
.8817 
.8931 
.9046 

56 

57 
57 
57 
57 
58 

SMITHSONIAN  TABLES 


124 


TABLE   35. 


PRESSURE    OF   AQUEOUS    VAPOR 

(Brock.} 
ENGLISH    MEASURES. 


n  iff 

Diff 

Diff. 

Diff 

1  Temper- 

Vapor 

UITT. 

for 

Temper- 

Vapor 

UITT. 

for 

Temper- 

Vapor 

for 

Temper- 

Vapor 

LI  in. 

ature. 

Pressure. 

TOP 

ature. 

Pressure. 

Tur 

o:\ 

ature. 

Pressure. 

TOT 

ature. 

Pressure. 

0°?l 

F. 

Inches.- 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

I00?0 

1.9161 

g 

IIO?0 

2.5765 

I20?0 

3-4253 

96 

I30?0 

4.5044 

121 

IOO.2 

100.4 

.9277 
•9394 

58 

I  10.2 
II0.4 

.5915 
.6066 

75 
ff. 

1  20.  2 
I2O.4 

4445 
.4637 

96 

130.2 
130.4 

.5286 
•5530 

122 

100.6 

•9511 

59 

1  10.6 

.6217 

T« 

I2O.6 

.4831 

97 

130.6 

•5775 

1  22 

100.8 

.9629 

59 

1  10.8 

.6369 

76 

120.8 

.5026 

97 

130.8 

.6020 

123 

101.  0 

1-9747 

59 

IM.O 

2.6522 

77 

121.0 

3-5221 

98 

0Q 

131.0 

4.6267 

123 

IOI.  2 

101.4 
101.6 
loi.S 

.9867 
.9986 
2.0107 
.0228 

60 
60 
60 

III.  2 
III-4 

111,6 

iii.S 

.6676 
.6831 
.6986 
.7142 

77 
77 
78 
78 

121.2 
I2I.4 
I2I.6 
I2I.8 

•5417 
.5615 
.5813 
.6012 

90 
99 
99 

100 

131.2 

I3M 
131.6 
131.8 

•6515 
.6764 

-70I5 
.7266 

124 
125 
125 
126 

61 

78 

100 

126 

102.0 

2.0349 

61 

112.0 

2.7299 

122.0 

3.6213 

IOI 

132.0 

4.7519 

102.2 

.0471 

112.  2 

-7457 

79 

122.2 

.6414 

132.2 

-7773 

• 

IO2.4 
IO2.6 
102.8 

•0594 
.0718 
.0842 

62 
62 

II2.4 
II2.6 
II2.8 

.7616 

•7775 
•7935 

79 
80 
80 

122.4 
122.6 
122.8 

.6616 
.6819 
.7023 

IOI 

1  02 
1  02 

1324 
132.6 
132.8 

.8028 
.8284 
.8541 

127 
128 
129 

62 

80 

IO2 

129 

103.0 

103.2 

2.0967 
.1092 

63 

113.0 

113.2 

2.8096 
•8257 

81 

QT 

123.0 

123.2 

•7434 

103 

133.0 

133-2 

4.8800 
-9°59 

130 

103.4 
103.6 
103.8 

.1218 

•  1345 
-1473 

63 
64 

113.6 
113.8 

.8420 
.8583 
.8747 

ol 

82 
82 

123.4 
123.6 
123.8 

.7641 
.7849 
.8058 

103 
104 

104 

J334 
133-6 
133.8 

-9320 
.9582 
.9845 

130 
131 
132 

64 

82 

105 

132 

104.0 

2.1601 

114.0 

2.8912 

124.0 

3.8267 

T/-\£ 

134.0 

5.0110 

104.2 
104.4 
104.6 
104.8 

.1730 

.1859 
.1989 
.2120 

65 
65 
65 

114.2 
114.4 
114.6 
114.8 

.9078 
.9244 
.9412 
.958o 

83 
84 
84 

124.2 
124.4 
124.6 
124.8 

.8478 
.8690 
.8903 
.9117 

IO5 
106 
106 
107 

134.2 

1344 
134.6 
134.8 

.0375 
.0642 
.0910 
.1179 

J33 
133 
134 
135 

66 

85 

107 

135 

105.0 

105.2 
105.4 
105.6 
105.8 

2.2251 

.2384. 
.2516 
.2650 
.2784 

66 
66 
67 
67 

115.0 

115.2 

ii54 
115.6 
115-8 

2.9749 
.9919 
3.0089 
.0261 
.0433 

85 
85 

86 
86 

125.0 

125.2 
125.4 
125.6 
125.8 

3-9332 
•9548 
•9765 
.9983 
4.0202 

108 
109 
109 
no 

135.0 

135-2 
1354 
135.6 
135.8 

5.1450 
.1722 
.1994 
.2269 
.2544 

136 
136 
137 
138 

67 

87 

no 

i  "^8 

106.0 

|  106.2 
106.4 

2.2919 

-3054 
.3190 

68 
68 

{.Q 

116.0 

116.2 
116.4 

3.0606 
.0780 
•0955 

87 
87 

00 

126.0 

126.2 
126.4 

4.0422 
.0643 
.0865 

in 
in 

136.0 

136.2 
136.4 

5.2820 
.3098 

•  3377 

139 
139 

106.6 
;  106.8 

.3327 
•3465 

Oo 

69 

116.6 
116.8 

.1131 
.1308 

oO 

88 

126.6 
126.8 

.1088 
.1312 

112 
112 

136.6 
136.8 

.3657 
•3939 

140 
141 

69 

89 

IT3 

141 

107.0 

2.3603 

117.0 

3.H85 

127.0 

4-1537 

137.0 

5.4221 

107.2 

•3742 

7° 

117.2 

.1663 

09 

127.2 

.1764 

TI3 

137.2 

45°5 

142 

107.4 

•  3882 

7° 

117.4 

.     .1842 

9° 

127.4 

.1991 

114 

T  T  A 

1374 

.4791 

T  A  *) 

1  107.6 

.4023 

70 

117.6 

.2023 

9° 

127.6 

.2219 

114 

137.6 

.5077 

T43 

T  A  A 

1  107.8 

.4164 

71 

117.8 

.2204 

91 

127.8 

.2448 

11  5 

137-8 

•5365 

144 

71 

91 

1  1  c 

H5 

(08.0 

2.4306 

118.0 

3-2386 

r\T 

128.0 

4-2679 

, 

138.0 

5.5654 

;     1  08.2 
i     108.4 

:  ios.6 

•4449 
4592 

4736 

72 
72 

TO 

IlS.2 
Il8.4 
II8.6 

-2568 
.2752 
•  2937 

91 
92 
92 

128.2 
128.4 
128.6 

.2910 
•3H3 
•3377 

116 
117 

138.2 
138.4 
138.6 

'•5945 
.6237 
.6530 

146 
H7 

•  i  os.s 

.4881 

/2 

II8.8 

.3122 

93 

128.8 

.3612 

1  17 

138.8 

.6824 

147 

73 

93 

118 

148 

109.0 

2.5026 

119.0 

3.3308 

129.0 

4.3848 

139.0 

5-7120 

109.2 
109.4 
i  109.6 
109.8 

•  5172 
•5319 
.5467 
.5616 

73 
73 
74 
•74 
75 

119.2 
119.4 
119.6 
119.8 

•3495 
•3683 
.3872 
.4062 

94 
94 
95 
95 
95 

129.2 
129.4 
129.6 
129.8 

-4085 

•4323 
.4562 
.4802 

119 
119 
1  20 
1  20 

121 

139.2 

139.6 
139-8 

•7417 
.7715 
.8014 

.8315 

149 
149 
150 
150 

SMITHSONIAN  TABLES. 


125 


TABLE  35. 


PRESSURE    OF   AQUEOUS    VAPOR, 

(Broch.} 
ENGLISH    MEASURES. 


Temper 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 

for 

F. 
I40?0 

140.2 
140.4 

Inches. 

5.8617 
.8921 
.9226 

152 
152 

F. 
I50?0 

150.2 
150.4 

Inches. 
7.5521 
.5897 
.6275 

188 
189 

F. 
I60?0 

160.2 
160.4 

Inches. 

^6836 
.7300 

231 
232 

F. 
I70?0 

170.2 
170.4 

Inches.   ! 
12.1870        s 

OA10          2°l 

^997  i  1* 

140.6 

.9532 

J53 

150.6 

•6654 

190 

160.6 

.7765 

233 

170.6 

.3564   i     2o^ 

140.8 

.9839 

T54 

150.8 

•7035 

191 

160.8 

-8233 

234 

170.8 

.4133     j           5 

I54 

191 

235 

286 

141.0 

141.2 
141.4 
141.6 

6.0148 
•  0458 
.0770 
.1083 

155 
156 
157 

151.0 

151.2 

1514 
151.6 

7.7418 
.7802 
.8188 
•8575 

192 

.193 
194 

161.0 

161.2 
161.4 
161.6 

9.8702 

-9647 
IO.OI22 

236 

237 
238 

171.0 

171.2 
171.4 
171.6 

12.4704 

.5278 

.5853 
.6431 

287 
288 
289  - 

141.8 

•1397 

I57 

151.8 

.8964 

J95 

161:8 

.0599 

239 

171.8 

./on 

290 

142.0 

142.2 

6.1713 
.2030 

159 

152.0 

152.2 

7-9355 

•9747 

195 
196 

162.0 

162.2 

10.1078 
•1559 

240 
241 

172.0 

172.2 

12.7593 

.8177 

291 

292  ' 

142.4 
142.6 
142.8 

.2348 
.2668 
.2989 

?6o 
161 

1524 
152.6 
152.8 

8.0141 
•0536 
•0934 

197 
198 
199 

162.4 
162.6 
162.8 

.2042 
.2526 
.3013 

241 
242 
243 

172.4 
172.6 
172.8 

.8764 
.9353 
.9945 

293 

295  ; 
296 

161 

199 

244 

297 

143.0 

6.3312 

- 

153.0 

8.1332 

163.0 

10.3501 

O  A  C 

173.0 

13.0538 

143.2 

.3636 

fi~ 

153-2 

•1733 

OPiT 

163.2 

•3992 

245 

•7/lfi 

173.2 

•1134 

296 

1434 
143.6 
143-8 

•3961 
.4288 
.4616 

164 

164 

1534 
153-6 
153-8 

•  2135 
•2539 
.2944 

*£\Jl. 

202 
203 

163.4 
163.6 
163.8 

4484 

4979 
•5475 

24O 

247 
248 

1734 
173.6 

173-8 

.1732 
•2332 
•2935 

299 
300 
301 

165 

204 

249 

3°3 

144.0 

6.4946 

154.0 

8-3351 

s>r\C 

164.0 

10.5974 

174.0 

13-3540 

144.2 

.5277 

rfifi 

154.2 

.3760 

205 

OO£ 

164.2 

.6474 

25O 

174.2 

.4147 

3°4 

144.4 
144.6 
144.8 

.5610 

•5944 
.6279 

100 
167 
1  68 

154-4 
154.6 
154-8 

.4171 
4583 
•4997 

205 

206 
207 

164.4 
164.6 
164.8 

.6976 
.7480 
.7986 

25  I 
252 

253 

174.4 
174.6 
174-8 

.4756 

.5368 
.5982 

3°5 
306 
307 

1  68 

208 

254 

308 

145.0 

145.2 

1454 
145.6 

6.6616 

.6954 
.7294 

.7635 

169 
170 
171 

155.0 

155-2 
1554 
155-6 

8.5413 
•5830 
.6249 
.6670 

209 

2IO 
2IO 

OT  T 

165.0 

165.2 
165.4 
165.6 

10.8495 
.9005 

.9517 
11.0032 

255 
256 

257 
<,cO 

175.0 

175-2 
1754 
175.6 

13.6599 
.7218 

.7839 
.8462 

309 
3ii 
312 

145-8 

.7978 

171 

155-8 

.7092 

ZiX 

165.8 

.0548 

25° 

175.8 

.9088 

3J3 

172 

212 

259 

3T4 

146.0 

146.2 

6.8322 
.8668 

173 

156.0 

156.2 

8.7516 
.7942 

213 

166.0 

166.2 

11.1067 
•1587 

260 

O£T 

176.0 

176.2 

13.9716 
14.0347 

315 

146.4 

.9015 

I74 

156.4 

.8370 

214 

or- 

166.4 

.21.09 

2O1 
ofio 

176.4 

.0980 

3T7 

146.6 
146.8 

•9363 
•9713 

!74 
175 

156.6 
156.8 

.8799 
.9231 

2I5 
216 

166.6 
166.8 

.2634 
.3160 

2Q2 

263 

176.6 
176.8 

.1616 
.2253 

319 

176 

217 

264 

320 

147.0 

147.2 
147.4 
147.6 
147.8 

7.0065 
.0418 

•0773 
.1129 
.1486 

177 
177 
178 
179 

157.0 

157-2 
1574 
157-6 
157-8 

8.9664 
9.0098 
.0535 
.0973 
•1413 

217 
218 
219 
220 

167.0 

167.2 
167.4 
167.6 
167.8 

11.3689 
.4220 
4752 
•  5287 
•  5824 

265 
266 
267 
268 

177.0 

177.2 

1774 
177.6 

177-8 

14.2894 
•3536 

.4181 

.4828 
.5478 

321 
323 
324 
325 

1  80 

221 

270 

326 

148.0 

148.2 
148.4 
148.6 
148.8 

7-1845 
.2206 
.2568 
.2932 
.3297 

1  80 
181 
182 
183 

158.0 

158.2 
158.4 
158.6 
158.8 

9-1855 
.2299 

•  2745 
.3192 
.3641 

222 
223 
224 
225 

168.0 

168.2 
168.4 
1  68.6 
168.8 

11.6363 
.6904 
•  7447 
•7993 
-8540 

271 
272 

273 
274 

178.0 

178.2 
178.4 
178.6 
178.8 

14.6131 
.6785 

-7443 
.8102 

.8764 

327 
329 
330 
331 

183 

226 

275 

332  ; 

149.0 

149.2 
149.4 
149.6 
149.8 

7-3664 
.4032 
.4402 
4774 
•5I47- 

184 
185 
186 
187 
187 

159.0 

159-2 
1594 
159-6 
159-8 

9.4092 
•4545 
•4999 
.5456 

226 
227 
228 
229 
230 

169.0 

169.2 
169.4 
169.6 
169.8 

11.9090 
.9641 
12.0195 

-0751 
.1309 

276 

277 
278 
279 
280 

179.0 

179.2 

1794 
179.6 
179-8 

14.9429 
15.0096 
.0765 
•1437 

.2112 

334 
335 
336 
337 
339 

SMITHSONIAN  TABLES. 


T26 


TABLE   35. 


PRESSURE    OF   AQUEOUS    VAPOR. 
(Brock.} 

ENGLISH    MEASURES. 


Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

Temper- 
ature. 

Vapor 
Pressure. 

Diff. 
for 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

F. 

Inches. 

I80?0 

180.2 
180.4 

15.2789 
.3468 
.4150 

340 

I90?0 

190.2 
190.4 

19.0009 
.0825 
.1643 

408 
409 

200?0 

2OO.  2 
200.4 

23-4530 
•5502 
.6478 

486 
488 

Ar\r\ 

2IO?0 

2IO.2 
2IO.4 

28.7497 
•  8651 
.9809 

577 
579 

180.6 
180.8 

.4835 
•5522 

342 
344 

190.6 
190.8 

.2464 
.3288 

411 

412 

200.6 
200.8 

•7457 
.8440 

49° 
491 

210.6 
210.8 

29.0972 
.2138 

583 

345 

414 

493 

585 

181.0 

181.2 
i  181.4 
181.6 
181.8 

15.6212 
.6904 

•7599 
.8296 
.8996 

346 
347 
349 
350 

191.0 

191.2 
191.4 
191.6 
191.8 

I94H5 

.4945 
.5778 
.6614 
-7453 

415 
416 
418 
419 

201.0 

2OI.2 
2OI.4 
201.6 
201.8 

23.9426 
24.0415 
.1408 
.2404 
.3404 

495 
497 
498 
500 

211.0 

211.  2 
2II.4 
2II.6 
2II.8 

29.3308 
.4482 
.5660 
.6842 
.8028 

587 
589 
591 
593 

351 

421 

502 

595 

182.0 

182.2 
182.4 
182.6 
182.8 

15.9699 
16.0404 

.1112 
.1822 
•2535 

353 
354 
355 

357 

192.0 

192.2 
192.4 
192.6 
192.8 

19.8295 
.9140 
.9988 
20.0839 
•1693 

422 

424 
426 

427 

202.0 

2O2.  2 
202.4 
202.6 
202.8 

24.4407 

.5414 
.6424 

.7438 
.8455 

503 
505 
507 
509 

212.0 

212.2 
212.4 
212.6 
212.8 

29.9218 
30.0412 
.l6lO 
.2813 
.4019 

597 
599 
601 
603 

358. 

429 

5IO 

605 

183.0 

183.2 
183.4 
183.6 
183.8 

16.3250 
.3968 
.4689 

.5413 
.6139 

359 

362 
363 

193.0 

193.2 

193-4 
193.6 
193.8 

20.2550 
.3410 
•4273 

430 
432 
433 
435 

203.0 

203.2 
203.4 
203.6 
203.8 

24.9476 
25.0500 
.1528 
•2559 
•3594 

512 
514 

518 

213.0 

213.2 
2134 
213.6 
213.8 

30.5229 

.6444 
.7662 
.8885 
3I.OIII 

607 
609 
611 
613 

364 

436 

S  *Q 

615 

184.0 

184.2 
184.4 
184.6 
184.8 

16.6868 

-7599 
.8334 
.9071 
.9810 

366 
367 
368 
370 

194.0 

194.2 
194.4 
194.6 
194.8 

20.6881 
•7756 
.8635 
.9517 
21.0402 

438 
439 
441 
442 

204.0 

204.2 
204.4 
204.6 
204.8 

25-4633 
.5675 
.6720 

.7769 
.8822 

521 
523 
525 

527 

214.0 

371 

444 

528 

185.0 

185.2 

17-0552 
.1297 

373 

195.0 

195.2 

21.1289 
.2180 

446 

205.0 

205.2 

25.9878 
26.0939 

530 

185.4 

.2045 

374 

1954 

.3074 

447 

A  Af\ 

205.4 

.2002 

532 

185.6 
185.8 

•2795 
.3548 

375 
377 

195-6 
195.8 

•3971 
.4872 

449 
450 

205.6 
205.8 

.3070 
.4141 

534 
536 

378 

452 

537 

186.0 

17.4304 

196.0 

21.5776 

AC.  A 

206.0 

26.5215 

186.2 

•5063 

379 

196.2 

..6683 

454 

206.2 

.6294 

539 

186.4 
186.6 
186.8 

.5824 
.6588 

•7355 

382 
384 

196.4 
196.6 
196.8 

•7593 
.8506 
.9422 

455 
457 
458 

206.4 
206.6 
206.8 

•  7376 
.8461 
•9551 

543 
545 

385 

460 

547 

187.0 

187.2 
187.4 
187.6 

17.8125 
.8897 
.9672 
18.0451 

386 
388 
389 

197.0 

197.2 

1974 
197.6 

22.0342 
.1265 
.2191 
.3120 

462 
463 
465 
A  66 

207.0 

207.2 
207.4 
207.6 

27.0644 
.1741 
.2842 
.3946 

549 
550 
552 

C  C  A 

187.8 

.1231 

39 

197.8 

•4053 

ZJAJL/ 

207.8 

.5054 

004 

392 

468 

556 

188.0 

i  188.2 

18.2015 
.2802 

393 

198.0 

198.2 

22.4989 
.5928 

470 

208.0 

208.2 

27.6166 
.7282 

558 
c£n 

188.4 
188.6 
188.8 

•3591 
.4383 
•5178 

395 
396 
398 

198.4 
198.6 
198.8 

.6871 
.7816 
.8765 

473 
475 

208.4 
208.6 
208.8 

.8402 

.9525 
28.0652 

5DO 
562 
564 

399 

476 

566 

189.0 

189.2 
189.4 

18.5976 
.6777 

400 
402 

AC\1 

199.0 

199.2 
199.4 

22.9718 
23.0673 
.1632 

478 
480 

AQr 

209.0 

209.2 
209.4 

28.1784 
.2919 
.4057 

568 
569 

189.6 
189.8 

'.8388 
.9197 

4uo 

405 

406 

199.6 
199.8 

•2595 

ZJ.O1 

483 
485 

209.6 
209.8 

.5200 
.6346 

573 
575 

SMITHSONIAN  TABLES. 


127 


TABLE   36. 


PRESSURE    OF   AQUEOUS    VAPOR. 

(Brock.} 
METRIC    MEASURES. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

-  29° 

0.42 

0.41 

0.41 

0.41 

0.40 

0.40 

0.40 

0-39 

0-39 

0.38 

28 

0.46 

0.46 

0-45 

0-45 

0.44 

0-44 

0.43 

0.43 

0-43 

0.42 

27 

0.50 

0.50 

0.50 

0.49 

0-49 

0.48 

0.48 

0.47 

0-47 

0.46 

26 

0.55 

0.55 

0-54 

0-54 

0-53 

0.53 

0.52 

0.52 

0.51 

0.51 

-  25 

0.61 

O.6o 

O.6o 

0-59 

0.58 

0.58 

0-57 

0-57 

0.56 

0.56 

24 

0.66 

0.66 

0.65 

0.65 

0.64 

0.63 

0.63 

0.62 

0.62 

0.61 

23 

0.73 

0.72 

0.71 

0.71 

0.70 

0.69 

0.69 

0.68 

0.68 

0.67 

22 

0.79 

0.79 

0.78 

0.77 

0.77 

0.76 

0-75 

o.75 

0.74 

0-73  . 

21 

0.87 

0.86 

0.85 

0.84 

0.84 

0.83 

0.82 

0.81 

0.81 

0.80 

-  20 

0.94 

0.94 

0-93 

0.92 

0.91 

0.90 

0.90 

0.89 

0.88 

0.87 

19 

•03 

.02 

.01 

.OO 

o-99 

0.99 

0.98 

0.97 

0.96 

0-95 

18 

.12 

.11 

.10 

.09 

.08 

1.07 

.06 

.06 

•05 

1.04 

17 

.22 

.21 

.20 

•19 

.18 

I.I7 

.16 

.15 

.14 

I-I3 

16 

•32 

•31 

.30 

•29 

.28 

1.27 

.26 

•25 

.24 

1.23 

-  15 

•44 

.43 

.42 

.40 

•39 

1.38 

.37 

•36 

•35 

1-34 

14 

•56 

•55 

•54 

•52 

I-5I 

1.50 

•49 

.48 

1.46 

i-45 

13 

.69 

.68 

•67 

•65 

1.64 

1.63 

.61 

.60 

•59 

i-57 

12 

.84 

.82 

1.81 

•79 

1.78 

1.76 

•75 

•74 

.72 

1.71 

II 

1.99 

•97 

1.96 

•94 

i-93 

1.91 

.90 

.88 

-87 

1.85 

-  10 

2.15 

2-13 

2.12 

2.IO 

2.08 

2.0/ 

2.05 

2.04 

2.  02 

2.00 

9 

2-33 

2.31 

2.29 

2.27 

2.26 

2.24 

2.22 

2.  2O 

2.19 

2.17 

8 

2.51 

2.50 

2.48 

2.46 

2.44 

2.42 

2.40 

2.38 

2.36 

2-34 

7 

2.72 

2.69 

2.67 

2.65 

2.63 

2.6] 

2-59 

2-57 

2-55 

2-53 

6 

2-93 

2.91 

2.89 

2.86 

2.84 

2.8s 

2.80 

2.78 

2.76 

2.74 

-    5 

3-i6 

3-14 

3-II 

3-09 

3-07 

3.04 

3-02 

3-00 

2.98 

2-95 

4 

3-41 

3.38 

3.36 

3-33 

3-31 

3.28 

3.26 

3.23 

3-21 

3.18 

3 

3-67 

3-64 

3.62 

3-59 

3.56 

3-54 

3-51 

3.48 

3-46 

3-43 

2 

3-95 

3-92 

3.89 

3.86 

3-84 

3-8i 

3.78 

3-75 

3-72 

3-70 

I 

4-25 

4.22 

4.19 

4.16 

4-13 

4.  10 

4.07 

4-04 

4.01 

3.98 

-    0 

4-57 

4-54 

4-50 

4-47 

4-44 

4.41 

4-37' 

4-34 

4.31 

4.28 

Values  for  temperatures  between  o°  and  45°  are  given  in  Table  43. 

+  45° 

71-36 

7L73 

72.IO 

72.48 

72.85 

72.23 

73.60 

73.98 

74.36 

74.75 

46 

75.13 

75-52 

75.91 

76.30 

76.69 

77.08 

77-47 

77.87 

78.27 

78.67 

47 

79.07 

79-47 

79-88 

80.29 

80.70 

81.11 

81.52 

81.93 

82.35 

82.77 

48 

83-19 

83.61 

84.03 

84.46 

84.89 

84.32 

85.75 

86.18 

86.61 

87.05 

49 

87.49 

87.93 

88.37 

88.81 

89.26 

89.71 

90.16 

90.6l 

91.06 

9J.52 

50 

91.98 

92.44 

92.90 

93.36 

93.83 

94-30 

94-77 

95-24 

95.71 

96.19 

5i 

96.66 

97.14 

97.63 

98.11 

98.60 

99.08 

99.57 

100.07 

100.56 

101.06 

52 

101.55 

102.05 

102.56 

103.06 

103.57 

104.08 

104.59 

105.10 

105.62 

106.14 

53 

106.65 

107.18 

107.70 

108.23 

108.76 

109.29 

109.82 

H0.35 

110.89 

111.43 

54 

111.97 

112.52 

113.06 

113.61 

114.16 

114.72 

115.27 

H5.83 

116.39 

116.95 

55 

117.52 

118.08 

II8.65 

119.22 

119.80 

120.37 

120.95 

121.53 

122.12 

122.70 

56 

123.29 

123.88 

124.48 

125.07 

125.67 

126.27 

126.87 

127.48 

128.09 

128.70 

57 

129.31 

129.92 

130.54 

131.16 

I3L79 

132.41 

133-04 

133.67 

134.30 

134.94 

58 

135.58 

136.22 

136.86 

137.50 

138.15 

138.80 

139.46 

140.11 

140.77 

I4L43 

59 

142.10 

142.76 

143-43 

144.11 

144.78 

145.46 

146.14 

146.82 

147.51 

148.19 

60 

148.88 

I49-58 

150.27 

150.97 

151.68 

152-38 

153-09 

I53-80 

I54.5I 

155.23 

SMITHSONIAN  TABLES. 


128 


TABLE   36. 


PRESSURE    OF   AQUEOUS   VAPOR. 

(Brock.} 
METRIC    MEASURES. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

60° 

148.88 

I49.58 

150.27 

150.97 

151.68 

152.38 

I53.09 

153.80 

154.51 

I55.23 

61 

155-95 

156.67 

157-39 

158.12 

158.85 

I59.58 

160.32 

161.06 

161.80 

162.54 

62 

163.29 

164.04 

164.79 

165.55 

166.31 

167.07 

167.83 

168.60 

169-37 

170.15 

63 

170.92 

171.70 

172.49 

173.27 

174.06 

•I74.85 

175.65 

176.45 

177.25 

178.05 

64 

178.86 

179.67 

180.48 

181.30 

182.12 

182.94 

183.77 

184.60 

185-43 

186.26 

65 

187.10 

187.94 

188.79 

189.64 

190.49 

!9i.34 

192.20 

193.06 

J93-93 

194.80 

66 

I95-67 

196.54 

197.42 

198.30 

199.18 

200.07 

200.96 

201.86 

202.75 

203.65 

67 

204.56 

205.47 

206.38 

207.29 

208.21 

209.13 

2IO.o6 

210.98 

211.92 

212.85 

68 

213.79 

214-73 

215.68 

216.63 

217.58 

218.54 

219.50 

220.46 

221.43 

222.40 

69 

223.37 

224.35 

225.33 

226.31 

227.30 

228.29 

229.29 

230.29 

231.29 

232.30 

70 

233-3I 

234.32 

235.34 

236.36 

237-39 

238.42 

239.45 

240.48 

241.52 

242.57 

7i 

243.62 

244.67 

245.72 

246.78 

247.85 

248.91 

249.98 

251.06 

252.14 

253.22 

72 

-54-30 

255-40 

256.49 

257-59 

258.69 

259-80 

260.91 

262.02 

263.14 

264.26 

73 

265.38 

266.51 

267.65 

268.79 

269.93 

271.08 

272.23 

273.38 

'  274.54 

275.70 

74 

276.87 

278.04 

279.21 

280.39 

281.58 

282.76 

283.95 

285.15 

286.35 

287.56 

75 

288.76 

289.98 

291.19 

292.42 

293.64 

294.87 

296.  1  1 

297.34 

298.59 

299.83 

76 

301.09 

302.34 

303.60 

304.87 

306.14 

307.41 

308.69 

309.97 

311.26 

312.55 

77 

313.85 

315.15 

316.45 

317.76 

319.07 

320.39 

321.72 

323-04 

324.38 

325.71  | 

78 

327.05 

328.40 

329-75 

331.11 

332.47 

333.83 

335-20 

336.58 

337.95 

339-34 

79 

340.73 

342.12 

343-52 

344.92 

346.33 

347.74 

349-  1  6 

350.58 

352.oi 

353-44 

80 

354.87 

356.31 

357.76 

359-21 

360.67 

362.13 

363.59 

365-07 

366.54 

368.02 

81 

369.51 

371.00 

372.49 

374.00 

375.50 

377-01 

378.53 

380.05 

381.58 

383.11 

82 

384.64 

386.18 

387.73 

389-28 

390.84 

392.40 

393-97 

395-54 

397.12 

398.70 

83 

400.29 

401.89 

403.49 

405.09 

406.70 

408.32 

409.94 

411.56 

413.19 

414.83 

84 

416.47 

418.12 

419.77 

421-43 

423.09 

424.76 

426.44 

428.12 

429.81 

43L50 

85 

433-19 

434.90 

436.60 

438.32 

440.04 

441.76 

443-49 

445-23 

446.97 

448.72 

86 

450.47 

452.23 

454.00 

455-77 

457-54 

459-33 

461.11 

462.91 

464.71 

466.51 

87 

468.32 

470.14 

471.96 

473-79 

475.63 

477.47 

479.32 

481.17 

483-03 

484.89 

88 

486.76 

488.64 

490.52 

492.41 

494.31 

496.21 

498.12 

500.03 

501.95 

503-87 

89 

505.31 

507.74 

509-69 

511.64 

5I3.60 

515-56 

517.53 

5I9-50 

521.48 

523.47 

90 

52547 

527.47 

529-48 

531-49 

533-51 

535-54 

537.57- 

539-6i 

541.65 

543.71 

91 

545-77 

547.83 

549-9° 

55L98 

554.07 

556.16 

558.26 

560.36 

562.47 

564.59 

92 

566.71 

568.85 

570.98 

573-13 

575-28 

577-44 

579.61  581.78 

583-96 

586.14 

93 

588.33 

590-53 

592.74 

594-95 

597.17 

599-40 

601.64  !  603.88 

606.13 

608.38 

94 

610.64 

612.91 

615.19 

617.47 

619.76 

622.06 

624.37 

626.68 

629.00 

631.32 

95 

633-66 

636.00 

638.35 

640.70 

643.06 

645.43 

647.81 

650.  20 

652.59 

654.99 

96 

657.40 

659.81 

662.23 

664.66 

667.  10 

669.54 

672.00 

674.45 

676.92 

679.40 

97 

681.88 

684.37 

686.87 

689.37 

691.89 

694.41 

696.93 

699.47 

702.02 

704.57 

98 

707.13 

709.69 

712.27 

714.85 

717.44 

720.04 

722.65 

725.27 

727.89 

730.52 

99 

733-16 

735.81 

738.46 

74LI3 

743.80 

746.48 

749-  1  7 

751.86 

754-57 

757.28' 

100 

760.00 

762.73 

765.47 

768.21 

770.97 

773-73 

776.50 

779.28 

782.07 

784.86 

101 

787.67 

SMITHSONIAN  TABLES 


129 


TABLE  37. 


PRESSURE  OF  AQUEOUS  VAPOR  OVER  ICE. 

( C.  F.  Marvin. ) 
ENGLISH  AND  METRIC  MEASURE. 


Tempera- 

0 °0           0.°2 

0.°4 

0.°6 

0.°8 

Tempera- 

O.°0 

O.°5 

ture. 

ture. 

F. 

Inch.              Inch. 

Inch. 

Inch. 

luch. 

C. 

mm.             mm. 

—  60° 

O.OOIO 

—  50° 

0.030 

0.028 

59 

.0011 

O.OOII 

o.ooir 

0.00  I  I 

O.OOIO 

49 

-034 

.032 

58 

.0012 

.0012 

.0011 

.0011 

.0011 

48 

•039 

.036 

57 

.0013 

.0013 

.0012 

.0012 

.0012 

47 

.044 

.041 

56 

.0013 

.0013 

.0013 

.0013 

.0013 

46 

.050 

.047 

—  55° 

0.0315 

0.0014 

0.0014 

O.OOI4 

0.0014 

—  45° 

0.057 

°-°53 

54 

.0016 

.0015 

.0015 

.0015 

.0015 

44 

.064 

.061 

53 

.00  7 

.0017 

.0017 

.0016 

.0016 

43 

.072             .068 

52 

.0018 

.0018 

.0018 

.OOI7 

.0017 

42 

.o8c           .077 

51 

.0019 

.0019 

.0019 

.0019 

.0018 

4i 

.090           .086 

—  50° 

0  0021 

0.0020 

0.0020 

O.OO:O 

O.OO2O 

—  40° 

o.ioo        0.095 

49 

.0022 

.0022 

.0022 

.0022               .0021 

39 

.109           .104 

48 

.0024 

.OJ24 

.0023 

.0025 

0023 

38 

.120                .II5 

47 

.0026 

.0025 

.0025 

.0025 

.OO24 

37 

.133        .126 

46 

.0027 

.0027 

.0027               .0026 

.002b 

36 

.147       .140 

—  45° 

O.OO29 

0.0029 

0.0028 

O.OO28 

0.0028 

—  35° 

0.165     i    0.156 

44 

.00^1 

•°->3t 

.O  )\Q 

.0030 

.0030 

34 

.185       .175 

43 

-00.^3 

•0033 

.0032 

.0032 

.0031 

33 

.207        .196 

42 

•0035 

•°Q35 

.0034 

.0034 

.0033 

72 

.230       .219 

4i 

.0037 

.0337 

.0036 

.0036 

.0035 

31 

.256        .243 

—  40° 

0.0039 

0.0039 

0.0038 

0.0038 

0.0037 

—  30° 

0.284 

0.270 

39 

.0041 

.0041 

.0041 

.0040 

.0040 

2Q 

.315 

.299 

38 

.0044 

.0043 

.0043 

.0042 

.0042 

28 

.350 

•332 

37 

.0046 

.0045 

.0045 

.0044 

0044 

27 

.389 

.368 

36 

.0048 

.0048 

.  >oj7 

.0047 

.0046 

26 

.432 

.410 

—  35° 

0.0051 

0.0051 

0.0050 

O.0050 

0.0049 

—  25° 

0.478 

0-455 

34 

.0054 

.0054 

•°°53 

.0052 

.0052 

33 

.0057 

.0057 

.0056 

.0056 

•0055 

32 

Oo6l 

.0060 

.0059 

.0059 

.0058 

3i 

.0065 

.0064 

.0063 

.0063 

.0062 

—  30° 

0.0069 

0.0069 

0.0067 

0.0067 

0.0066 

29 

.0074 

.0073 

.0072 

.0071 

.0070 

28 

.0078 

.0078 

.0077 

.0076 

.0075 

27 

.0083 

.0083 

.0081 

.0080 

.0080 

26 

.0089 

.0088 

.0087 

.0085               .0085 

_  25° 

0.0094 

0.0093 

0.0092 

0.009! 

o  0089 

24 

.OIOO 

.0098 

.0097 

.OO9" 

.0095 

23 

,OI06 

.0104 

.0103 

.OI02 

.0101 

22 

.OII2              .OIII 

.0109 

.0108 

.0107 

21 

.0119              .OII7 

.0116 

.0115 

.0113 

—  20° 

O.OI26 

0.0124 

O.OI22 

O.OI2I 

O.OI20 

19 

.0133 

.0131 

.0130 

.0128 

.0127 

18 

.0141 

.0139 

.0138 

.0136 

.0135 

17 

.0150 

.0148 

.0146 

.0144 

.0143 

16 

.0159 

•0157 

•0155 

•0153 

.0151 

—  15° 

0.0168 

0.0166 

o  0164 

O.OI62 

0.0160 

SMITHSONIAN  TABLES. 


130 


PRESSURE    OF    AQUEOUS    VAPOR    OVER    ICE. 

(C.  F.  Marvin.} 
ENGLISH    AND    METRIC    MEASURES. 


TABLE   37. 


iTempera- 
ture. 

o.°o 

0.°2 

0.°4 

0.°6 

0.°8 

Tempera- 
ture. 

0.0 

0.5 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

°c. 

mm. 

mm. 

—  15° 

0.0168 

0.0166 

0.0164 

0.0162 

0.0160 

—  25 

0.478 

0-455 

14 

.0178 

.0176 

.0174 

.0172 

.0170 

24 

.528 

.502 

J3 

.0188 

.0186 

.0184 

.0182 

.0180 

23 

.582 

•555 

12 

.0199 

.0196 

.0194 

.0192 

.0190 

22 

.640 

.610 

II 

.0210 

.0208 

.0206 

.0203 

.0201 

21 

.706 

.672 

-10 

O.O222 

O.O22O 

0.0217 

0.0215 

0.0213 

—  20 

0.781 

0.742 

9 

.0234 

.0232 

.0229 

.0227 

.0224 

19 

.863 

.821 

8 

.0247 

.024; 

.02|2 

.0239 

.0237 

18 

•952 

.907 

7 

.0260 

•0257 

•0255 

.0252 

.0249 

17 

1-043 

-997 

6 

•0275 

.0272 

.02^9 

.0266 

.0263 

16 

1.140 

1.091 

—  5 

O.029I 

0.0287 

0.0284 

0.0281 

0.0278 

—  15 

1.246 

1.192 

4 

.0307 

.0304 

.0301 

.0297 

.0294 

14 

1.364 

.303 

3 

•03  5 

.0322 

.0318 

.0315 

.0311 

13 

1.492 

•425 

2 

•0344 

.0340 

•0336 

.0332 

.0329 

12 

1.636 

.563 

I 

•0363 

•0359 

•0355 

.0351 

•0347 

II 

i.  794 

.714 

—  O 

•0383 

•0379 

•°375 

.0371 

.0367 

4-O 

00383 

0.0387 

0.0391 

0.0394 

0.0398 

—  10 

1.961 

1.876 

I 

.0403 

.0407 

.0411 

.0415 

.0419 

9 

2.138 

2.048 

2 

.0423 

.0428 

.0431 

.0436 

.0440 

8 

2.327 

.230 

3 

.0444 

.0449 

•0453 

.0458 

.0462 

7 

2-534 

427 

4 

.0467 

.0472 

.0476 

.0481 

.0486 

6 

2.761 

.645 

5 

0.0491 

0.0495 

0.0500 

0.0505 

0.0510 

—  5 

3.009 

2.883 

6 

•0515 

.0520 

.0526 

•0531 

•0536 

4 

3.276 

3.140 

7 

.0542 

•0547 

•05S3 

.0558 

.0564 

3 

3-564 

3.4i8 

8 

.0570 

.0576 

.0582 

.0587 

•0594 

2 

3.874 

3.716 

9 

.0600 

.0606 

.0612 

.0618 

.0625 

—  I 

4.207 

4.037 

10 

0.0631 

0.0638 

0.0644 

0.0651 

0.0657 

0 

4-568 

4-384 

ii 

.0665 

.0671 

.0678 

.0685 

.0692 

12 

.0699 

.0706 

.0713 

.0720 

.0728 

13 

•  0735 

.0742 

.0750 

•  0757 

.0765 

14 

.0772 

.0780 

.0787 

.0794 

.0802 

15 

0.0810 

0.0818 

00826 

0.0834 

0.0842 

16 

.0850 

•0857 

.0866 

.087.1 

.0882 

17 

.0891 

.0899 

.0907 

.0916 

.0925 

18 

•0933 

.0942 

•0951 

.0960 

.0969 

*9 

.0979 

.0988 

.0998 

.1007 

.1017 

20 

0.1026 

0.1036 

o.  1046 

o.  1056 

0.1067 

21 

.1077 

.1087 

.1098 

.1108 

.1119 

22 

.1130 

.1141 

•1152 

.  1  1,63 

.1174 

23 

.1185 

.1196 

.1207 

.1219 

.1230 

:4 

.1242 

•  1254 

.1266 

.1278 

.  1290 

25 

o.  1302 

0.1314 

0.1327 

0.1339 

o  1352 

26 

•1365 

•  1377 

.1390 

.1403 

.1416 

27 

•143° 

U43 

.1456 

.1470 

.1483 

28 

•1497 

.1511 

•1525 

•1539 

•1554 

29 

.1568 

.1582 

-1596 

.1611 

.1626 

30 

0.1641 

0.1656 

i  0.1671 

0.1687 

0.1702 

31 

.1718 

•1734 

•  I/So 

.1766 

.1782 

32 

.1798 

SMITHSONIAN  TABLES. 


TABLE   38. 

WEIGHT    OF 


( / '  por  over  ice — Marvin. ) 


A    CUBIC    FOOT    OF    SATURATED    VAPOR. 

ENGLISH     MEASURES. 

(  Vapor  over  water — Brock.} 


Temper- 
ature. 

i  o.°o 

0.°5 

Diff 

for 

0° 

Temper- 
ature. 

O.°0 

0.°5 

Diff 
for 
O.°l 

Temper- 
ature. 

O.°0 

0.°5 

i  Diff. 
for 
O.°l 

Grains 

;  <  -rains 

Grains 

Grains 

Grains 

Grains 

F. 

tr^y. 

troy. 

F. 

troy. 

troy. 

F. 

troy. 

troy. 

—  19° 

0.174 

o.  169 

-f26c 

1.623 

1.659 

4 

71° 

8.240 

8-372 

27 

18 

.  1^4 

.179 

27 

1.697 

1.734 

4 

72 

8.5oS 

8.644 

27 

17 

.196 

.I89 

28 

1-773 

1.812 

4 

73 

8.782 

8.923 

i   2S 

,  16 

.207 

.2OI 

29 

1.853 

1.894 

4 

74 

9-065 

9.210 

29 

15 

0.218 

0.212 

30 

1-935 

1.978 

4 

75 

9.356 

9.504 

30 

14 

.231 

.224 

3i 

2.022 

2.067 

4 

76 

9.655 

9.837 

3f 

13 

.243 

•237 

32 

2.113 

2.153 

8 

77 

9.961 

10.  118 

32 

12 

.257 

.250 

33 

2.194 

2.236 

8 

78 

10.277 

10.4^8 

33 

II 

.270 

•263 

34 

2.279 

2.322 

9 

79 

10.601 

10.766 

33  ; 

10 

0.285 

0.278 

35 

2.366 

2.411 

Q 

80 

10  933 

i  i  .  103 

34 

9 

.300 

•293 

I 

36 

2-457 

2-503 

9 

8l 

11.275 

H.450 

35 

8 

.316 

.307 

37 

2.550 

2.598 

IO 

82 

11.626 

11.805 

36 

7 

.332 

.324 

38 

2.646 

2-695 

10 

83 

ii  987 

12.  171 

37 

6 

.350 

•342 

39 

2.746 

2.797 

10 

84 

12.356 

12-545 

38 

5 

0.370 

0-359 

40 

2.849 

2.901 

II 

85 

12.736 

12.930 

39 

4 

.389 

•379 

4« 

2-955 

3-o  8 

II 

86 

13.127 

13.325 

40 

3 

.411 

.400 

42 

3.064 

3.120 

II 

87 

13-526 

13.730 

4i 

2 

•  434 

.422 

43 

3-177 

3.235 

12 

88 

13-937 

14.146 

42 

I 

.457 

•  445 

44 

3.294 

3-354 

12 

89 

14.358 

14-573 

43 

—  0 

.481 

.469 

+  0 

0.481 

°-493 

45 

3-4U 

3-477 

12 

90 

14.791 

15.011 

44 

i 

.505 

•5i7 

46 

3-539 

3-603 

13 

9i 

15-234 

15.460 

45 

2 

•529 

•  542 

47 

3.667 

3-733 

13 

92 

15.688 

15.920 

47 

3 

•554 

•569 

2 

48 

3.800 

3.868 

14 

93 

16.155 

16  393 

48 

4 

.582 

.596 

I 

49 

3-936 

4.006 

14 

94 

16.634 

16.877 

49 

5 

0.610 

0.624 

I 

50 

4.076 

4.148 

15 

95 

17.124 

17.374 

5o 

6 

•639 

•  654 

2 

5i 

4.222 

4.296 

15 

96 

17.626 

17.883 

52  j 

7 

•671 

.687 

2 

52 

4.372 

4.448 

15 

97 

18.142 

18.404 

53 

8 

.704 

.722 

2 

53 

4.526 

4.604 

16 

98 

18.671 

1  8  940 

54 

9 

•739 

•  757 

2 

54 

4.685 

4.766 

16 

99 

19.212 

19-487 

55 

10 

0.776 

0.796 

2 

55 

4.849 

4-933 

i7 

100 

19.766 

20  .  049 

57 

ii 

.816 

.836 

2 

56 

5.018 

5-103 

17 

101 

20.335 

20.624 

58 

12 

.856 

•877 

2 

57 

5-I9I 

5-280 

18 

102 

20.917 

21.214 

60 

13 

.898 

.920 

2 

58 

5.371 

5.462 

18 

103 

21.514 

21.817 

61 

H 

.941 

•963 

2 

59 

5-555 

5.649 

19 

104 

22.125 

22.436 

62 

15 

0.985 

1.009 

2 

60 

5-744 

5.842 

20 

105 

22.751 

23.070 

64 

16 

.032 

1-055 

2 

61 

5.941 

6.040 

20 

1  06 

23.392 

23.718 

66 

17 

.079 

1.104 

2 

62 

6.142 

6.245 

21 

107 

24  .  048 

24.382 

67 

18 

.128 

I.I55 

3 

63 

6.350 

6.456 

21 

1  08 

24.720 

25.062 

69 

19 

.181 

1.208 

3 

64 

6.563 

6.672 

22 

109 

25.408 

25.758 

70 

20 

•235 

1.264 

3 

65 

6.782 

6.895 

23 

110 

25.  112 

26.470 

72 

21 

.294 

1.324 

3 

66 

7.009 

7.124 

23 

in 

26.832 

27.199 

74 

22 

•355 

1.387 

3 

67 

7.241 

7.360 

24 

112 

27-5/0 

27    946 

75 

23 

.418 

1.450 

3 

68 

7.480 

7.6)2 

25 

113 

28.325 

28  .  708 

77 

24 

•  483 

I-5I7 

3 

69 

7.726 

7.852 

25 

114 

29.096 

29  .  489 

79 

+  25 

i-55i 

1.587 

4 

70 

7.980 

8.109 

26 

115 

29.887    | 

SMITHSONIAN  TABLES. 


I32 


TABLE  39. 
WEIGHT  OF  A  CUBIC  METRE  OF  SATURATED  VAPOR. 

METRIC  MEASURES. 
Vapor  over  ice— Marvin, )  (  Vapor  over  ivater—Broch. ) 


Temper- 

Temper- 

O.°0 

0.°5 

Temper- 

o.°o 

0.°2 

0.°4 

0.°6 

0.°8 

ature. 

ature. 

ature. 

C. 

Gram's 

C. 

Gram's. 

Gram's. 

C. 

Gram's. 

Gram's. 

Gram's. 

Gram's 

Gram's. 

—  29° 

0.373 

—  17° 

•177 

.128 

—  5° 

3-244 

S-^i 

3-139 

3088 

3-038 

28 

•413 

16 

.282 

.229 

4 

3-5I8 

3.462 

3-407 

3  352 

3298 

27 

•457 

15 

•395 

-337 

3 

3813 

3-754 

3-694 

3.634 

35/6 

26 

•  505 

14 

.519 

.456 

2 

4.130 

4-065 

4.001 

3-937 

3.875 

25 

•  557 

13 

.658 

.586 

I 

4.468 

4-399 

433° 

4.262 

4.196 

24 

.613 

12 

.811 

-733 

O 

4-834 

4-759 

4.685 

4.612 

4-540 

—  23° 

•  673 

—  11° 

1.978 

1.894 

+  o 

4.835 

4.901 

4-969 

5.037 

5.106 

22 

•  737 

10 

2.154 

2.o6.s 

i 

5.176 

5-247 

5.3i8 

5-391 

5-464 

21 

.810 

9 

2.340 

2.246 

'2 

5.538 

5-613 

5-689 

5.766 

5.844 

2O 

.892 

8 

2  537 

2.436 

3 

5.922 

6.  002 

6082 

6.164 

6.246 

19 

.982 

7 

2.752 

2  641 

4 

6.330 

6.414 

6.499 

6.586 

6673 

—  18 

1.079 

—   6 

2.988 

2.867 

+  5 

6.761 

6.851 

6.941 

7.033 

7.125 

Temper- 
ature. 

O.°0 

O.°l 

0.°2 

0.°3 

O.°4 

0.°5 

0.°6 

0.°7 

0.°8 

0.°9 

C. 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

Gram'.s. 

Gram's 

Gram's. 

Gram's. 

Gram's. 

Gram's. 

+  6° 

7-219 

7.266 

7.313 

7361 

7.409 

7-457 

7.506 

7-554 

7.604 

7653 

7 

7.703 

7-753 

7.803 

7-853 

7.904 

7-955 

8.007 

8.058 

8.  1  10 

8.162 

8 

8.215 

8.268 

8-321 

8-374 

8.428 

8482 

8.536 

8.591 

8.646 

8.701 

9 

8.757 

8.813 

8.869 

8.925 

8982 

9-039 

9.097 

9  154 

9.212 

9.271 

10 

9-329 

9.388 

9.448 

9-507 

9.567 

9.628 

9.688 

9-749 

9.811 

9.872 

ii 

9934 

9-997 

10.059 

IO.I22 

IO.I86 

10.250 

10.314 

10.378 

10.443 

10.508 

12 

IQ.574 

10.640 

10.706 

10.772 

10.839 

10.907 

10.974 

11.042. 

ii  i  ii 

11.179 

T3 

11.249 

11.318 

11.388 

11.458 

11.529 

1  1.  600 

11.671 

H-743 

11.815 

11.888 

H 

11.961 

12.034 

12.108 

I2.I82 

12.256 

12.331 

12.406 

12/482 

12.558 

12.635 

15 

12.712 

12.789 

12.867 

12-945 

13.023 

13.102 

13.182 

13.262 

13.342 

13-423 

16 

13-504 

13-585 

13.667 

13-749 

13.832 

13.916 

13.999 

14.083 

14.168 

14-253 

17 

14-338 

14424 

14.510 

14-597 

14.684 

14.772 

14.860 

14.949 

15-038 

15.127 

18 

15.217 

15-308 

I5-399 

15  49° 

15.582 

15-674 

15.767 

15  860 

15-954 

16.048 

19 

16.143 

16.238 

16.334 

16.430 

16.527 

16.624 

16.722 

16.820 

16  919 

17.018 

20 

17.117 

17.217 

17.318 

17.419 

17.521 

17.623 

17.726 

17.829 

17-933 

18.037 

21 

18.142 

18.248 

i8354 

18460 

18.567 

18.675 

18.783 

18.891 

19.000 

19.110 

22 

19.220 

19-331 

19.442 

19-554 

19.667 

19.780 

I9-893 

20  008 

20.122 

20.  238 

23 

20.353 

20.470 

20.587 

20.704 

20.823 

20.941 

21.061 

21.181 

21.301 

21.422 

24 

21-544 

21.666 

21.789 

21.913 

22.037 

22.162 

22.287 

22.413 

22  540 

22.667 

25 

22.795 

22.923 

23.052 

23.182 

23.312 

23.443 

23.575 

23.707 

23.840 

23-974 

26 

24.108 

24.242 

24-378 

24  5H 

24.651 

24.788 

24.926 

25-065 

25.205 

25.345 

27 

25-486 

25.627 

25.769 

25.912 

26.056 

26.  200 

2t>.345 

26.490 

26.637 

26.7^4 

28 

26931 

27.080 

27.229 

27.379 

27.529 

27.680 

27.832 

27.985 

28.138 

28.292 

29 

28.447 

28.603 

28.759 

28.916 

29074 

29.233 

29.392 

29552 

29.713 

29.874 

30 

30.036 

30.199 

30.363 

30-528 

30.693 

30.859 

31.026 

31.194 

3L362 

3J-532 

3i 

31.702 

31-873 

32.044 

.32.217 

32.390 

32.564 

32.739 

32.914 

33.091 

33-268 

o2 

33446 

33-625 

33-8o4 

33.985 

34.  1  66 

34-348 

34.531 

34.715 

34  900 

~\  s.o86 

33 

35-272 

35-459 

35.647 

35.836 

36.026 

36.217 

36.409 

36.601 

36.794 

36.988 

34 

37-183 

37-379 

37.576 

37-774 

37.972 

38.172 

38.372 

38.574 

38.776 

38.979 

35 

39-I83 

39.388 

39-594 

39.801 

40.  008 

40.217 

40.427 

40.637 

40  849 

41.061 

36 

41.274 

41.489 

41.704 

41.920 

42.137 

42356 

42575 

42.795 

43.016 

43-238 

37 

43.461 

43-685 

43.9io 

44.136 

44.363 

44.591 

44.820 

45  050 

45.281 

45-513 

38 

45  746 

46.980 

46.215 

46.451 

46.689 

46.927 

47.166 

47.406 

47.648 

47.890 

39 

48.133 

48.378 

48.623 

48.870 

49.118 

49.366 

49.616 

49-867 

50.119 

50.372 

SMITHSONIAN  TABLES. 


133 


TABLE  40. 

REDUCTION    OF    PSYCH  ROM  ETRIC    OBSERVATIONS. 

ENGLISH     MEASURES. 
Pressure    of    Aqueous    Vapor. 

(Below  32° —  Vapor  over  ice — Marvin. )  (Above  32°—  Vapor  over  water— Broch. ) 


ture. 

0° 

10 

2° 

3° 

4° 

5° 

6° 

7° 

8° 

9° 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

-30° 

0.007 

0.006 

O.OO6 

0.006 

0.005 

0.005 

0.005 

0.005 

0.004 

0.004 

—  20 

•013 

.OI2 

.Oil 

.on 

.OIO 

.009 

.009 

.008 

.008 

.007 

—    10 

.022 

.021 

.O2O 

.019 

.018 

.017 

.016 

.015 

.014 

.013 

—    o 

.038 

.036 

•034 

•033 

.031 

.029 

.027 

.026 

.025 

.023 

+    0 

0.038 

0.040 

0.042 

0.044 

0.047 

0.049 

0.052 

0.054 

0.057 

0.060 

10 

•063 

.066 

.070 

•074 

.077 

.081 

.085 

.089 

•093 

.098 

20 

.103 

.108 

•113 

.118 

.124 

.130 

.136 

•143 

.150 

•157 

Tempera- 
ture. 

0?0 

0?. 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

+  30° 

0.164 

0.165 

0.166 

0.166 

0.167 

0.168 

0.169 

0.169 

0.170 

0.171 

31 

.172 

•173 

•173 

.174 

•175 

.176 

.177 

.177 

.178 

.179 

32 

.180 

.181 

.182 

•183 

.184 

.184 

•  I85 

.186 

.186 

33 

.187 

!i88 

.189 

.190 

.190 

.191 

.192 

•193 

•193 

.194 

34 

'  .195 

.196 

.196 

.197 

"198 

.199 

.200 

.200 

.201 

.202 

35 

0.203 

0.204 

0.204 

0.205 

0.206 

0.207 

0.208 

0.208 

O.2O9 

O.2IO 

36 

.211 

.212 

•213 

•213 

.214 

.215 

.216 

.217 

.218 

.219 

37 

.219 

.220 

.221 

.222 

•223 

.224 

•  225 

•225 

.226 

.227 

38 

.228 

.229 

.230 

.231 

.232 

•233 

•233 

•234 

.235 

.236 

39 

•237 

.238 

•239 

.240 

.241 

.242 

•243 

•244 

•245 

.246 

40 

0.247 

0.247 

0.248 

0.249 

0.250 

0.251 

0.252 

0.253 

0.254 

0.255   , 

41 

•25.6 

•257 

.258 

•259 

.260 

.261 

.262 

•263 

.264 

•265    1 

42 

.266 

.267 

.268 

.269 

.270 

.271 

.272 

•273 

.274 

.276 

43 

.277 

•     .278 

.279 

.280 

.281 

.282 

•283 

.284 

.285 

.286 

44 

.287 

.288 

.289 

.291 

.292 

•293 

.294 

•295 

.296 

•297 

45 

0.298 

0.300 

0.301 

0.302 

0.303 

0.304 

0.305 

0.306 

0.308 

0.309 

46 

.310 

.311 

.312 

•313 

•3*5 

.316 

.317 

.318 

•319 

.321 

47 

.322 

.323 

•324 

.325 

•327 

.328 

•329 

•330 

•332 

•333 

48 

•334 

•335 

•337 

•338 

•339 

•340 

•342 

•343 

•344 

•345 

49 

•347 

•348 

•349 

•351 

•352 

•353 

•355 

-356 

•357 

•358 

50 

0.360 

0.361 

0.362 

0.364 

0.365 

0.367 

0.368 

0.369 

0.371 

0.372 

51 

•373 

•375 

•376 

•377 

•379 

•380 

.382 

•383 

•384 

.386 

52 

•  387 

•389 

•390 

•392 

•393 

•394 

•396 

•397 

•399 

.400 

53 

.402 

•403 

•405 

.406 

.408 

.409 

.411 

.412 

.414 

•415 

54 

.417 

.418 

.420 

.421 

•423 

•  424 

.426 

.427 

.429 

•  431 

55 

0.432 

0-434 

0-435 

0-437 

0.438 

0.440 

0.442 

0-443 

0.445 

0.446 

56 

•448 

•450 

•451 

•453 

•455 

.456 

.458 

.460 

.461 

.463 

57 

•465 

.466 

.468 

.470 

.471 

-473 

•475 

.476 

•  478 

.480 

58 

.482 

•483 

•485 

.487 

.488 

.490 

•  492 

•494 

•  495 

•497 

59 

•499 

.501 

•  503 

•504 

.506 

.508 

.510 

•  512 

.513 

.515 

60 

0.517 

0.519 

0.521 

0-523 

0.524 

0.526 

0.528 

0.530 

0.532 

0-534 

61 

•536 

•538 

•539 

•541 

•  543 

•545 

•  547 

•549 

•551 

•553 

62 

•555 

•557 

•559 

•561 

•  563 

.565 

•  567 

.569 

•571 

.573 

63 

•575 

•577 

•579 

.581 

•583 

•585 

•587 

.589 

•591 

•593 

64 

•595 

•597 

•599 

.601 

.604 

.606 

.608 

.610 

.612 

.614 

65 

0.616 

0.618 

0.621 

0.623 

0.625 

0.627 

0.629 

0.631 

0.634 

0.6?  6 

66 

.638 

.640 

•643 

•  645 

.647 

.649 

.651 

.654 

.656 

.658 

67 

.661 

•663 

•  665 

.667 

.670 

.672 

•  6/4 

.677 

.679 

.681 

68 

.684 

.686 

.688 

.691 

•693 

.695 

.698 

.700 

•  703 

•  705 

69 

•707 

.710 

.712 

•715 

.717 

.720 

.722 

.725        .727 

•  729 

SMITHSONIAN  TABLES. 


134 


TABLE  4O. 
REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS. 

ENGLISH    MEASURES. 
Pressure    of   Aqueous   Vapor. 


Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

70° 

0.732 

0.734 

0-737 

0-739 

0.742 

0.744 

0.747 

0.750 

0.752 

0-755 

71 

0-757 

0.760 

0.762 

0.765 

0.768 

0.770 

0-773 

0-775 

0.778 

0.781 

72 

0.783 

0.786 

0.789 

0.791 

0-794 

0.797 

0.799 

0.802 

0.805 

0.807 

73 

O.SlO 

0.813 

0.816 

0.818 

0.821 

0.824 

0.827 

0.830 

0.832 

0.835 

74 

0.838 

0.841 

0.843 

0.846 

0.849 

0.852 

0.855 

0.858 

0.861 

0.863 

75 

0.866 

0.869 

0.872 

0.875 

0.878 

0.881 

0.884 

0.887 

0.890 

0.893 

76 

0.896 

0.899 

0.902 

0.905 

0.908 

0.911 

0.914 

0.917 

0.920 

0.923 

77 

0.926 

0.929 

0.932 

0-935 

0.938 

0.941 

0-944 

0.948 

0.951 

0.954 

78 

0-957 

0.960 

0.963 

0.966 

0.970 

0-973 

0.976 

0.979 

0.982 

0.986 

79 

0.989 

0.992 

0-995 

o-999 

1.002 

1.005 

1.009 

1.  012 

I.OI5 

1.019 

80 

81 

1.022 
1.056 

1.025 
1-059 

1.029 
1.063 

1.032 
1.066 

L035 
1.070 

1.039 
1.073 

I.O42 
1.077 

1.046 
I.oSo 

.049 
.084 

.052 

.087 

82 

I.O9I 

1.094 

1.098 

I.  IOI 

I.I05 

1.109 

1.  112 

1.116 

.119 

.123 

83 

I.I27 

I.I30 

I.I34 

1.138 

I.I4I 

I.I45 

I.I49 

1.152 

.156 

.160 

84 

1.163 

1.167 

1.171 

I.I75 

I.I79 

I.I82 

I.I86 

1.190 

.194 

.!98 

85 

1.  201 

1.205 

1.209 

1.213 

I.2I7 

1.  221 

1.225 

1.229 

•233 

.237 

86 

I.24I 

1-245 

1.248 

1.253 

1.256 

1.260 

1.264 

1.269 

•273 

.277 

87 

I.28I 

1-285 

1.289 

1.293 

1.297 

I.30I 

1.305 

1.310 

.3H 

.318 

88 

1.322 

1.326 

!-330 

L335 

1-339 

1-343 

1-347 

1.352 

.356 

.360 

89 

1.364 

1.369 

1-373 

1-377 

1.382 

1.386 

1.390 

1.395 

•399 

.404 

90 

1.408 

I.4I3 

1.417 

1.421 

1.426 

1.430 

1-435 

1.439 

444 

.448 

91 

1-453 

1.458 

1.462 

1.467 

I.47I 

1.476 

1.480 

1.485 

•49° 

-494 

92 

1.499 

1.504 

1.508 

1.513 

I.5I8 

1-523 

1.527 

1-532 

•537 

-542 

93 

1.546 

I.55I 

1.556 

1.561 

1.566 

I-57I 

1.576 

1.580 

-585 

-590 

94 

L595 

1.  600 

1.605 

1.610 

I.6I5 

1.620 

1.625 

1.630 

.635 

.640 

95 

1.645 

1.650 

1.655 

1.660 

1.665 

1.671 

1.676 

1.681 

.686 

.691 

96 

1.696 

1.702 

1.707 

1.712 

I.7I7 

1.723 

1.728 

1-733 

.738 

•744 

97 

1-749 

1-755 

1.760 

1.765 

I.77I 

1.776 

I.78I 

1.787 

-792 

-798 

98 

1.803 

1.809 

1.814 

1.820 

1.825 

1.831 

1.837 

1.842 

.848 

•853 

99 

1-859 

1-865 

1.870 

1.876 

1.882 

1.887 

1.893 

1.899 

1.905 

1.910 

100 

1.916 

1.922 

1.928 

1-934 

1-939 

1-945 

L95I 

1-957 

1.963 

1.969 

IOI 

1-975 

1.981 

1.987 

!-993 

1.999 

2.005 

2.  Oil 

2.017 

2.023 

2.029 

1  02 

2-035 

2.041 

2.047 

2.053 

2.059 

2.066 

2.072 

2.078 

2.084 

2.090 

103 

2.097 

2.103 

2.109 

2.116 

2.122 

2.128 

2.134 

2.141 

2.147 

2.154 

104 

2.160 

2.166 

2.173 

2.179 

2.186 

2.192 

2.199 

2.205 

2.212 

2.219 

105 

2.225 

2.232 

2.238 

2.245 

2.252 

2.258 

2.265 

2.272 

2.278 

2.285 

106 

2.292 

2.299 

2.305 

2.312 

2.319 

2.326 

2.333 

2.340 

2.346 

2-353 

107 

2.360 

2.367 

2.374 

2.381 

2.388 

2-395 

2.4O2 

2.409 

2.416 

2.423 

108 

2.431 

2.438 

2-445 

2.452 

2-459 

2.466 

2.474 

2.481 

2.488 

2-495 

109 

2-503 

2.510 

2.517 

2.525 

2.532 

2-539 

2.547 

2.554 

2.562 

2.569 

110 

2.576 

2.584 

2-591 

2.599 

2.607 

2.614 

2.622 

2.629 

2.637 

2-645 

in 

2.652 

2.660 

2.668 

2.675 

2.683 

2.691 

2.699 

2.706 

2.714 

2.722 

112 

2.730 

2.738 

2.746 

2-754 

2.762 

2.770 

2.777 

2.785 

2-793 

2.801 

H3 

2.810 

2.818 

2.826 

2.834 

2.842 

2.850 

2.858 

2.866 

2.875 

2.883 

114 

2.891 

2.899 

2.908 

2.916 

2.924 

2-933 

2.941 

2-950 

2.958 

2.966 

115 

2-975 

2.983 

2.992 

3.000 

3.009 

3.017 

3.026 

3-035 

3-043 

3.052 

116 

^.061 

3.069 

3.078 

3.087 

3-095 

3.104 

3.H3 

3.122 

3.I3I 

3.140 

117 

3.148 

3.157 

3.166 

3-175 

3.184 

3.193 

3.202 

3.211 

3.220 

3.229 

118 

3-239 

3-248 

3.257 

3.266 

3.275 

3-284 

3.294 

3.303 

3.312 

3-321 

119 

3-331 

3-340 

3-349 

3-359 

3.368 

3.378 

3.387 

3-397 

3.406 

3.416 

SMITHSONIAN  TABLES. 


135 


TABLE    41. 

REDUCTION    OF    PSYCHROMETRIC    OBSERVATIONS. 

ENGLISH     MEASURES. 


Values    of   O.000367  B  (t-t,)(l  +\^=% 


B  =  Barometric  pressure. 

t  =  Temperature  of  the  dry-bulb  thermometer. 
/,  —  Temperature  of  the  wet-bulb  thermometer. 


t-t, 

BAROMETRIC   PRESSURE   IN   INCHES  (B). 

30.5 

30.0 

29.5 

29.0 

23.5 

28.0 

27.5 

27.0 

26.5 

26.0 

25.5 

25.0 

F. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

|0 

O.OII 

O.OII 

O.OII 

O.OII 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

O.OIO 

0.009 

0.009 

2 

.022 

.022 

.022 

.021 

.021 

.021 

.O2O 

.O2O 

.019 

.019 

.019 

.018 

3 

.034 

•033 

•033 

.032 

.031 

.031 

•030 

•OS0 

.029 

.029 

.028 

.028 

4 

.045 

.044 

•043 

•043 

.042 

.041 

.040 

.040 

•039 

.038 

.038 

•037 

5 

0.056 

0.055 

0.054 

0.053 

0.052 

0.052 

0.051 

0.050 

0.049 

0.048 

0.047 

0.046 

6 

.067 

.066 

•065 

.064 

•063 

.062 

.O6l 

.060 

•059 

•057 

.056 

•055 

7 

.079 

.077 

.0/6 

•075 

•073 

.072 

.071 

.070 

.068 

.067 

.066 

.064 

8 

.090 

.088 

.087 

.086 

.084 

•083 

.081 

.080 

.078 

.077 

.0/5 

•0741 

9 

.101 

.099 

.098 

.096 

•095 

•°93 

.091 

.090 

.088 

.086 

.085 

•083 

10 

O.II3 

O.  Ill 

O.IO9 

O.IO7 

0.105 

O.IO3 

0.102 

0.100 

0.098 

0.096 

0.094 

0.092 

ii 

.124 

.122 

.I2O 

.118 

.116 

.114 

.112 

.110 

.108 

.106 

.104 

.102 

12 

•135 

•133 

•131 

.129 

.126 

.124 

.122 

.120 

.118 

•US 

•113 

.III 

13 

.147 

.144 

.142 

.I4O 

•137 

•135 

.132 

.130 

.127 

.125 

.123 

.I2O 

14 

.158 

.156 

•153 

.150 

.148 

•145 

•143 

.140 

.137 

•135 

.132 

•  !3° 

15 

0.170 

0.167 

0.164 

o.  161 

0.158 

0.156 

0.153 

0.150 

0.147 

0.144 

0.142 

0.139 

16 

.I8l 

.178 

•175 

.172 

.I69 

.166 

•I63 

.160 

•  157 

•154 

•151 

.148 

17 

.192 

.I89 

.186 

•  183 

.ISO 

.177 

•173 

.170 

.167 

.164 

.161 

.158 

18 

.204 

.2OO 

.197 

.194 

.190 

.187 

.184 

.180 

.177 

•174 

.170 

.I67 

19 

•215 

.212 

.208 

.205 

.2OI 

.198 

.194 

.191 

.187 

.183 

.180 

.1/6; 

20 

O.227 

0.223 

0.219 

0.216 

0.212 

0.208 

0.204 

0.201 

0.197 

0.193 

0.190 

o.i  86 

21 

.238 

•234 

.230 

.226 

.223 

.219 

•215 

.211 

.207 

•203 

.199 

•J95 

22 

.250 

.246 

.242 

•  237 

•233 

.229 

.225 

.221 

.217 

•213 

.209 

.205  I 

23 

.261 

•257 

•253 

.248 

•244 

.240 

.236 

.231 

.227 

.223 

.218 

.214 

24 

•273 

.268 

.264 

•259 

•255 

.250 

.246 

.241 

•237 

•233 

.228 

.224 

25 

0.284 

0.280 

0275 

0.270 

0.266 

O.26l 

0.256 

0.252 

0.247 

0.242 

0.238 

0-233 

26 

.296 

.291 

.286 

.281 

•2/7 

.272 

.267 

.262 

.257 

.252 

.247 

•243; 

27 

.307 

.302 

.297 

.292 

.287 

.282 

.277 

.272 

.267 

.262 

•  257 

.252 

28 

•319 

•314 

.309 

•303 

.298 

•293 

.288 

.282 

.277 

.272 

.267 

.261 

29 

•331 

.325 

.320 

•  3M 

•3°9 

.304 

.298 

•293 

.287 

.282 

.2/6 

.271 

30 

0.342 

0-337 

0.331 

0.325 

O.32O 

0.314 

0.309 

0.303 

0.297 

0.292 

0.286 

0.281 

31 

•  354 

.348 

•342 

•336 

•331 

•325 

•319 

•313 

•307 

.302 

.296 

.290 

32 

.365 

•359 

•354 

•348 

•342 

•336 

•330 

.324 

.318 

.312 

.306 

.300; 

33 

•377 

•  371 

•  365 

•359 

•352 

•346 

•340 

•334 

.328 

•322 

•315 

•309 

!    34 

-389 

•  382 

•376 

•  3/0 

.363 

•357 

•351 

•344 

.338 

•331 

•325 

•3*9 

35 

0.401 

0-394 

0.387 

0.381 

0-374 

0.368 

0.361 

0-355 

0.348 

0.341 

0-335 

0.328  : 

!     36 

.412 

•405 

•399 

•392 

•  385 

•  3/8 

•372 

•365 

.358 

•351 

•345 

•338 

1     37 

.424 

.417 

.410 

•403 

.396 

•389 

.382 

•375 

.368 

•  361 

•354 

•  347 

'     38 

•436 

.428 

.421 

.414 

.407 

.400 

•393 

•386 

•379 

•371 

•  364 

•  357  i 

39 

•447 

.440 

•433 

•425 

.418 

.411 

•403 

•396 

•389 

.381 

•374 

.367 

40 

0-459 

0.452 

0-444 

0-437 

0.429 

0.422 

0.414 

0.406 

0-399 

0.391 

0.384 

0.376 

SMITHSONIAN  TABLES. 


136 


TABLE  41, 
REDUCTION     OF    PSYCHROMETRIC    OBSERVATIONS 

ENGLISH    MEASURES. 
Values    of   0.000367  B  (t-t,)(l+  f^yj)- 

B  —  Barometric  pressure. 

t  =  Temperature  of  the  dry-bulb  thermometer. 
t)  =  Temperature  of  the  wet-bulb  thermometer. 


t-t, 

BAROMETRIC   PRESSURE  IN  INCHES   (£). 

24.5 

24.0 

235 

23.0 

22.5 

22.0 

21.5 

21.0 

20.5 

20.0 

19  5 

19.0 

18.5 

F. 

loch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

Inch. 

1° 

1.009 

0.009 

0.009 

0.008 

0.008 

0.008 

0.008 

0.008 

0.008 

0.007 

0.007 

0.007 

0.007 

2 

.018 

.018 

.017 

.017 

.016 

.016 

,0l6 

.015 

.015 

•015 

.014 

.014 

.014 

3 

.027 

.026 

.026 

.025 

•025 

.024 

.024 

.023 

.023 

.022 

.O2I 

.021 

.O2O 

4 

.036 

•P35 

•035 

•034 

•033 

.032 

•032 

.031 

.030 

.029 

.029 

.028 

.027 

5 

0.045 

0.044 

0.043 

0.042 

0.041 

0.040 

0.040 

0.039 

0.038 

0.037 

0.036 

0-035 

0.034 

6 

•054 

•053 

.052 

.051 

.050 

.049 

.048 

.046 

•045 

.044 

•043 

.042 

.041 

7 

•063 

.062 

.061 

•059 

.058 

•057 

•055 

•054 

•053 

.052 

.050 

•049 

.048 

8 

.072 

.071 

.070 

.068 

.066 

.065 

.063 

.062 

.060 

•059 

•057 

.056 

•055 

9 

.081 

.080 

.078 

.076 

•075 

•073 

.071 

.070 

.068 

.066 

.064 

.063 

.061 

10 

0.090 

0.089 

0.087 

0.085 

0.083 

O.oSl 

0.079 

0.077 

0.076 

0.074 

0.072 

0.070 

0.068 

ii 

.100 

.097 

•095 

•093 

.091 

.089 

.087 

•085 

.083 

.081 

.079 

.077 

•075 

12 

.109 

.106 

.104 

.IO2 

.100 

.097 

•095 

•093 

.091 

.089 

.086 

.084 

.082 

13 

.118 

•US 

•113 

.no 

.108 

.106 

.103 

.101 

.098 

.096 

•093 

.091 

.089 

14 

.127 

.124 

.122 

.II9 

.117 

.114 

.III 

.109 

.106 

.104 

.IOI 

.098 

•095 

15 

0.136 

o.i33 

O.I3I 

0.128 

0.125 

O.I22 

0.119 

0.117 

O.II4 

O.III 

0.108 

0.105 

0.102 

16 

•145 

.142 

•139 

.136 

•133 

.130 

.127 

.124 

.121 

.118 

.116 

•113 

.110 

17 

•155 

•151 

.148 

•MS 

.142 

•139 

•135 

.132 

.129 

.126 

.123 

.I2O 

.117 

18 

.164 

.160 

•157 

•154 

.151 

.147 

•143 

.140 

•137 

•134 

.130 

.127 

.124 

19 

•173 

.169 

.166 

.162 

•159 

•155 

•152 

.148 

.144 

.141 

•137 

•134 

•J3i 

20 

0.182 

0.178 

0.175 

O.I7I 

0.167 

0.163 

o.i  60 

0.156 

0.152 

0.148 

0.144 

O.I4I 

0.137 

21 

.191 

.187 

.183 

.180 

.176 

.172 

.168 

.164 

.160 

.156 

.152 

.148 

.144 

22 

.201 

.196 

.192 

.188 

.184 

.ISO 

.176 

.172 

.168 

.164 

.160 

•155 

•151 

23 

.210 

.205 

.2OI 

.197 

•193 

.188 

.184 

.180 

•175 

.171 

.167 

.163 

.158 

24 

.-19 

.214 

.2IO 

.205- 

.201 

.196 

.192 

.188 

•I83 

.179 

.174 

.170 

.165 

25 

0.228 

0.223 

0.2T9 

0.214 

0.210 

0.205 

O.2OO 

0.196 

O.I9I 

0.186 

O.lSl 

0.177 

0.172 

26 

.238 

•233 

.228 

.223 

.218 

•213 

.208 

.203 

.199 

.194 

.I89 

.184 

.179 

27 

.247 

.242 

•237 

.232 

.227 

.222 

.216 

.211 

.206 

.201 

.196 

.191 

.186 

28 

.256 

•251 

•245 

.240 

•235 

.230 

•225 

.219 

.214 

.209 

.203 

.198 

•193 

29 

.266 

.260 

•254 

.249 

.244 

.238 

•233 

.227 

.222 

.216 

.211 

.206 

.200 

30 

0.275 

0.269 

0.263 

0.258 

0.252 

0.247 

O.24I 

0.235 

O.23O 

0.224 

0.218 

0.213 

0.207 

3i 

.284 

.278 

.272 

.267 

.261^ 

•255 

•249 

•243 

.238 

.232 

.226 

.220 

.214 

32 

•294 

.287 

.281 

•'275 

.269* 

.263 

•257 

.251 

•245 

•239 

•233 

.227 

.221 

33 

•303 

.296 

.290 

.284 

.278 

.272 

.266 

•259 

•253 

.247 

.241 

•235 

.229 

34 

.312 

.306 

.299 

•293 

.286 

.280 

.274 

.267 

.261 

•255 

.248 

.242 

.236 

35 

0.322 

0-315 

0.308 

0.302 

0.295 

0.289 

0.282 

0.275 

0.268 

0.262 

0.255 

0.249 

0.243 

36 

•33  1 

•324 

•317 

•311 

•304 

.297 

.290 

.284 

.277 

.270 

•263 

•257 

.250 

37 

•341 

•333 

.326 

•319 

.312 

•305 

•299 

.292 

.285 

.278 

.271 

.264 

•257 

38 

•350 

•342 

•335 

.328 

.321 

•314 

.307 

.300 

•293 

.285 

.278 

.271 

.264 

39 

•359 

•352 

•344 

•337 

•330 

.322 

•315 

.308 

.300 

•293 

.285 

.278 

.271 

40 

0.369 

0.361 

0-353 

0.346 

0.338 

0-33* 

0.323 

0.316 

0.308 

0.301 

0.293 

0.286 

0.278 

SMITHSONIAN  TABLES. 


137 


TABLE  42. 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 

em- 
pera- 
ture. 

t. 

DEPRESSION  OF  THE  DEW-POINT  (t—d}. 

0° 

0?5 

A 

M 

2?0 

2?5 

3?0 

3?5 

4?0 

4?5 

5?0 

5?5 

6?0 

6?5 

7?0 

7?5 

F. 

-32° 

IOO 

97 

94 

92 

89 

-28 

IOO 

97 

94 

92 

89 

86 

83 

81 

78 

75 

73 

71 

69 

67 

65 

63 

-24 

IOO 

97 

94 

92 

89 

87 

84 

81 

79 

76 

74 

72 

70 

67 

65 

63 

-20 

IOO 

97 

94 

92 

89 

87 

84 

82 

79 

77 

75 

73 

7i 

69 

66 

65 

-16 

IOO 

97 

94 

92 

90 

87 

85 

82 

80 

78 

75 

73 

71 

69 

67 

65 

—  12 

IOO 

97 

95 

Q2 

90 

87 

85 

82 

80 

78 

75 

73 

71 

69 

67 

65 

-  8 

IOO 

97 

95 

92 

90 

87 

85 

83 

So 

78 

76 

74 

72 

70 

68 

66 

-  4 

IOO 

97 

95 

92 

90 

87 

85 

83 

So 

78 

76 

74 

72 

70 

68 

66 

0 

IOO 

97 

95 

92 

9° 

87 

85 

83 

80 

78 

76 

74 

72 

70 

68 

66 

+  4 

IOO 

98 

95 

93 

90 

88 

86 

84 

82 

80 

78 

76 

74 

70 

68 

8 

IOO 

98 

95 

93 

90 

88 

86 

84 

82 

80 

78 

76 

74 

72 

69 

12 

IOO 

98 

95 

93 

9° 

88 

86 

84 

82 

So 

78 

76 

74 

72 

71 

69 

16 

IOO 

98 

95 

93 

89 

86 

84 

82 

80 

78 

76 

74 

72 

7i 

69 

20 

IOO 

98 

95 

93 

91 

89 

87 

85 

83 

81 

79 

77 

75 

73 

72 

70 

24 

IOO 

98 

95 

93 

91 

89 

87 

85 

83 

Si 

79 

77 

75 

73 

72 

70 

28 

IOO 

98 

95 

93 

91 

89 

87 

85 

83 

Si 

79 

77 

76 

74 

72 

70 

32 

IOO 

98 

96 

94 

92 

90 

87 

85 

83 

81 

79 

78 

76 

74 

72 

71 

36 

IOO 

98 

96 

94 

92 

89 

87 

85 

83 

Si 

80 

78 

76 

74 

73 

40 

IOO 

98 

96 

94 

93 

9i 

89 

87 

86 

84 

82 

Si 

79 

78 

76 

74 

44 

IOO 

98 

96 

94 

93 

91 

89 

87 

86 

84 

83 

81 

79 

78 

76 

75 

48 

IOO 

98 

96 

95 

93 

91 

89 

88 

86 

84 

83 

81 

80 

78 

77 

75 

52 

IOO 

98 

96 

95 

93 

91 

89 

88 

86 

85 

83 

82 

80 

79 

77 

76 

56 

IOO 

98 

96 

95 

93 

9° 

88 

86 

85 

83 

82 

80 

79 

77 

76 

60 

IOO 

98 

97 

95 

93 

91 

90 

88 

87 

85 

84 

82 

81 

79 

78 

76 

64 

IOO 

98 

97 

95 

93 

92 

9° 

88 

87 

85 

84 

82 

81 

79 

78 

77 

68 

IOO 

98 

97 

95 

93 

92 

9° 

89 

87 

86 

84 

83 

81 

80 

78 

77 

72 

IOO 

98 

97 

95 

93 

92 

90 

89 

87 

86 

84 

83 

8l 

80 

79 

77 

76 

IOO 

98 

97 

95 

94 

92 

90 

89 

87 

86 

85 

83 

82 

80 

79 

77 

80 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

86 

85 

83 

82 

81 

79 

78 

84 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

86 

85 

84 

82 

81 

80 

78 

88 

IOO 

98 

97 

95 

94 

92 

91 

89 

88 

87 

85 

84 

83 

81 

80 

79 

92 

IOO 

98 

97 

95 

94 

92 

91 

90 

88 

87 

85 

84 

83 

81 

80 

79 

96 

IOO 

98 

97 

95 

94 

93 

91 

90 

88 

87 

86 

84 

83 

82 

80 

79 

IOO 

IOO 

99 

97 

96 

94 

93 

91 

90 

89 

-87 

86 

85 

83 

82 

81 

79 

104 

IOO 

99 

97 

94 

93 

9° 

89 

87 

86 

85 

83 

82 

81 

80 

108 

112 

116 

IOO 
IOO 
IOO 

99 
99 

99 

97 
97 
97 

96 
96 
96 

94 
94 
94 

93 
93 
93 

92 
92 
92 

90 
90 
90 

89 
89 
89 

88 
88 
88 

86 
86 
87 

000000 
Cn  Cn  Oi 

84 
84 
84 

04  cO  CO 

COCO  CO 

81 
82 
82 

So 
80 
81 

120 

IOO 

99 

97 

96 

95 

93 

92 

* 

89 

88 

87 

86 

84 

83 

82 

81 

SMITHSONIAN  TABLES. 


138 


TABLE   42 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


Air 
Temper- 
ature. 
/. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d}. 

8?0 

8?5 

9?0 

9?5 

I0?0 

I0?5 

11:0 

ll?5 

I2?0 

I2?5 

I3?0 

I3?5 

I4?0 

I4?5 

I5?0 

F. 

-24° 

61 

60 

58 

56 

55 

53 

5i 

50 

49 

-20 

62 

61 

59 

57 

55 

53 

52 

50 

49 

47 

46 

45 

43 

42 

4i 

-16 

63 

61 

59 

58 

56 

54 

53 

5i 

49 

48 

46 

45 

44 

42 

4i 

—  12 

63 

61 

60 

58 

56 

55 

53 

52 

50 

49 

47 

46 

45 

43 

42 

-  8 

64 

62 

61 

59 

57 

56 

54 

52 

5i 

49 

48 

47 

45 

44 

43 

—  4 

65 

63 

61 

60 

58 

56 

55 

53 

52 

50 

49 

47 

46 

45 

43 

0 

65 

63 

61 

60 

58 

57 

55 

53 

52 

51 

49 

48 

47 

45 

44 

+  4 

66 

64 

62 

61 

59 

57 

56 

54 

52 

5i 

50 

49 

48 

46 

45 

.8 

67 

65 

64 

62 

60 

59 

57 

55 

54 

52 

5i 

50 

48 

47 

46 

12 

67 

65 

64 

62 

61 

59 

58 

56 

55 

53 

52 

5i 

49 

48 

47 

16 

67 

65 

64 

62 

61 

60 

58 

56 

55 

54 

52 

5i 

50 

49 

47 

20 

68 

66 

65 

63 

61 

60 

58 

57 

56 

54 

53 

5i 

50 

49 

48 

24 

68 

67 

65 

64 

62 

61 

59 

58 

56 

55 

54 

52 

5i 

50 

48 

28 

69 

67 

65 

64 

62 

61 

59 

58 

57 

55 

54 

53 

52 

50 

49 

32 

69 

68 

66 

64 

63 

61 

60 

58 

57 

56 

54 

53 

52 

5i 

50 

36 

7i 

69 

68 

66 

65 

63 

62 

60 

59 

58 

56 

55 

54 

52 

5i 

40 

73 

7i 

70 

68 

67 

65 

64 

62 

61 

59 

58 

57 

55 

54 

53 

44 

73 

72 

7i 

69 

68 

66 

65 

64 

63 

61 

60 

58 

57 

56 

55 

48 

74 

72 

7i 

70 

68 

67 

66 

64 

63 

62 

61 

59 

58 

57 

56 

52 

74 

73 

7i 

70 

69 

67 

66 

65 

64 

62 

61 

60 

59 

58 

57 

56 

75 

73 

72 

70 

69 

68 

67 

65 

64 

63 

62 

61 

59 

58 

57 

60 

75 

74 

72 

7i 

70 

68 

67 

66 

65 

63 

62 

61 

60 

59 

58 

64 

75 

74 

73 

7i 

70 

69 

68 

66 

65 

64 

63 

62 

60 

59 

58 

68 

76 

74 

73 

72 

70 

69 

68 

67 

66 

64 

63 

62 

61 

60 

59 

72 

76 

75 

73 

72 

71 

70 

68 

67 

66 

65 

64 

63 

61 

60 

59 

76 

76 

75 

74 

72 

7i 

70 

69 

68 

66 

65 

64 

63 

62 

61 

60 

80 

77 

75 

74 

73 

72 

70 

69 

68 

67 

66 

65 

64 

62 

61 

60 

84 

77 

76 

74 

73 

72 

7i 

70 

68 

67 

66 

65 

64 

63 

62 

61 

88 

77 

76 

75 

74 

72 

7i 

70 

69 

68 

67 

66 

64 

63 

62 

61 

92 

78 

76 

75 

74 

73 

72 

70 

69 

68  ' 

67 

66 

65 

64 

63 

62 

96 

78 

77 

75 

74 

73 

72 

7i 

70 

69 

67 

66 

65 

64 

63 

62 

100 

78 

77 

76 

75 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

63 

104 

79 

77 

76 

75 

74 

73 

72 

70 

69 

68 

67 

66 

65 

64 

63 

1  08 

79 

78 

76 

75 

74 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

112 

79 

78 

77 

76 

75 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

64 

116 

79 

78 

77 

76 

75 

74 

73 

72 

7i 

70 

69 

67 

66 

65 

65 

120 

80 

79 

77 

76 

75 

74 

73 

72 

7i 

70 

69 

68 

67 

66 

65 

SMITHSONIAN  TABLES. 


139 


TABLE  42. 


RELATIVE    HUMIDITY. 

TEMPERATURES'  FAHRENHEIT. 


Air 
Temper- 
ature. 
t. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d}. 

15° 

16° 

17° 

18° 

19° 

20° 

2|o 

22° 

23° 

24° 

25° 

26° 

27° 

28° 

29° 

30° 

F. 

-20° 

4i 

39 

-16 

4i 

39 

36 

34 

32 

3i 

29 

—  12 

42 

39 

37 

35 

33 

3i 

29 

27 

26 

24 

23 

22 

21 

-  8 

43 

40 

38 

36 

34 

32 

30 

28 

26 

25 

23 

22 

21 

20 

19 

18 

4 

43 

4i 

39 

36 

34 

32 

3i 

29 

27 

25 

24 

23 

21 

20 

19 

18 

0 

44 

42 

39 

37 

35 

33 

3i 

29 

28 

26 

25 

23 

22 

21 

19 

18 

+  4 

45 

43 

40 

38 

36 

34 

32 

30 

29 

27 

25 

24 

23 

21 

20 

19 

8 

46 

43 

4i 

39 

37 

35 

33 

3i 

30 

28 

26 

25 

23 

22 

21 

20 

12 

47 

44 

42 

39 

37 

35 

34 

32 

30 

28 

27 

25 

24 

23 

21 

20 

16 

47 

45 

43 

40 

38 

36 

34 

32 

3i 

29 

28 

26 

25 

23 

22 

21 

20 

48 

46 

43 

4i 

39 

37 

35 

33 

32 

30 

28 

27 

25 

24 

23 

22 

24 

48 

46 

44 

42 

40 

38 

36 

34 

32 

3i 

29 

28 

26 

25 

23 

22 

28 

49 

47 

44 

42 

40 

38 

36 

34 

33 

3i 

30 

28 

27 

26 

24 

23 

32 

50 

47 

45 

43 

4i 

39 

37 

35 

33 

32 

30 

29 

27 

26 

25 

24 

36 

5i 

49 

46 

44 

42 

40 

38 

37 

35 

33 

32 

30 

28 

27 

26 

25 

40 

53 

50 

48 

46 

44 

42 

40 

38 

36 

34 

33 

31 

30 

28 

27 

26 

44 

55 

52 

50 

48 

45 

43 

4i 

39 

38 

36 

34 

32 

31 

30 

28 

27 

48 

56 

54 

5i 

49 

47 

45 

43 

4i 

39 

37 

35 

34 

32 

31 

29 

28 

52 

57 

54 

52 

50 

48 

46 

44 

42 

4i 

39 

37 

35 

34 

32 

31 

29 

56 

57 

55 

53 

5i 

49 

47 

45 

43 

42 

40 

38 

37 

35 

33 

32 

30 

60 

58 

56 

54 

5* 

50 

48 

46 

44 

42 

4i 

39 

38 

36 

35 

33 

32 

64 

58 

56 

54 

52 

50 

48 

46 

45 

43 

4i 

40 

38 

37 

35 

34 

33 

68 

59 

57 

55 

53 

5i 

49 

47 

45 

44 

42 

40 

39 

37 

36 

35 

33 

72 

59 

57 

55 

53 

5i 

49 

48 

46 

44 

43 

4i 

40 

38 

37 

35 

34 

76 

60 

58 

56 

54 

52 

50 

48 

47 

45 

43 

42 

40 

39 

37 

36 

35 

80 

60 

58 

56 

54 

52 

5i 

49 

47 

45 

44 

42 

4i 

39 

38 

37 

35 

84 

61 

59 

57 

55 

53 

5i 

49 

48 

46 

44 

43 

4i 

40 

39 

37 

36 

88 

61 

59 

57 

55 

54 

52 

50 

48 

47 

45 

43 

42 

4i 

39 

38 

36 

92 

62 

60 

58 

56 

54 

52 

5i 

49 

47 

46 

44 

43 

4i 

40 

38 

37 

96 

62 

60 

58 

56 

55 

53 

5i 

49 

48 

46 

45 

43 

42 

40 

39 

38 

100 

63 

61 

59 

57 

55 

53 

52 

50 

48 

47 

45 

44 

42 

4i 

40 

38 

JC4 

63 

61 

59 

57 

56 

54 

52 

50 

49 

47 

46 

44 

43 

4i 

40 

39 

108 

64 

02 

60 

58 

56 

54 

53 

5i 

49 

48 

46 

45 

43 

42 

4i 

39 

112 

64 

62 

60 

58 

57 

55 

53 

52 

50 

48 

47 

45 

44 

43 

4i 

40 

116 

65 

63 

61 

59 

57 

55 

54 

52 

5i 

49 

48 

46 

45 

43 

42 

4i 

120 

65 

63 

61 

59 

58 

56 

54 

53 

5i 

50 

48 

47 

45 

44 

42 

4i 

SMITHSONIAN  TABLES. 


I4O 


TABLE    42. 


RELATIVE    HUMIDITY. 

TEMPERATURES    FAHRENHEIT. 


(  Air 
Temper 

ature, 

t. 

DEPRESSION  OF  THE  DEW-POINT  (t  —  d].' 

33° 

36° 

39° 

42° 

45° 

48° 

51° 

54° 

57° 

60° 

63° 

66° 

69° 

72° 

75° 

F. 

-4 

15 

13 

0 

15 

13 

ii 

+  4 

16 

13 

ii 

9 

8 

8 

17 

14 

ii 

10 

8 

7 

12 

17 

14 

12 

10 

8 

7 

6 

16 

18 

15 

12 

IO 

9 

7 

6 

5 

4 

20 

18 

15 

J3 

II 

9 

8 

6 

5 

4 

4 

24 

19 

16 

14 

II 

10 

8 

7 

6 

5 

4 

3 

28 

19 

16 

14 

12 

IO 

8 

7 

6 

5 

4 

3 

3 

32 

20 

17 

14 

12 

10 

9 

7 

6 

5 

4 

4 

3 

3 

2 

36 

21 

18 

15 

13 

II 

9 

8 

7 

6 

5 

4 

3 

3 

2 

2 

40 

22 

19 

16 

14 

12 

10 

9 

7 

6 

5 

4 

4 

3 

2 

2 

44 

23 

20 

17 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

3 

3 

2 

48 

24 

21 

18 

15 

13 

ii 

10 

8 

7 

6 

5 

4 

4 

3 

2 

52 

25 

22 

19 

16 

14 

12 

10 

9 

8 

6 

5 

5 

4 

3 

3 

56 

26 

23 

20 

17 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

4 

3 

60 

28 

24 

21 

18 

16 

13 

12 

IO 

9 

7 

6 

5 

5 

4 

3 

64 

29 

25 

22 

19 

16 

14 

12 

ii 

9 

8 

7 

6 

5 

4 

4 

68 

30 

26 

23 

20 

17 

15 

13 

ii 

10 

8 

7 

6 

5 

5 

4 

72 

30 

27 

24 

21 

18 

16 

14 

12 

IO 

9 

8 

7 

6 

5 

4 

76 

31 

28 

24 

22 

19 

17 

15 

13 

ii 

9 

8 

7 

6 

5 

4 

80 

31 

28 

25 

22 

20 

18 

15 

13 

12 

10 

9 

8 

7 

6 

5 

84 

32 

29 

26 

23 

20 

18 

16 

14 

12 

ii 

9 

8 

7 

6 

5 

88 

33 

29 

26 

23 

21 

J9 

17 

15 

13 

ii 

IO 

9 

8 

7 

6 

92 

33 

30 

27 

24 

21 

19 

17 

15 

14 

12 

10 

9 

8 

7 

6 

96 

34 

30 

27 

25 

22 

20 

18 

16 

14 

12 

ii 

10 

8 

7 

6 

100 

34 

31 

28 

25 

23 

20 

18 

16 

14 

13 

ii 

10 

9 

8 

7 

104 

35 

32 

29 

26 

23 

21 

19 

17 

15 

13 

12 

II 

9 

8 

7 

1  08 

36 

32 

29 

26 

24 

21 

19 

17 

15 

14 

12 

II 

10 

9 

8 

112 

36 

33 

30 

27 

24 

22 

20 

18 

16 

14 

13 

II 

10 

9 

8 

116 

37 

33 

30 

27 

25 

22 

2O 

18 

16 

15 

13 

12 

ii 

9 

8 

120 

37 

34 

31 

28 

25 

23 

21 

19 

17 

15 

14 

12 

ii 

10 

9 

SMITHSONIAN  TABLES. 


141 


TABLE  43. 

REDUCTION 


(Below  o( 


OF  PSYCHROMETRIC  OBSERVATIONS. 

METRIC  MEASURES. 
Pressure  of  Aqueous  Vapor. 

Vapor  over  ice— Marvin. )  (Above  o° ,  Vapor  over  water — Brock. ) 


Tempera- 
ture. 

0° 

1°           2° 

3° 

4° 

5° 

6° 

7° 

8°           9° 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm.          mm. 

—  30° 

0.28 

0.26 

0.23 

0.  ?I 

0.18 

o.  16 

o  15 

0.13 

0.12 

O.  II 

—  20 

0.78 

0.71 

0.64 

0.58 

0.53 

0.48 

0.43 

0-39 

0-35 

0.32 

—  10 

I.96 

1.79 

1.64 

1.49 

1-36 

1-25 

1.14 

1.04 

0-95 

0.86 

0 

4-57 

4.21 

3.87 

3-56 

3-28 

3.01 

2.76 

2-53 

2-33 

2.14 

Tempera- 
ture. 

0?0 

0?l 

0?2 

0?3 

0?4 

0?5 

0?6 

0?7 

0?8 

0?9 

C. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

+  0° 

4-57 

4.60 

4.64 

4.67 

4.70 

4-74 

4-77 

4.80 

4.84 

4-87    ! 

i 

4.91 

4-94 

4.98 

5.02 

5.05 

5.09 

5-12 

5-l6 

5-20 

5.23 

2 

5-27 

5.3i 

5-35 

5-39 

5.42 

546 

5.50 

5-54 

5.58 

5-62 

3 

5.66 

5.70 

5-74 

5-78 

5-82 

5-86 

5-9° 

5-94 

5-99 

6.03 

4 

6.07 

6.11 

6.15 

6.  20 

6.24 

6.28 

6-33 

6.37 

6.42 

6.46 

5 

6.51 

6.55 

6.60 

6.64 

6.69 

6-74 

6.78 

6.83 

6.88 

6.92 

6 

6.97 

7.02 

7,07 

7.12 

7.17 

7.22 

7.26 

7-31 

7.36 

7.42 

7 

7-47 

7-52 

7.57 

7-62 

7.67 

7.72 

7.78 

7.83 

7.88 

7-94 

8 

7-99 

8.05 

8.10 

8.15 

8.21 

8.27 

8.32 

8.38 

8-43 

8-49 

9 

8-55 

8.61 

8.66 

8.72 

8.78 

8.84 

8.90 

8.96 

9.02 

9.08 

10 

9.14 

9.20 

9.26 

9-32 

9.39 

9-45 

9-51 

9.58 

9.64 

9.70 

ii 

9-77 

9-83 

9.90 

9.96 

10.03 

10.09 

10.  16 

10.23 

10.30 

10.36 

12 

10.43 

10.50 

10.57 

10.64 

10.71 

10.78 

10.85 

10.92 

10.99 

11.07 

J3 

11.14 

II.  21 

11.28 

11.36 

11.43 

11.50 

11.58 

11.66 

n-73 

11.  Si 

14 

u.88 

11.96 

12.04 

12.12 

12.19 

12.27 

12.35 

12.43 

12.51 

12.59 

15 

12.67 

12.76 

12.84 

12.92 

13.00 

13.09 

13-17 

13.25 

13-34 

13.42 

16 

13-51 

13.60 

13.68 

I3.77 

13.86 

13.95 

14.04 

14.12 

14.21 

14.30 

17 

14.40 

14.49 

14.58 

14.67 

14.76 

14.86 

14.95 

15.04 

I5.H 

15-23 

18 

15.33 

15-43 

15.52 

15.62 

15.72 

15-82 

15-92 

16.02 

16.12 

16.22 

19 

16.32 

16.42 

16.52 

16.63 

16.73 

16.83 

16.94 

17.04 

17-15 

17.26 

20 

17-36 

1747 

17-58 

17.69 

17.80 

17.91 

18.02 

18.13 

18.24 

18.35 

21 

18.47 

18.58 

18.69 

18.81 

18.92 

19.04 

19.16 

19.27 

19.39 

19-51 

22 

19.63 

19-75 

19.87 

19.99 

20.11 

20.24 

20.36 

20.48 

20.61 

20.73 

23 

20.86 

20.98 

21.  II 

21.24 

21-37 

21.50 

21.63 

21.76 

21.89 

22.02 

24 

22.15 

22.29 

22.42 

22.55 

22.69 

22.83 

22.96 

23.10 

23.24 

23.38 

25 

23.52 

23.66 

23.80 

23-94 

24.08 

24.23 

24-37 

24-52 

24.66 

24.81 

26 

24.96 

25.10 

25.25 

25.40 

25-55 

25.70 

25.86 

26.01 

26.16 

26.32 

27 

26.47 

26.63 

26.78 

26.94 

27.10 

27.26 

27.42 

27.58 

27.74 

27.90 

28 

28.07 

28.23 

28.39 

28.56 

28.73 

28.89 

29.06 

29.23 

29.40 

29-57 

29 

29.74 

29.92 

30.09 

30.26 

30.44 

30.62 

30.79 

30.97 

3I.I5 

31-33 

30 

31.51 

3L69 

31.87 

32.06 

32.24 

32.43 

32.61 

32.80 

32.99 

33-18 

3i 

33-37 

33.56 

33-75 

33-94 

34-14 

34-33 

34-53 

34-72 

34.92 

35-12 

32 

35.32 

35.52 

35.72 

35.92 

36.13 

36.33 

36.54 

36.74 

36.95 

37.16 

33 

37-37 

37.58 

37-79 

38.00 

38.22 

38.43 

38.65 

38.87 

39.08 

39-30 

34 

39-52 

39-74 

39-97 

40.19 

40.41 

40.64 

40.87 

41.09 

41.32 

41-55 

35 

41.78 

42.02 

42.25 

42.48 

42.72 

42.96 

43.19 

43-43 

43.67 

43.92 

36 

44.16 

44.40 

44.65 

44.89 

45.14 

45-39 

45.64 

45-89 

46.14 

46.39 

37 

46.65 

46.90 

47.16 

47.42 

47-68 

47-94 

48.20 

48.46 

48.73 

48.99 

38 

49-26 

49-53 

49.80 

50.07 

50.34 

50.61 

50.89 

51.16 

5L44 

5L72 

39 

52.00 

52.28 

52.56 

52.84 

53.13 

53-41 

53.70 

53-99 

54-28 

54-57 

40 

54.87 

55.i6 

55.46 

55-75 

56.05 

56.35 

56.65 

56.95 

57.26 

57.56 

4i 

57.87 

58.18 

58.49 

58.80 

59-  ii 

59-43 

59-74 

60.06 

60.38 

60.70 

42 

61.02 

6i.34 

61.66 

61.99 

62.32 

62.65 

62.98 

63-31 

63.64 

63.97 

43 

64.31 

64.65 

64.99 

65.33 

65-67 

66.01 

66.36 

66.71 

67-05 

67.41 

44 

67.76 

68.ii 

68.47 

68.82 

69.18 

69.54 

69.90 

70.26 

70.63 

70.99 

45 

71.36 

71.73 

72.10 

72.48 

72.85 

73.23 

73.60 

73.98 

74.36 

74.75 

SMITHSONIAN  TABLES. 


142 


TABLE 

REDUCTION     OF    PSYCHROMETRIC    OBSERVATIONS. 

METRIC    MEASURES. 
Values  of   O.OO066O  B  (t-t,)(l  +^3)' 

t  =  Temperature  of  the  dry-bulb  thermometer. 
^  =  Temperature  of  the  wet-bulb  thermometer. 


/       / 

BAROMETRIC    PRESSURE    IN    MILLIMETRES    (B}. 

1     t\ 

770 

760 

750 

740 

730 

720 

710 

700 

690 

680 

670 

660 

650 

640 

630 

c. 

rani. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

JO 

0.52 

0.5  r 

0.50 

0.50 

0.49 

0.48 

0.48 

0.47 

0.46 

0.46 

045 

0.44 

0.44 

043 

0.42 

2 

1.03 

I.OI 

1.  00 

0.98 

0.97 

0.96 

0.94 

0.93 

0.92 

0.90 

0.89 

0.88 

0.87 

0.85 

0.84 

3 

1-54 

1.52 

1.49 

1.47 

1-45 

143 

I.4I 

1-39 

1.37 

1-35 

1.33 

1.32 

1.30 

1.28 

1.26 

4 

2.04 

2.02 

1.99 

1.97 

1.94 

1.91 

1.89 

1.86 

1.83 

1.81 

I.78 

1-75 

1.73 

1.70 

1.67 

5 

2.56 

2.52 

2.49 

2.46 

243 

2-39 

2.36 

2.32 

2.29 

2.26 

2.23 

2.19 

2.17 

2.13 

2.09 

6 

3-07 

3-03 

2.99 

2-95 

2.91 

2.87 

2.83 

2.79 

2-75 

2.71 

2.67 

2.63 

2.59 

2-55 

2.51 

7 

3-59 

3-54 

3.50 

345 

340 

3.36 

3.31 

3-26 

3.22 

3-17 

3.12 

3.08 

3-04 

2-99 

2.94 

8 

4.11 

4-05 

4.00 

3-95 

3.89 

3.84 

3-79 

3-73 

3.68 

3.63 

3-58 

3-53 

348 

342 

3.36 

9 

4.62 

4.56 

4.50 

444 

4.38 

4-32 

4.27 

4.21 

4-15 

4.09 

4.03 

3-97 

3-91 

3.85 

3-79 

10 

5-15 

5-o8 

5.01 

4-94 

4.88 

4.81 

4-74 

4.68 

4.61 

4-54 

447 

4.41 

4-35 

4.28 

4.21 

ii 

5-66 

5-59 

5.51 

544 

5-37 

5-30 

5.22 

5.15 

5.08 

5.00 

4-93 

4.86 

4.79 

4.71 

4.63 

12 

6.19 

6.ii 

6.  02 

5.94 

5-86 

578 

5-70 

5-62 

5-54 

546 

5.38 

5-30 

5-22 

5.14 

5.06 

13 

6.71 

6.62 

6-53 

6-45 

6.36 

6.27 

6.18 

6.10 

6.01 

5-92 

5.83 

5-75 

5-66 

5-57 

549 

14 

7-23 

7.14 

7.05 

6-95 

6.86 

6.76 

6.67 

6.58 

6.48 

6.39 

6.29 

6.20 

6.ii 

6.01 

5-92 

15 

7.76 

7.66 

7-56 

746 

7.36 

7.26 

7.16 

7.06 

6.95 

6.85 

6-75 

6.65 

6-55 

645 

6-35 

16 

8.29 

8.18 

8.07 

7.96 

7.86 

7-75 

7.64 

7-54 

743 

7-32 

7.21 

7.11 

7.00 

6.89 

6.78 

17 

8.82 

8.70 

8.59 

8.47 

8.36 

8.24 

8.13 

8.02 

7.90 

7-79 

7-67 

7.56 

745 

7-33 

7.21 

18 

9-35 

9.22 

9.10 

8.98 

8.86 

8-74 

8.62 

8.50 

8-37 

8.25 

8.13 

8.01 

7.89 

7.77 

7.65 

19 

9.87 

9-75 

9.62 

949 

9.36 

9-23 

9.11 

8.98 

8.85 

8.72 

8-59 

8.47 

8-34 

8.21 

8.08 

20 

0.41 

10.27 

10.14 

IO.OO 

9.87 

9-73 

9.60 

9.46 

9-32 

9.19 

9.05 

8.92 

8.78 

8.65 

8.51 

/          / 

BAROMETRIC    PRESSURE   IN    MILLIMETRES    (B}. 

620 

610 

600 

590 

580 

570 

560 

550 

540 

530 

520 

510 

500 

490 

480 

c. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

|O 

0.42 

0.41 

0.40 

0.40 

0-39 

0.38 

0.38 

0-37 

0.36 

0.36 

0.35 

0-34 

0-34 

0-33 

0.32 

2 

0.82 

0.8l 

0.8o 

0.78 

0.77 

0.76 

0.75 

0.73 

0.72 

0.70 

0.69 

0.68 

0.67 

0.65 

0.64 

3 

1.24 

1.22 

1.20 

I.I7 

I.I5 

I.I3 

1.  12 

1.  10 

1.  08 

1.06 

1.04 

1.02 

1.  00 

0.98 

0.96 

4 

1.65 

1.62 

1.  60 

1-57 

1-54 

1.51 

1.49 

1.46 

1.44 

1.41 

1.38 

1.36 

1-33 

1.30 

1.28 

5 

2.06 

2.03 

1.99 

I.96 

1-93 

1.90 

1.86 

1.83 

i.So 

1.76 

i-73 

1.70 

1.66 

1.63 

1.  60 

6 

2.47 

243 

2.39 

2.35 

2.32 

2.28 

2.24 

2.2O 

2.16 

2.12 

2.08 

2.04 

2.OO 

I.96 

1.92 

7 

2.89 

2.84 

2.80 

2-75 

2.71 

2.66 

2.61 

2.56 

2.52 

247 

243 

2.38 

2-33 

2.28 

2.24 

8 

3-31 

3.26 

3-20 

3-15 

3.10 

3-04 

2.99 

2-94 

2.88 

2.83 

2.78 

2.72 

2.67 

2.62 

2.56 

9 

3-73 

3.67 

*6i 

3-55 

349 

343 

3-37 

3-31 

3-25 

3.19 

3-13 

3.06 

3.00 

2.94 

2.88 

10 

4.14 

4.07 

4.01 

3.94 

3-88 

3.8i 

3-74 

3.67 

3-6i 

3-54 

348 

341 

3.34 

3-27 

3.21 

ii 

4.56 

449 

4.42 

4-34 

4.27 

4.19 

4.12 

4.05 

3-97 

3-90 

3-83 

3.75 

3.68 

3-60 

3-53 

12 

4.98 

4.90 

4.82 

4-74 

4.66 

4-58 

4.50 

4.42 

4-34 

4.26 

4.18 

4.10 

4.02 

3-93 

3.85 

13 

540 

5-31 

5-23 

5-14 

5-05 

4-96 

4.88 

4-79 

4.70 

4.62 

4.53 

444 

4.36 

4.27 

4.18 

14 

5.83 

5-73 

5-64 

5.54 

545 

5-35 

5.26 

5.17 

5-07 

4.98 

4.88 

4-79 

4.70 

4.60 

4-51 

15 

6.25 

6.15 

6.05 

5-95 

5.85 

5-74 

5-64 

5-54 

5-44 

5.34 

5-24 

5-14 

5.04 

4-94 

4.84 

16 

6.68 

6.57 

6.46 

6.35 

6.24 

6.14 

6.03 

5-92 

5-8i 

5-71 

5.6o 

549 

5.38 

5-27 

5.17 

17 

7.10 

6.98 

6.87 

6.75 

6.64 

6.53 

6.41 

6.30 

6.18 

6.07 

5-95 

5.84 

5.72 

5-6i 

5-50 

18 

7-52 

7.40 

7.28 

7.16 

7.04 

6.92 

6.80 

6.67 

6.55 

6.43 

6.31 

6.19 

6.07 

5-95 

5.83 

19 

7-95 

7.82 

7.70 

7-57 

7-44 

7-31 

7.18 

7-05 

6-93 

6.80 

6.67 

6-54 

6.42 

6.29 

6.16 

20 

8.38 

8.24 

8.ii 

7-97 

7.84 

7.70 

7-57 

743 

7-30 

7.16 

7-03 

6.90 

6.76 

6.62 

6-49 

SMITHSONIAN  TABLES. 


TABLE   45. 


RELATIVE    HUMIDITY. 

TEMPERATURE   CENTIGRADE. 


Depres- 
sion of  the 
dew-point. 

t  —  d. 

DEW-POINT  (d). 

-15° 

-10° 

-5° 

0° 

+  5° 

+  10° 

4-15° 

+  20° 

+  25° 

+  30° 

C. 

0?0 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

IOO 

0.2 

98 

98 

99 

99 

99 

99 

99 

99 

99 

99 

0.4 

97 

97 

97 

97 

97 

97 

97 

98 

98 

98 

0.6 

95 

95 

96 

96 

96 

96 

96 

96 

97 

97 

0.8 

94 

.   94 

94 

94 

95 

95 

95 

95 

95 

96 

1.0 

92 

92 

93 

93 

93 

94 

94 

94 

94 

94 

1.2 

9i 

9i 

9i 

92 

92 

92 

93 

93 

93 

93 

1.4 

89 

90 

90 

9i 

9i 

9i 

92 

92 

92 

1.6 

88 

88 

89 

90 

91 

91 

91 

1.8 

86 

87 

87 

88 

89 

89 

90 

90 

90 

2.0 

85 

86 

86 

87 

87 

88 

88 

88 

89 

89 

2.2 

84 

84 

85 

85 

86 

86 

87 

87 

88 

88 

2.4 

83 

83 

84 

84 

85 

85 

86 

86 

87 

87 

2.6 

82 

82 

82 

83 

84 

84 

85 

85 

86 

86 

2.8 

80 

80 

81 

82 

83 

83 

84 

84 

85 

85 

3.0 

78 

79 

80 

81 

81 

82 

83 

83 

84 

84 

3-2 

77 

78 

79 

80 

80 

81 

82 

82 

83 

83 

34 

76 

77 

78 

79 

79 

80 

81 

81 

82 

82 

3-6 

75 

76 

77 

77 

78 

79 

80 

80 

81 

82 

3-8 

74 

75 

75 

76 

77 

78 

79 

79 

So 

Si 

4.0 

72 

73 

74 

75 

76 

77 

78 

78 

79 

80 

4.2 

7i 

72 

73 

74 

75 

76 

77 

77 

78 

79 

44 

7o 

7i 

72 

73 

74 

75 

76 

77 

77 

78 

4.6 

69 

70 

7i 

72 

73 

74 

75 

76 

76 

77 

4.8 

68 

69 

70 

7i 

72 

73 

74 

75 

75 

76 

5.0 

67 

68 

69 

70 

7i 

72 

73 

74 

75 

75 

5-2 

66 

67 

68 

69 

70 

7i 

72 

73 

74 

75 

54 

65 

66 

67 

68 

69 

70 

7i 

72 

73 

74 

5-6 

64 

65 

66 

67 

68 

69 

70 

7i 

72 

73 

5-8 

63 

64 

65 

66 

68 

69 

69 

70 

7i 

72 

6.0 

62 

63 

64 

66 

67 

68 

69 

70 

7° 

7i 

6.2 

61 

62 

63 

65 

66 

67 

68 

69 

70 

7i 

6.4 

60 

6r 

63 

64 

65 

66 

67 

68 

69 

70 

6.6 

59 

60 

62 

63 

64 

65 

66 

67 

68 

69 

6.8 

58 

60 

61 

62 

63 

64 

65 

66 

6/ 

68 

7.0 

57 

59 

60 

61 

62 

63 

65 

66 

67 

68 

7.2 

56 

58 

59 

60 

62 

63 

64 

65 

66 

67 

74 

55 

57 

58 

60 

61 

62 

63 

64 

65 

66 

7-6 

55 

56 

57 

59 

60 

61 

62 

63 

64 

65 

7-8 

54 

55 

57 

58 

59 

60 

62 

63 

64 

65 

8.0 

53 

54 

56 

57 

58 

60 

61 

62 

63 

64 

SMITHSONIAN  TABLES. 


144 


TABLE  45 


RELATIVE    HUMIDITY. 

TEMPERATURE  CENTIGRADE. 


Depres- 
sion of  the 
dew-point. 

t  —  d. 

DEW-POINT  (d). 

-15° 

-10° 

-5° 

0° 

+  5° 

+  10° 

+  15° 

+  20° 

+  25° 

+  30° 

c. 
8?0 

53 

54 

56 

57 

58 

60 

61 

62 

63 

64 

8.2 

52 

54 

55 

56 

57 

59 

60 

61 

62 

63 

8.4 

51 

53 

54 

56 

57 

58 

59 

60 

62 

63 

8.6 

5i 

52 

54 

55 

56 

57 

58 

60 

61 

62 

8.8 

50 

5i 

53 

54 

55 

57 

58 

59 

60 

61 

9.0 

49 

5i 

52 

53 

55 

56 

57 

58 

60 

61 

9.2 

48 

50 

5i 

53 

54 

55 

57 

•58 

59 

60 

94 

48 

49 

5i 

52 

53 

55 

56 

57 

58 

59 

9-6 
9.8 

47 
46 

48 
48 

50 
49 

5i 
5i 

53 
52 

54 
53 

55 
55 

56 

56 

58 

57 

P 

10.0 

46 

47 

49 

50 

5i 

53 

54 

55 

56 

57 

10.5 

44 

45 

47 

48 

50 

5i 

52 

54 

55 

II.O 

42 

44 

45 

47 

48 

49 

5i 

52 

53 

"•5 

4i 

42 

44 

45 

47 

48 

49 

5i 

52 

12.0 

39 

4i 

42 

44 

45 

47 

48 

49 

50 

12.5 
13-0 

38 
36 

39 
33 

4i 
40 

42 
4i 

44 
43 

45 
44 

46 

45 

48 

46 

8 

13-5 

35 

37 

38 

40 

42 

43 

44 

45 

46 

14.0 

34 

35 

37 

38 

40 

4i 

43 

44 

45 

JJ.5 

33 

34 

36 

37 

39 

40 

4i 

43 

44 

15-0 

3i 

33 

35 

36 

37 

39 

40 

42 

15-5 

30 

32 

33 

35 

36 

38 

39 

40 

16.0 

29 

3i 

32 

34 

35 

37 

38 

39 

16.5 

28 

30 

31 

33 

34 

36 

37 

38 

17.0 

27 

29 

30 

32 

33 

35 

36 

37 

17-5 

26 

28 

29 

3i 

32 

34 

35 

36 

18.0 

25 

27 

28 

30 

3i 

33 

34 

35 

18.5 

25 

26 

27 

29 

30 

32 

33 

34 

19.0 

24 

25 

27 

28 

29 

3i 

32 

33 

19-5 

23 

24 

26 

27 

29 

30 

3i 

33 

20.0 

22 

24 

25 

26 

28 

29 

30 

32 

21.0 

21 

22 

23 

25 

26 

27 

29 

22.0 

19 

21 

22 

23 

25 

26 

27 

23.0 

18 

X9 

21 

22 

23 

24 

26 

24.0 

17 

18 

19 

21 

22 

23 

24 

25.0 

16 

17 

18 

19 

21 

22 

23 

26.0 

15 

16 

17 

18 

2O 

21 

27.0 

14 

15 

16 

17 

18 

20 

28.0 

13 

14 

15 

16 

17 

19 

29.0 

12 

13 

14 

15 

16 

IS 

30.0 

II 

12 

13 

14 

16 

17 

SMITHSONIAN  TABLES. 


145 


TABLE   46. 


REDUCTION    OF    SNOWFALL    MEASUREMENTS. 


Depth   of   water    corresponding    to    the   weight    of   snow   (or    rain)    collected 

in    an    8-inch    gage. 


Wei,* 
Snow. 

Oz. 
0 

Oz. 

1 
4 

Oz. 

1 
2 

Oz. 
3 
4 

Weight 
of 
Snow. 

Oz. 
0 

Oz. 

1 
4 

Oz. 

1 
2 

Oz. 
3 
4 

Weight 
of 
Snow. 

Oz. 
0 

Oz. 

1 
4 

Oz. 

1 
2 

Oz. 
3 
4 

UJ.QZ. 

Inch. 

Inch. 

Inch. 

Inch. 

U>.0z. 

Inch's 

Inch's 

Inch's 

Inch's 

U>.Oz. 

Inch's 

Inch's 

Inch's 

Inch's 

0 

0.00 

O.OI 

O.O2 

0.03 

1    8 

0.83 

0.83 

0.84 

0.85 

2  13 

1-55 

1.56 

i-57 

i-57 

i 

•03 

.04 

•05 

.06 

9 

.86 

•87 

.88 

.89 

2    14 

1.58 

!-59 

1.60 

1.61 

2 

.07 

.08 

.09 

.09 

10 

.89 

.90 

•91 

•92 

2    15 

1.62 

1-63 

1-63 

1.64 

3 

.IO 

.11 

.12 

•13 

ii 

•93 

•94 

•94 

•95 

4 

.14 

•15 

•15 

.16 

12 

.96 

•97 

•98 

•99 

5 

0.17 

o.iS 

0.19 

0.20 

13 

1.  00 

1.  01 

I.OI 

1.02 

3   0 

i.65 

.66 

1.67 

1.68 

6 

.21 

.22 

.22 

•23 

H 

1.03 

1.04 

1.05 

1.  06 

3    i 

I.69 

.69 

1.70 

1.71 

7 

.24 

•25 

.26 

•27 

15 

1.07 

1.08 

1.  08 

1.09 

3    2 

1.72 

•73 

1.74 

1-75 

8 

.28 

.28 

•29 

•30 

3    3 

i-75 

.76 

1.77 

1.78 

9 

•31 

•32 

•33 

•34 

3    4 

1.79 

.80 

1.81 

1.81 

10 

o-34 

0-35 

0.36 

0-37 

2   0 

1.  10 

i.  n 

1.  12 

1-13 

3    5 

1.82 

1.83 

1.84 

1.85 

ii 

.38 

•39 

.40 

.41 

2      I 

1.14 

1.14 

I-I5 

1.16 

3    6 

1.86 

1.87 

1.87 

1.88 

12 

.41 

•42 

43 

44 

2      2 

1.17 

1.18 

I.I9 

i.  20 

3    7 

1.89 

1.90 

1.91 

1.92 

13 

45 

.46 

.46 

•47 

2     3 

1.  20 

1.  21 

1.22 

1.23 

3    8 

i-93 

1.94 

i-94 

1-95 

H 

.48 

•49 

•50 

•5i 

2    4 

1.24 

1.25 

1.26 

1.26 

3    9 

1.96 

1.97 

1.98 

1.99 

15 

•52 

•52 

•53 

•54 

1    0 

o.55 

0.56 

0-57 

0.58 

2    5 

1.27 

1.28 

1.29 

1.30 

3  10 

2.00 

2.00 

2.01 

2.O2 

I    I 

.58 

'•59 

.60 

.61 

2     6 

1.31 

1.32 

1.32 

i-33 

3  ii 

2.03 

2.04 

2.05 

2.06 

2 

.62 

•63 

.64 

•65 

2    7 

i-34 

i-35 

1.36 

1-37 

3  12 

2.06 

2.07 

2.08 

2.O9 

3 

.65 

.66 

.67 

.68 

2     8 

1.38 

1.38 

1-39 

1.40 

3  13 

2.10 

2.  1  1 

2.12 

2.12 

4 

.69 

.70 

•71 

•7i 

2    9 

1.41 

1.42 

143 

1.44 

3  H 

2.13 

2.14 

2.15 

2.16 

3  J5 

2.17 

2.18 

2.18 

2.19 

5 

0.72 

0-73 

0.74 

o.75 

2  10 

1.44 

1-45 

1.46 

1.47 

6 

.76 

•77 

•77 

.78 

2    II 

1.48 

1.49 

1.50 

I-5I 

4   0 

2.20 

i    7 

•79 

.80 

.81 

.82 

2    12 

1-51 

1-52 

i-53 

1-54 

5    o 

2-75 

TABLE    47. 

RATE    OF    DECREASE    OF   VAPOR    PRESSURE    WITH    ALTITUDE. 

(According'  to  the  empirical  formula  ofDr.J.  ffanri}. 
f  -   h 

z—  =  TO      7^7^' 


/c 


=  10      6517 


f,f0  —  Vapor  pressures  at  an  upper  and  a  lower  station  respectively. 
h  =  Difference  of  altitude  in  metres. 


Difference  of  Altitude. 

/ 

/o' 

Difference  of  Altitude. 

/ 

/o  ; 

Difference  of  Altitude. 

/ 
/o' 

metres. 

Feet. 

metres. 

Feet. 

metres. 

Feet. 

200 

656 

0-93 

1800 

59°5 

0.53 

3400 

1  1  155 

0.30 

400 

1312 

.87 

2OOO 

6562 

49 

3600 

nSn 

.28 

600 

1968 

.81 

2200 

7218 

.46 

3800 

12467 

.26 

800 

2625 

•75 

2400 

7874 

43 

4000 

I3I23 

•24 

IOOO 

3281 

0.70 

2600 

8530 

0.40 

4500 

14764 

O.2O 

1200 

3937 

•65 

2800 

9186 

•37 

5000 

16404 

•17 

1400 

4593 

.61 

3000 

9842 

•35 

5500 

18045 

.14 

I600 

5249 

•57 

320C 

10499 

•32 

6OOO 

19685 

.12 

SMITHSONIAN  TABLES. 


T46 


WIND    TABLES. 


Mean  direction  of  the  wind  by  Lambert's  formula  — 

Multiples  of  cos  45° ;   form  and  example  of  computation  .  TABLE  48 

Values  of  the  mean  direction  (a)  or  its  complement  (90  —  a)  49 

Synoptic  conversion  of  velocities TABLE  50 

Miles  per  hour  into  feet  per  second     .     .     .     .     .     ....  TABLE  5 1 

Feet  per  second  into  miles  per  hour   .     .     .     .     .     ....     .  TABLE  52 

Metres  per  second  into  miles  per  hour    ....     .  .  .     ;     .  TABLE  53 

Miles  per  hour  into  metres  per  second     ........  TABLE  54 

Metres  per  second  into  kilometres  per  hour      .    _.,...„,.  ....     .  TABLE  55 

Kilometres  per  hour  into  metres  per  second     .     .     .     .     .     .  TABLE  56 

Beaufort  scale  for  winds  at  sea    .     .     .     .     .     ....     .     .     .  TABLE  57 


147 


TABLE   48. 

MEAN    DIRECTION    OF    THE    WIND    BY   LAMBERT'S    FORMULA. 

_E 


Multiples    of   cos  45°. 


Number. 

0 

• 

2 

3 

4 

5 

6 

7 

8 

9 

0 

0.0 

0.7 

1.4 

2.1 

2.8 

3.5 

4.2 

4.9 

5-7 

i 
6-4 

10 

7-i 

7.8 

8.5 

9.2 

9.9 

10.6 

"•3 

12.  0 

12.7 

13-4  ' 

20 

14.1 

14.8 

15.6 

I6.3 

17.0 

17.7 

18.4 

I9.I 

19.8 

20.5   ; 

30 

21.2 

21.9 

22.6 

23-3 

24.0 

24.7 

25.5 

26.2 

26.9 

27.6 

40 

28.3 

29.0 

29.7 

3°-4 

31.1 

31-8 

32.5 

33.2 

33-9 

34-6 

50 

354 

36.1 

36.8 

37-5 

38.2 

38-9 

39-6 

40.3 

41.0 

41.7 

60 

42.4 

43-1 

43-8 

44.5 

45.3 

46.0 

46.7 

47-4 

48.1 

48.8 

70 

49-5 

50.2 

50-9 

51.6 

52.3 

53-0 

53-7 

54-4 

55-2 

55-9 

80 

56.6 

57-3 

58.0 

58.7 

59.4 

60.  i 

60.8 

61.5 

62.2 

62.9 

90 

63.6 

64-3 

65.I 

65.8 

66.5 

67.2 

67.9 

68.6 

69.3 

70.0 

100 

70.7 

71.4 

72.1 

72.8 

73-5 

74.2 

75-0 

75-7 

76.4 

77-1 

no 

77-8 

78.5 

79-2 

79-9 

80.6 

81.3 

82.0 

82.7 

83-4 

84.1 

120 

84.9 

85.6 

86.3 

87.0 

87.7 

88.4 

89.1 

89.8 

9°-5 

91.2 

130 

91.9 

92.6 

93-3 

94.0 

94-8 

95-5 

96.2 

96.9 

97-6 

98.3 

140 

99.0 

99-7 

100.4 

IOI.I 

loi.S 

102.5 

103.2 

103.9 

104.7 

105.4 

150 

106.  i 

106.8 

107.5 

108.2 

108.9 

109.6 

110.3 

III.O 

111.7 

112.4 

160 

113.1 

113.8 

114.6 

II5-3 

116.0 

116.7 

117.4 

118.1 

118.8 

H9.5 

170 

1  20.  2 

120.9 

121.  6 

122.3 

123.0 

123.7 

124.5 

125.2 

125.9 

126.6 

180 

127.3 

128.0 

128.7 

129.4 

130.1 

130.8 

I3I.5 

132.2 

132.9 

133.6 

190 

134-4 

i35.i 

135-8 

136.5 

137.2 

137.9 

138.6 

139.3 

140.0 

140.7 

200 

I4I.4 

142.1 

142.8 

143-5 

144.2 

145-0 

145-7 

146.4 

147.1 

147.8 

Form  for  Computing  the   Numerator  and   Denominator. 


Directions. 

E             W 

N 

5 

NE        SW 

SE       NW 

Observed  values. 

7            12 

6 

26 

J3           45 

2                 24 

E-W 

N-S 

NE-SW 

SE-NW 

[      -5      ] 

[  -*>  ] 

[-32]x-45= 

[-22]X^45« 

Numerator  («). 

[      -5       ]                 +                 [    -22.6    ]  +  [    -15.6    ]  =  [-43-2]' 

Denominator  (W). 

[       —20         ]    +    [       —22.6     ]    —    [     —15.6     ]   =  [—  27>oJ 

a  is  the  angle  between  the  mean  wind  direction  and  the  meridian. 
The  signs  of  the  numerator  (n)  and  denominator  (d)  determine  the  quadrant  in  which  a  lies. 

When    n    and    d    are    positive,  a  lies  between  N  and  E  :  —  =  NE. 

When    n   is   positive   and  d  negative,  a  lies  between  S  and  E  :  —  =  SE. 

When    n    and    d    are   negative,  a  lies  between  S  and  W :  ——Sly. 

When    n    is    negative    and    d   positive,  a  lies  between  N  and  W:  — —NW. 

148 


TABLE  49. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S    FORMULA. 
Values   of   the    mean   direction  (a)  or  its   complement  (90°— a). 
a  —  tan-*  n/d 


n 
or 

d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  «). 

10 

15 

20 

25 

30 

35 

40 

45 

50 

55 

60 

65 

70 

75 

80 

85 

90 

95 

too 

2 

II 

8 

6 

5 

4 

3 

3 

3 

2 

2 

2 

2 

2 

2 

i 

i 

i 

i 

I 

3 

17 

ii 

9 

7 

6 

5 

4 

4 

3 

3 

3 

3 

2 

2 

2 

2 

2 

2 

2 

4 

22 

15 

ii 

9 

8 

7 

6 

5 

5 

4 

4 

4 

3 

3 

3 

3 

3 

2 

2 

5 

27 

18 

14 

ii 

9 

8 

7 

6 

6 

5 

5 

4 

4 

4 

4 

3 

3 

3 

3 

6 

31 

22 

17 

13 

ii 

10 

9 

8 

7 

6 

6 

5 

5 

5 

4 

4 

4 

4 

3 

7 

35 

25 

19 

16 

J3 

ii 

10 

9 

8 

7 

7 

6 

^6 

5 

5 

5 

4 

4 

4 

8 

39 

28 

22 

18 

15 

13 

ii 

10 

9 

8 

8 

7 

7 

6 

6 

5 

5 

5 

5 

9 

42 

31 

24 

20 

17 

14 

13 

ii 

10 

9 

9 

8 

7 

7 

6 

6 

6 

5 

5 

10 

45 

34 

27 

22 

18 

16 

14 

13 

ii 

10 

9 

9 

8 

8 

7 

7 

6 

6 

6 

ii 

36 

29 

24 

20 

17 

15 

14 

12 

ii 

10 

10 

9 

8 

8 

7 

7 

7 

6 

12 

39 

31 

26 

22 

19 

17 

15 

13 

12 

ii 

10 

10 

9 

9 

8 

8 

7 

13 

4i 

33 

27 

23 

20 

18 

16 

*5 

13 

12 

ii 

ii 

10 

9 

9 

8 

8 

7 

14 

43 

35 

29 

25 

22 

19 

17 

16 

14 

13 

12 

ii 

ii 

10 

9 

9 

8 

8 

15 

45 

37 

31 

27 

23 

21 

18 

17 

15 

14 

T3 

12 

ii 

ii 

10 

9 

9 

9 

16 

39 

33 

28 

25 

22 

20 

18 

16 

15 

14 

T3 

12 

ii 

ii 

10 

10 

9 

17 

40 

34 

30 

26 

23 

21 

*9 

17 

16 

15 

14 

13 

12 

ii 

ii 

10 

10 

18 

42 

36 

31 

27 

24 

22 

20 

18 

17 

15 

14 

13 

13 

12 

ii 

ii 

10 

19 

44 

37 

32 

28 

25 

23 

21 

19 

18 

16 

15 

14 

13 

13 

12 

ii 

ii 

20 

45 

39 

34 

30 

27 

24 

22 

20 

18 

17 

16 

15 

14 

13 

13 

12 

ii 

21 

40 

35 

31 

28 

25 

23 

21 

19 

18 

17 

16 

15 

14 

13 

12 

12 

22 

4i 

36 

32 

29 

26 

24 

22 

20 

19 

17 

16 

15 

15 

14 

13 

12 

23 

43 

37 

33 

30 

27 

25 

23 

21 

J9 

18 

17 

16 

15 

14 

14 

13 

24 

44 

39 

34 

31 

28 

26 

24 

22 

20 

19 

18 

J7 

16 

15 

14 

13 

25 

45 

40 

36 

32 

29 

27 

24 

23 

21 

20 

18 

17 

16 

16 

15 

14 

26 

4i 

37 

33 

30 

27 

25 

23 

22 

20 

19 

18 

17 

16 

15 

15 

27 

42 

38 

34 

31 

28 

26 

24 

22 

21 

20 

19 

18 

17 

16 

15 

28 

43 

39 

35 

32 

29 

27 

25 

23 

22 

20 

19 

18 

17 

16 

16 

29 

44 

40 

36 

33 

30 

28 

26 

24 

23 

21 

20 

19 

18 

J7 

16 

30 

45 

41 

37 

34 

31 

29 

27 

25 

23 

22 

21 

19 

18 

18 

17 

3i 

42 

38 

35 

32 

29 

27 

25 

24 

22 

21 

20 

19 

18 

17 

32 

42 

39 

35 

33 

30 

28 

26 

25 

23 

22 

21 

20 

19 

IS' 

33 

43 

40 

36 

33 

31 

29 

27 

25 

24 

22 

21 

20 

!9 

18 

34 

44 

40 

37 

34 

32 

30 

28 

26 

24 

23 

22 

21 

20 

19 

35 

45 

4i 

38 

35 

32 

3° 

28 

27 

25 

24 

22 

21 

20 

19 

36 

42 

39 

36 

33 

3i 

29 

27 

26 

24 

23 

22 

21 

20 

37 

43 

39 

37 

34 

32 

30 

28 

26 

25 

24 

22 

21 

20 

38 

44 

40 

37 

35 

32 

30 

28 

27 

25 

24 

23 

22 

21 

39 

44 

4i 

38 

35 

33 

31 

29 

27 

26 

25 

23 

22 

21 

40 

45 

42 

39 

36 

34 

32 

30 

28 

27 

25 

24 

23 

22 

41 

42 

39 

37 

34 

32 

30 

29 

27 

26 

24 

23 

22 

42 

43 

40 

37 

35 

33 

31 

29 

28 

26 

25 

24 

23 

43 

44 

4i 

38 

36 

33 

32 

30 

28 

27 

26 

24 

23 

44 

44 

4i 

39 

36 

34 

32 

30 

29 

27 

26 

25 

24 

45 

45 

42 

39 

37 

35 

33 

31 

29 

28 

27 

25 

24 

46 

43 

40 

37 

35 

33 

32 

30 

28 

27 

26 

25 

'  47 

43 

4i 

38 

36 

34 

32 

30 

29 

28 

26 

25 

48 

44 

4i 

39 

36 

34 

33 

3^ 

29 

28 

27 

26 

49 

44 

42 

39 

37 

35 

33 

31 

30 

29 

27 

26 

50 

45 

42 

40 

38 

36 

34 

32 

30 

29 

28 

27 

SMITHSONIAN  TABLES 


149 


TABLE  49. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S    FORMULA. 
.   Values   of   the    mean    direction    (a)    or    its    complement    (90°— a). 


n  or  d. 

\ 

DENOMINATOR  OR  NUMERATOR  (d  OR  »). 

105 

NO 

115 

120 

125 

130 

135 

140 

145 

150 

1 

1° 

i° 

0° 

0° 

o° 

0° 

0°       0° 

0° 

0° 

2 

i 

i 

i 

i 

i 

i 

T 

i 

i 

i 

3 

2 

2 

i 

i 

i 

i 

i 

i 

i 

i 

4 

2 

2 

2 

2 

2 

2 

2 

2 

2 

2 

5 

3 

3 

2 

2 

2 

2 

2 

2 

2 

2 

6 

3 

3 

3 

3 

3 

3 

3 

2 

2 

2 

7 

4 

4 

3 

3 

3 

3 

3 

3 

3 

3 

8 

4 

4 

4 

4 

4 

4 

3 

3 

3 

3 

9 

4 

4 

4 

4 

4 

4 

4 

4 

4 

3 

10 

5 

5 

5 

5 

5 

4 

4 

4 

4 

4 

ii 

6 

6 

5 

5 

5 

5 

5 

4 

4 

4 

12 

7 

6 

6 

6 

5 

5 

5 

5 

5 

5 

13 

7 

7 

6 

6 

6 

6 

6 

5 

5 

5 

14 

8 

7 

7 

7 

6 

6 

6 

6 

6 

5 

15 

8 

8 

7 

7 

7 

7 

6 

6 

6 

6 

16 

9 

8 

8 

8 

7 

7 

7 

7 

6 

6 

17 

9 

9 

8 

8 

8 

7 

7 

7 

7 

6 

18 

10 

9 

9 

9 

8 

8 

8 

7 

7 

7 

19 

10 

IO 

9 

9 

9 

8 

8 

8 

7 

7 

20 

ii 

10 

10 

9 

9 

9 

8 

8 

8 

8 

21 

ii 

ii 

10 

10 

10 

9 

9 

9 

8 

8 

22 

12 

ii 

ii 

10 

10 

IO 

9 

9 

9 

8 

23 

12 

12 

ii 

ii 

10 

IO 

IO 

9 

9 

9 

24 

T3 

12 

12 

ii 

ii 

IO 

10 

10 

9 

9 

25 

13 

13 

12 

12 

ii 

II 

10 

IO 

IO 

9 

26 

14 

13 

13 

12 

12 

II 

II 

ii 

IO 

10 

27 

14 

14 

13 

13 

12 

12 

II 

ii 

ii 

10 

28 

15 

H 

14 

13 

13 

12 

12 

ii 

ii 

ii 

29 

15 

15 

J4 

14 

13 

13 

12 

12 

ii 

ii 

30 

16 

15 

15 

J4 

13 

13 

13 

12 

12 

ii 

31 

16 

16 

15 

14 

14 

13 

13 

12 

12 

12 

32 

17 

16 

16 

15 

14 

14 

13 

12 

12 

33 

17 

17 

16 

15 

15 

14 

14 

13 

13 

12 

34 

18 

17 

16 

16 

15 

15 

14 

14 

13 

13 

35 

18 

18 

17 

16 

16 

15 

15 

14 

H 

13 

36 

19 

18 

17 

17 

16 

15 

15 

H 

14 

13 

37 

19 

19 

18 

17 

16 

16 

15 

15 

14 

14 

38 

20 

19 

18 

18 

17 

16 

16 

15 

15 

H 

39 

20 

20 

19 

18 

17 

17 

16 

16 

15 

15 

40 

21 

20 

19 

18 

18 

17 

17 

16 

15 

15 

41 

21 

20 

20 

J9 

18 

18 

17 

16 

16 

15 

42 

22 

21 

20 

19 

18 

17 

17 

16 

16 

43 

22 

21 

21 

20 

19 

18 

18 

17 

17 

16 

44 

23 

22 

21 

20 

J9 

19 

18 

17 

17 

16 

45 

23 

22 

21 

21 

20 

ig 

18 

18 

17 

17 

46 

24 

23 

22 

21 

20 

19 

19 

18 

18 

J7 

47 

24 

23 

22 

21 

21 

20 

19 

18 

17 

48 

25 

24 

23 

22 

21 

20 

20 

19 

18 

18 

49 

25 

24 

23 

22 

21 

21 

20 

19 

19 

18 

50 

25 

24 

23 

23 

22 

21 

2O 

20 

19 

18 

SMITHSONIAN  TABLES. 


TABLE  4-9. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S    FORMULA. 
Values   of  the    mean    direction    (a)    or    its    complement     (go0  — a). 


n  or  d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  «). 

155 

160 

165 

170 

175    180 

185 

190 

195 

200 

\ 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

0° 

2 

i 

i 

i 

i 

I 

I 

I 

i 

i 

i 

3 

i 

i 

i 

i 

I 

I 

1 

i 

i 

i 

4 

i 

i 

i 

i 

I 

I 

1 

i 

i 

i 

5 

2 

2 

2 

2 

2 

2 

2 

2 

i 

i 

6 

2 

2 

2 

2 

2 

2 

2 

2 

2 

2 

7 

3 

3 

2 

2 

2 

2 

2 

2 

2 

2 

8 

3 

3 

3 

3 

3 

3 

2 

2 

2 

2 

9 

3 

3 

3 

3 

3 

3 

3 

3 

3 

3 

10 

4 

4 

3 

3 

3 

3 

3 

3 

3 

3 

ii 

4 

4 

4 

4 

4 

3 

3 

3  . 

3 

3 

12 

4 

4 

4 

4 

4 

4 

4 

4 

4 

3 

13 

5 

5 

5 

4 

4 

4 

4 

4 

4 

4 

14 

5 

5 

5 

5 

5 

4 

4 

4 

4 

4 

15 

6 

5 

5 

5 

5 

5  . 

5 

5 

4 

4 

16 

6 

6 

6 

5 

5 

5 

5 

5 

5 

17 

6 

6 

6 

6 

6 

5 

5 

5 

5 

5 

18 

7 

7 

6 

6 

6 

6 

6 

6 

5 

5 

19 

7 

7 

7 

6 

6 

6 

6 

6 

6 

5 

20  ' 

7 

7 

7 

7 

7 

6 

6 

6 

6 

6 

21 

8 

7 

7 

7 

7 

7 

6 

6 

6 

6 

22 

8 

8 

8 

7 

7 

7 

7 

7 

6 

6 

23 

8 

8 

8 

8 

7 

7 

7 

7 

7 

7 

24 

9 

9 

8 

8 

8 

8 

7 

7 

7 

7 

25 

9 

9 

9 

8 

8 

8 

8 

7 

7 

7 

26 

10 

9 

9 

9 

8 

8 

8 

8 

8 

7 

11 

10 

10 

10 

10 

9 
10 

9 
9 

9 
9 

9 
9 

8 
9 

8 
8 

8 
8 

8 
8 

29 

II 

10 

10 

10 

9 

9 

9 

9 

8 

8 

30 

II 

ii 

10 

10 

10 

9 

9 

9 

9 

9 

3i 

II 

ii 

II 

10 

10 

10 

10 

9 

9 

9 

32 

12 

ii 

II 

II 

10 

10 

10 

10 

9 

9 

33 

12 

12 

II 

II 

ii 

10 

10 

10 

10 

9 

34 

12 

12 

12 

II 

ii 

ii 

10 

10 

10 

10 

35 

13 

12 

12 

12 

ii 

ii 

ii 

10 

10 

10 

36 

13 

13 

12 

12 

12 

ii 

ii 

ii 

10 

10 

37 

13 

13 

13 

12 

12 

12 

ii 

ii 

II 

10 

38 

H 

13 

13 

13 

12 

12 

12 

ii 

II 

II 

39 

14 

14 

13 

13 

13 

12 

12 

12 

II 

II 

40 

H 

14 

14 

!3 

13 

13 

12 

12 

12 

II 

4i 

15 

14 

14 

14 

13 

13 

12 

12 

12 

12 

42 

15 

15 

14 

14 

13 

13 

13 

12 

12 

12 

43 

16 

15 

15 

14 

14 

J3 

13 

13 

12 

12 

44 

16 

15 

15 

15 

14 

H 

13 

13 

13 

12 

45 

16 

16 

15 

15 

14 

14 

14 

13 

13 

13 

46 

17 

16 

16 

15 

15 

14 

14 

14 

13 

13 

47 

17 

16 

16 

15 

15 

15 

14 

14 

14 

13 

48 

17 

17 

16 

16 

15 

15 

15 

14 

U 

13 

49 

18 

17 

17 

16 

16 

15 

15 

14 

14 

14 

50 

18 

17 

17 

16 

16 

16 

15 

15 

H 

M 

SMITHSONIAN  TABLES 


TABLE  49. 

MEAN    DIRECTION    OF   THE    WIND    BY    LAMBERT'S    FORMULA. 
Values   of  the   mean    direction  (a)    or   its   complement  (go0-  a). 


n 
or 
d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  »)• 

55 

60 

65 

70 

75 

80 

85 

90 

95 

100 

105 

no 

115 

120 

125 

130 

50 

42° 

40° 

38° 

36° 

34° 

32° 

30° 

29° 

28° 

27° 

25° 

24° 

23° 

23° 

22° 

21° 

52 

43 

4i 

39 

37 

35 

33 

3i 

30 

29 

27 

26 

25 

24 

23 

23 

22 

$4 

44 

42 

40 

38 

36 

34 

32 

3i 

30 

28 

27 

26 

25 

24 

23 

22 

56 

43 

4i 

39 

37 

35 

33 

32 

3i 

29 

28 

27 

26 

25 

24 

23 

58 

44 

42 

40 

38 

36 

34 

33 

3i 

30 

29 

28 

27 

26 

25 

24 

60 

45 

43 

4i 

39 

37 

35 

34 

32 

3i 

30 

29 

28 

27 

26 

25 

62 

44 

42 

40 

38 

36 

35 

33 

32 

3i 

29 

28 

27 

26 

25 

64 

45 

42 

40 

39 

37 

35 

34 

33 

3i 

30 

29 

28 

27 

26 

66 

43 

4i 

40 

38 

36 

35 

33 

32 

31 

30 

29 

28 

27 

68 

44 

42 

40 

39 

37 

36 

34 

33 

32 

3i 

30 

29 

28 

70 

45 

43 

4i 

39 

38 

36 

35 

34 

32 

3i 

30 

29 

28 

72 

44 

42 

40 

39 

37 

36 

34 

33 

32 

3i 

30 

29 

74 

45 

43 

4i 

39 

38 

37 

35 

34 

33 

32 

31 

30 

76 

44 

42 

40 

39 

37 

36 

35 

33 

32 

31 

30 

78 

44 

43 

4i 

39 

38 

37 

35 

34 

33 

32 

31 

80 

45 

43 

42 

40 

39 

37 

36 

35 

34 

33 

32 

82 

44 

42 

4i 

39 

38 

37 

35 

34 

33 

32 

84 

45 

43 

4i 

40 

39 

37 

36 

35 

34 

33 

86 

44 

42 

4i 

39 

38 

37 

36 

35 

33 

88 

44 

43 

4i 

40 

39 

37 

36 

35 

34 

90 

45 

43 

42 

4i 

39 

38 

37 

36 

35 

92 

44 

43 

4i 

40 

39 

37 

36 

35 

94 

45 

43 

42 

4i 

39 

38 

37 

36 

96 

44 

42 

4i 

40 

39 

38 

36 

98 

44 

43 

42 

40 

39 

38 

37 

100 

45 

44 

42 

4i 

40 

39 

38 

102 

44 

43 

42 

40 

39 

38 

104 

45 

43 

42 

4i 

40 

39 

106 

44 

43 

4i 

40 

39 

108 

44 

43 

42 

4i 

40 

MO 

45 

44 

43 

4i 

40 

112 

44 

43 

42 

4i 

114 

45 

44 

42 

4i 

116 

44 

43 

42 

118 

45 

43 

42 

120 

45 

44 

43 

122 

44 

43 

124 

45 

44 

126 

44 

120 

45 

130 

45 

SMITHSONIAN  TABLES 


152 


TABLE  49. 


MEAN    DIRECTION    OF    THE    WIND    BY    LAMBERT'S    FORMULA. 
Values  of  the   mean    direction    (a)  or    its   complement  (90°— a). 


n 
or 

d. 

DENOMINATOR  OR  NUMERATOR  (d  OR  «). 

130 

135 

140 

145 

150 

155 

160 

165 

170 

175 

180 

185 

190 

(95 

200 

50 

21° 

20° 

20° 

19° 

18° 

18° 

17° 

17° 

16° 

16° 

16° 

15° 

15° 

H° 

14° 

52 

22 

21 

20 

20 

19 

19 

18 

17 

17 

17 

16 

16 

15 

15 

15 

54 

22 

22 

21 

20 

20 

J9 

19 

18 

18 

17 

17 

16 

16 

15 

15 

56 

23 

23 

22 

21 

20 

20 

J9 

19 

18 

18 

17 

17 

16 

16 

16 

58 

24 

23 

23 

22 

21 

21 

20 

19 

19 

18 

18 

17 

17 

17 

16 

60 

25 

24 

23 

22 

22 

21 

21 

20 

19 

19 

18 

r8 

18 

17 

17 

62 

25 

25 

24 

23 

22 

22 

21 

21 

20 

20 

19 

19 

18 

18 

17 

64 

26 

25 

25 

.24 

23 

22 

22 

21 

21 

2O 

20 

19 

19 

18 

18 

66 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

19 

19 

1.8 

68 

28 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

2O 

20 

19 

19 

70 

28 

27 

27 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

19 

72 

29 

28 

27 

26 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

20 

74 

30 

29 

28 

27 

26 

26 

25 

24 

24 

23 

22 

22 

21 

21 

20 

76 

30 

29 

28 

28 

27 

26 

25 

25 

24 

23 

23 

22 

22 

21 

21 

73 

31 

3° 

29 

28 

27 

27 

26 

25 

25 

24 

23 

23 

22 

22 

21 

80 

32 

3i 

3° 

29 

28 

27 

27 

26 

25 

25 

24 

23 

23 

22 

22 

82 

32 

3i 

30 

29 

29 

28 

27 

26 

26 

25 

24 

24 

23 

23 

22 

84 

33 

32 

3i 

30 

29 

28 

28 

27 

26 

26 

25 

24 

24 

23 

23 

86 

33 

32 

32 

31 

30 

29 

28 

28 

27 

26 

26 

25 

24 

24 

23 

88 

34 

33 

32 

31 

30 

30 

29 

28 

27 

27 

26 

25 

25 

24 

24 

90 

35 

34 

33 

32 

31 

30 

29 

29 

28 

27 

27 

26 

25 

25 

24 

92 

35 

34 

33 

32 

32 

31 

3° 

29 

28 

28 

27 

26 

26 

25 

25 

94 

36 

35 

34 

33 

32 

31 

30 

30 

29 

28 

28 

27 

26 

26 

25 

96 

36 

35 

34 

34 

33 

32 

3i 

30 

29 

29 

28 

27 

27 

26 

26 

98 

37 

36 

35 

34 

33 

32 

3i 

31 

30 

29 

29 

28 

27 

27 

26 

100 

38 

37 

36 

35 

34 

33 

32 

31 

30 

30 

29 

28 

28 

27 

27 

IO2 

38 

37 

36 

35 

34 

33 

33 

32 

31 

30 

30 

29 

28 

28 

27 

IO4 

39 

38 

37 

36 

35 

34 

33 

32 

31 

31 

30 

29 

29 

28 

27 

1  06 

39 

38 

37 

36 

35 

34 

34 

33 

32 

31 

30 

30 

29 

29 

28 

108 

40 

39 

38 

37 

36 

35 

34 

33 

32 

32 

31 

30 

30 

29 

28 

110 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

31 

31 

30 

29 

29 

112 

4i 

40 

39 

38 

37 

36 

35 

34 

33 

33 

32 

31 

31 

30 

29 

114 

4i 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

32 

31 

30 

30 

Tl6 

42 

4i 

40 

39 

38 

37 

36 

35 

34 

34 

33 

32 

31 

3* 

3« 

118 

42 

4i 

40 

39 

38 

37 

36 

36 

35 

34 

33 

33 

32 

3i 

3r 

120 

43 

42 

4i 

40 

39 

38 

37 

36 

35 

34 

34 

33 

32 

32 

3i 

122 

43 

42 

4i 

40 

39 

38 

37 

36 

36 

35 

34 

33 

33 

32 

3i 

124 

44 

43 

42 

4i 

40 

39 

38 

37 

36 

35 

35 

34 

33 

32 

32 

126 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

34 

34 

33   32 

128 

45 

43 

42 

4i 

40 

40 

39 

38 

37 

36 

35 

35 

34 

33   33 

130 

45 

44 

43 

42 

41 

40 

39 

38 

37 

37 

36 

35 

34 

34 

33l 

132 

44 

43 

42 

4i 

40 

40 

39 

38 

37 

36 

35 

35 

34 

33 

134 

45 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

34 

34 

136 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

36 

35 

35 

34 

138 

45 

44 

43 

42 

4i 

40 

39 

38 

37 

37 

36 

35 

35 

140 

45 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

36 

36 

35 

142 

44 

43 

42 

42 

4i 

40 

39 

38 

38 

37 

36 

35 

144 

45 

.  44 

43 

42 

4i 

40 

39 

39 

38 

37 

36 

36 

146 

44 

43 

42 

42 

4i 

40 

39 

38 

38 

37 

•36 

148 

45 

44 

43 

42 

4i 

40 

39 

39 

38 

37 

37 

150 

45 

44 

43 

42 

4i 

4i 

40 

39 

38 

38 

37 

SMITHSONIAN  TABLES. 


153 


TABLE   so. 

SYNOPTIC    CONVERSION    OF   VELOCITIES. 

Miles    per    hour    into     metres    per    second,    feet    per   second 

'  and     kilometres    per    hour. 


I   Miles 
per 
hour. 

Metres 
per 
second. 

Feet 
per 
second. 

Kilome- 
tres per 
hour. 

Miles 
per 
hour. 

Metres       Feet 
per          per 
second,   second. 

Kilome- 
tres per 
hour. 

Miles 
per 
hour. 

Metres 
per 
second. 

Feet 
per 
second. 

Kilome- 
tres per 
hour. 

0.0 

o.o 

o.o 

o.o 

26.0 

n.6 

38.1 

41.8 

52.0 

23.2 

76.3 

83.7 

o.5 

O.2 

0.7 

0.8 

26.5 

II.8 

38.9 

42.6 

52.5 

23-5 

77.0 

84.5 

I.O 

0.4 

1-5 

1.6 

27.0 

12.  1 

39-6 

43-5 

53-0 

23.7 

77.7 

85.3 

1-5 

0.7 

2.2 

24 

27-5 

12.3 

40.3 

44-3 

53-5 

23-9 

78.5 

86.1 

2.0 

0.9 

2.9 

3-2 

28.0 

T2.5 

41.1 

45-1 

54-0 

24.1 

79-2 

86.9 

2-5 

i.i 

3-7 

4.0 

28.5 

12.7 

41.8 

45-9 

54-5 

24.4 

79-9 

87.7 

3.0 

i-3 

44 

4.8 

29.0 

13.0 

42.5 

46.7 

55.0 

24.6 

80.7 

88.5 

3-5 

1.6 

5-1 

5-6 

29-5 

13.2 

43-3 

47-5 

55-5 

24.8 

81.4 

89.3 

4.0 

1.8 

5-9 

6.4 

30.0 

134 

44.0 

48.3 

56.0 

25.0 

82.1 

90.1 

4-5 

2.0 

6.6 

7.2 

30.5 

•13-6 

44-7 

49.1 

56.5 

25-3 

82.9 

90.9 

5-0 

2.2 

7-3 

8.0 

31.0 

13-9 

45-5 

49-9 

57-o 

25-5 

83.6 

91.7 

5-5 

2-5 

8.1 

8-9 

31-5 

I4.I 

46.2 

50.7 

57-5 

25-7 

84-3 

92.5 

6.0 

2-7 

8.8 

9-7 

32.0 

14-3 

46.9 

51-5 

58.0 

25-9 

85.1 

93-3 

6-5 

2.9 

9-5 

10.5 

32-5 

14-5 

47.7 

52.3 

58.5 

26.2 

85.8 

94.1 

7.0 

3-i 

10.3 

'n-3 

33-0 

14.8 

48.4 

53-i 

59-° 

26.4 

86.5 

95-o 

7-5 

3-4 

I  I.O 

12.  1 

33-5 

15.0 

49.1 

53-9 

59-5 

26.6 

87-3 

95-8 

8.0 

3-6 

11.7 

I2.9 

34-o 

15.2 

49-9 

54-7 

60.0 

26.8 

88.0 

96.6 

I      8-5 

3-8 

12.5 

13-7 

34-5 

154 

50.6 

55-5 

60.5 

27.0 

88.7 

974 

9.0 

4.0 

13.2 

14-5 

35.0 

15-6 

51-3 

56.3 

61.0 

27-3 

89.5 

98.2 

9-5 

4-2 

13-9 

15-3 

35.5 

15-9 

52.1 

57-1 

61.5 

27-5 

90.2 

99.0 

TO.O 

4.5 

14.7 

16.1 

36.0 

16.1 

52.8 

57-9 

62.0- 

27.7 

90.9 

99-8 

!       10.5 

4-7 

154 

16.9 

36.5 

16.3 

53-5 

58.7 

62.5 

27.9 

91.7 

100.6 

I  I.O 

4-9 

16.1 

17-7 

37-0 

16.5 

54-3 

59-5 

63.0 

28.2 

92.4 

101.4 

n-5 

5-i 

16.9 

18.5 

37-5 

16.8 

55-o 

60.4 

63.5 

28.4 

93-i 

102.2 

12.0 

54 

17.6 

19-3 

38.0 

17.0 

55-7 

61.2 

64.0 

28.6 

93-9 

103.0 

12.5 

5-6 

18.3 

20.  i 

38.5 

17.2 

56.5 

62.0 

64-5 

28.8 

94.6 

103.8 

13.0 

5-8 

19.1 

20.9 

39-o 

17.4 

57-2 

62.8 

65.0 

29.1 

95-3 

IO4.6 

1    J3-5 

6.0 

19.8 

21.7 

39-5 

17.7 

57-9 

63.6 

65-5 

29.3 

96.1 

1054 

14.0 

6-3 

20.5 

22.5 

40.0 

17.9 

58.7 

64.4 

66.0 

29.5 

96.8 

106.2 

14-5 

6-5 

21.3 

23-3 

40.5 

1  8.  i 

594 

65-2 

66.5 

29.7 

97.5 

107.0 

15.0 

6-7 

22.0 

24.1 

41.0 

18.3 

60.  i 

66.0 

67.0 

30.0 

98.3 

107.8 

15-5 

6-9 

22.7 

24.9 

4i-5 

18.6 

60.9 

66.8 

67.5 

30.2 

99.0 

108.6 

16.0 

7-2 

23-5 

25-7 

42.0 

18.8 

61.6 

67.6 

68.0 

3°4 

99-7 

109.4 

16.5 

74 

24.2 

26.6 

42-5 

19.0 

62.3 

68.4 

68.5 

30.6 

100.5 

IIO.  2 

17.0 

7-6 

24.9 

27.4 

43-o 

19.2 

63-1 

69.2 

69.0 

30.8 

IOI.2 

III.O 

17-5 

7-8 

25-7 

28.2 

43-5 

19.4 

63.8 

70.0 

69-5 

3I-1 

IOI.9 

1  1  1.8 

18.0 

8.0 

26.4 

29.0 

44.0 

19.7 

64-5 

70.8 

70.0 

31-3 

IO2.7 

112.7 

18.5 

8-3 

27.1 

29.8 

44-5 

19.9 

65.3 

71.6 

70.5 

31-5 

1034 

II3-5 

19.0 

8.5 

27-9 

30.6 

45-o 

20.  i 

66.0 

72.4 

71.0 

3L7 

IO4.I 

114-3 

19-5 

8.7 

28.6 

31-4 

45-5 

20.3 

66.7 

73-2 

71-5 

32.0 

104.9 

115.1 

2O.O 

8-9 

29-3 

32.2 

46.0 

2O.6 

67-5 

74.0 

72.0 

32.2 

105.6 

II5-9 

20.5 

9.2 

30.1 

33-0 

46.5 

20.8 

68.2 

74-8 

72.5 

324 

106.3 

116.7 

21.0 

94 

30.8 

33-8 

47.0 

21.0 

68.9 

75.6 

73.0 

32-6 

I07.I 

H7.5 

21.5 

9-6 

31-5 

34-6 

47-5 

21.2 

69-7 

764 

73-5 

32.9 

107.8 

118.3 

22.0 

9-8 

32.3 

354 

48.0 

2L5 

70.4 

77.2 

74.0 

33-i 

108.5 

119.1 

22.5 

10.  1 

33-o 

36.2 

48.5 

21.7 

71.1 

.  78.1 

74-5 

33-3 

109.3 

119.9 

23.0 

10.3 

33.7 

37-0 

49.0 

21.9 

71.9 

78.9 

75.o 

33-5 

IIO.O 

120.7 

23-5 

10.5 

34-5 

37.8 

49-5 

22.1 

72.6 

79-7 

75-5 

33.8 

110.7 

121.5 

24.0 

10.7 

35-2 

38.6 

50.0 

22.4 

73-3 

80.5 

76.0 

34-0 

111.5 

122.3 

24.5 

I  I.O 

35-9 

394 

50.5 

22.6 

74.1 

81.3 

76.5 

34-2 

112.  2 

123.1 

25.0 

II.  2 

36.7 

40.2 

51.0 

22.8 

74.8 

82.1 

77.0 

344 

II2.9 

123.9 

25-5 

11.4 

374 

41.0 

51-5 

23.0 

75-5 

82.9 

77-5 

34.6 

II3-7 

124.7 

26.0 

n.6 

38-1 

41.8 

52.0 

23.2 

76.3 

83.7 

78.0 

34-9 

1144 

125-5 

SMITHSONIAN  TABLES. 


154 


TABLE  51. 


MILES    PER    HOUR    INTO    FEET    PER    SECOND. 

i  mile  per  hour  =  —  feet  per  second. 


Miles 
per  hour. 

0 

• 

2 

3 

4 

5 

6 

7 

8 

9 

Feet  per 

Feet  per 

Feet  pei 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

Feet  per 

sec. 

sec. 

sec. 

sec. 

sec 

sec. 

sec. 

sec. 

sec. 

sec. 

0 

o.o 

1-5 

2-9 

4-4 

5-9 

7-3 

8.8 

10.3 

II.7 

13.2 

10 

14.7 

16.1 

17.6 

19.1 

20.5 

22.0 

23-5 

24.9 

26.4 

27.9 

20 

29-3 

30.8 

32.3 

33-7 

35-2 

36.7 

38.1 

39-6 

4I.I 

42.5 

3° 

44.0 

45-5 

46.9 

48.4 

49-9 

5L3 

52.8 

54-3 

55-7 

57.2 

40 

58.7 

60.  i 

61.6 

63-1 

64.5 

66.0 

67-5 

68.9 

70.4 

71.9 

50 

73-3 

74.8" 

76.3 

77-7 

79.2 

80.7 

82.1 

83.6 

85-1 

86.5 

60 

88.0 

89.5 

90.9 

92.4 

93-9 

95-3 

96.8 

98.3 

99.7 

IOI.2 

70 

102.7 

104.1 

105.6 

107.1 

108.5 

no.o 

111.5 

112.9 

114.4 

H5.9 

80 

II7-3 

118.8 

120.3 

121.7 

123.2 

124.7 

126.1 

127.6 

129.1 

130.5     , 

90 

132.0 

133-5 

!34-9 

136.4 

137.9 

139-3 

140.8 

142-3 

143-7 

145.2 

100 

146.7 

148.1 

149.6 

151.1 

152.5 

154.0 

155.5 

156.9 

158.4 

159-9 

no 

161.3 

162.8 

164.3 

165-7 

167.2 

168.7 

170.1 

171.6 

I73-I 

174-5     , 

120 

176.0 

177-5 

178.9 

180.4 

181.9 

183.3 

184.8 

186.3 

187.7 

189.2 

130 

190.7 

192.1 

193.6 

I95-I 

196-5 

198.0 

J99-5 

200.9 

202.4 

203.9 

140 

205.3 

206.8 

208.3 

209.7 

211.  2 

212.7 

214.1 

215.6 

217.1 

218.5 

TABLE   52. 


FEET    PER    SECOND    INTO    MILES    PER    HOUR. 

30 

i  foot  per  second  =  —  miles  per  hour. 
44 


Feet 
per  sec. 

0 

' 

2 

3 

4 

5 

6 

7 

8 

9 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

0 

0.0 

0.7 

1.4 

2.0 

2-7 

3-4 

4.1 

4.8 

5-5 

6.1 

10 

6.8 

7-5 

8.2 

8-9 

9-5 

10.2 

10.9 

11.  6 

12.3 

13.0 

20 

13.6 

14.3 

15-0 

15.7 

16.4 

17.0 

17.7 

18.4 

I9.I 

19.8    1 

30 

20.5 

21.  1 

21.8 

22.5 

23-2 

23-9 

24-5 

25-2 

25-9 

26.6  i 

40 

27.3 

28.0 

28.6 

29-3 

30.0 

30-7 

31-4 

32.0 

32-7 

33-4 

50 

34.1 

34-8 

35-5 

36-1 

36.8 

37-5 

38.2 

38.9 

39-5 

40.2 

60 

40.9 

41.6 

42.3 

43-o 

43-6 

44-3 

45.0 

45-7 

46.4 

47-0  i 

70 

47-7 

48.4 

49.1 

49-8 

50.5 

5i.i 

51-8 

52.5 

53-2 

53-9  • 

80 

54-5 

55.2 

55-9 

56.6 

57-3 

58.0 

58.6 

59-3 

60.0 

60.7  ! 

90 

61.4 

62.0 

62.7 

63-4 

64.1 

64.8 

65.5 

66.1 

66.8 

67-5  ! 

100 

68.2 

68.9 

69-5 

70.2 

70.9 

71.6 

72.3 

73-o 

73-6 

74-3   | 

no 

75.o 

75-7 

76.4 

77-0 

77-7 

78.4 

79.1 

79-8 

80.5 

Si.  i 

120 

81.8 

82.5 

83-2 

83-9 

84-5 

85.2 

85.9 

86.6 

87-3 

88.0 

130 

88.6 

89-3 

90.0 

90-7 

91.4 

92.0 

92.7 

93-4 

94.1 

94.8   ! 

140 

95-5 

96.1 

96.8 

97-5 

98.2 

98.9 

99-5 

IOO.2 

100.9 

101.6   i 

150 

102.3 

103.0 

103.6 

104.3 

105.0 

105-7 

106.4 

107.0 

107.7 

108.4 

160 

109.1 

109.8 

110.5 

in.  i 

in.  8 

112.5 

113.2 

II3-9 

II4-5 

115.2 

•170 

H5.9 

116.6 

H7.3 

118.0 

118.6 

II9-3 

I2O.O 

I2O.7 

121.4 

120.0 

180 

122.7 

123.4 

124.1 

124.8 

125.5 

126.1 

126.8 

127-5 

128.2 

128.9 

190 

129.5 

130.2 

130.9 

131.6 

132.3 

I33.o 

133.6 

134.3 

135-0 

135.7 

SMITHSONIAN  TABLES. 


155 


TABLE   53. 


METRES    PER    SECOND    INTO    MILES    PER    HOUR. 

i  metre  per  second  =  2.236932  miles  per  hour. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

0 

0.0 

O.  2 

0.4 

0.7 

0.9 

I.I 

1-3 

1.6 

1.8 

2.0 

i 

2.2 

2.5 

2.7 

2.9 

3-i 

3-4 

3-6 

3-8 

4.0 

4-3 

2 

4-5 

4-7 

4.9 

5-1 

5-4 

5-6 

5.8 

6.0 

6-3 

6.5 

3 

6.7 

6.9 

7.2 

7-4 

7.6 

7.8 

8.1 

8-3 

8-5 

8.7 

4 

8.9 

9-2 

9-4 

9.6 

9-8 

IO.I 

10.3 

10.5 

10.7 

II.  O 

5 

II.  2 

II.4 

ii.  6 

11.9 

12.  1 

12.3 

12.5 

12.8 

13.0 

13.2 

6 

13-4 

13.6 

13-9 

14.1 

14-3 

14-5 

14.8 

15.0 

15-2 

15-4 

7 

15-7 

!5.9 

16.1 

16.3 

16.6 

16.8 

17.0 

17.2 

17.4 

17.7 

8 

17-9 

18.1 

18.3 

18.6 

18.8 

19.0 

19.2 

19-5 

19.7 

19.9 

9 

20.1 

20.4 

20.6 

20.8 

21.  0 

21.3 

21.5 

21.7 

21.9 

22.1 

10 

22.4 

22.6 

22.8 

23.0 

23-3 

23-5 

23-7 

23.9 

24.2 

24.4 

ii 

24.6 

24.8 

25-1 

25-3 

25.5 

25-7 

25-9 

26.2 

26.4 

26.6 

12 

26.8 

27.1 

27.3 

27-5 

27.7 

28.0 

28.2 

28.4 

28.6 

28.9 

13 

29.1 

29-3 

29-5 

29.8 

30.0 

30.2 

30.4 

30.6 

30.9 

31-1 

14 

31-3 

31-5 

31.8 

32.0 

32.2 

32.4 

32.7 

32.9 

33-i 

33-3 

15 

33-6 

33-8 

34-0 

34-2 

34-4 

34-7 

34-9 

35.1 

35-3 

35-6 

16 

35-8 

36.0 

36.2 

36.5 

36.7 

36-9 

37.i 

37.4 

37.6 

37-8 

17 

38.0 

38.3 

38.5 

38.7 

38.9 

39-  1 

39-4 

39-6 

39-8 

40.0 

18 

40.3 

40.5 

40.7 

40.9 

41.2 

41.4 

41.6 

41.8 

42.1 

42-3 

19 

42.5 

42.7 

43-  ° 

43-2 

43-4 

43-6 

43-8 

44.1 

44-3 

44-5 

20 

44-7 

45-0 

45-2 

45-4 

45-6 

45-9 

46.1 

46.3 

46.5 

46.8 

21 

47.0 

47-2 

47-4 

47.6 

47.9 

48.1 

48.3 

48.5 

48.8 

49.0 

22 

49-2 

49-4 

49-7 

49-9 

50.1 

50.3 

50.6 

50.8 

51.0 

51.2 

23 

51-5 

5L7 

51-9 

52.1 

52.3 

52.6 

52.8 

53-0 

53-2 

53-5 

24 

53-7 

53-9 

54-i 

54-4 

54-6 

54-8 

55-0 

55-3 

55.5 

55-7 

25 

55-9 

56.i 

56-4 

56.6 

56.8 

57-0 

57-3 

57-5 

57.7 

57-9 

26 

58.2 

58.4 

58.6 

58.8 

59-  1 

59-3 

59-5 

59-7 

60.0 

60.2 

27 

60.4 

60.6 

60.8 

61.1 

61.3 

61.5 

61.7 

62.0 

62.2 

62.4 

28 

62.6 

62.9 

63-1 

63.3 

63.5 

63-8 

64.0 

64.2 

64.4 

64.6 

29 

64.9 

65-1 

65-3 

65.5 

65-8 

66.0 

66.2 

66.4 

66.7 

66.9 

30 

67.1 

67.3 

67.6 

67.8 

68.0 

68.2 

68.5 

68.7 

68.9 

69.1 

3i 

69-3 

69.6 

69.8 

70.0 

70.2 

70.5 

70.7 

70.9 

71.1 

71.4 

32 

71.6 

71.8 

72.0 

72.3 

72.5 

72.7 

72-9 

73-  1 

73-4 

73-6 

33 

73-8 

74.0 

74-3 

74-5 

74-7 

74-9 

75-2 

75-4 

75-6 

75-8 

34 

76.1 

76.3 

76.5 

76.7 

77.0 

77-2 

77-4 

77-6 

77-8 

78.1 

35 

78.3 

78.5 

78.7 

79.0 

79.2 

79-4 

79.6 

79-9 

80.  i 

80.3 

36 

80.5 

80.8 

81.0 

81.2 

81.4 

81.6 

81.9 

82.1 

82.3 

82.5 

37 

82.8 

83.0 

83.2 

83-4 

83-7 

84.0 

84.1 

84-3 

84.6 

84.8 

38 

85.0 

85.2 

85.5 

85.7 

85-9 

86.1 

86.3 

86.6 

86.8 

87.0 

39 

87.2 

87.5 

87.7 

87-9 

88.1 

88.4 

88.6 

88.8 

89.0 

89-3 

40 

89-5 

89.7 

89.9 

90.2 

90.4 

90.6 

90.8 

91.0 

9i-3 

9!-5 

41 

91.7 

91.9 

92.2 

92.4 

92.6 

92.8 

93-i 

93-3 

93-5 

93-7 

42 

94.0 

94.2 

94-4 

94.6 

94.8 

95-1 

95-3 

95-5 

95-7 

96.0 

43 

96.2 

96.4 

96.6 

96.9 

97-1 

97-3 

97-5 

97.8 

98.0 

98.2 

44 

98.4 

98.7 

98.9 

99.1 

99-3 

99-5 

99.8 

100.0 

IOO.2 

100.4 

SMITHSONIAN  TABLES 


156 


TABLE   53. 


METRES    PER    SECOND    INTO    MILES    PER    HOUR. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9    | 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles 

Miles  i 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr.  ; 

45 

IOO.7 

100.9 

IOI.I 

IOI.3 

IOI.6 

IOI.8 

102.0 

IO2.2 

102.5 

102.7    : 

46 

102.9 

103.1 

103-3 

103.6 

103.8 

104.0 

104.2 

104.5 

104.7 

104.9    | 

47 

I05.I 

105.4 

105.6 

105.8 

106.0 

106.3 

106.5 

106.7 

106.9 

107.2    ; 

48 

107.4 

107.6 

IO/.8 

108.0 

108.3 

108.5 

108.7 

108.9 

109.2 

109.4    | 

49 

109.6 

109.8 

IIO.  I 

II0.3 

110.5 

IIO.7 

III.O 

III.  2 

III.4 

in.  6  • 

50 

in.  8 

112.  1 

II2.3 

II2.5 

112.7 

II3.0 

II3.2 

H3-4 

113.6 

113-9 

51 

114.1 

II4-3 

II4-5 

II4.8 

115.0 

II5.2 

II5-4 

II5-7 

II5-9 

116.1   | 

52 

116.3 

116.6 

116.8 

II7.0 

117.2 

117.4 

II7.7 

117.9 

118.1 

118.3 

53 

118.6 

118.8. 

119.0 

119.2 

II9-5 

119.7 

II9.9 

1  20.  1 

120.4 

120.6    j 

54 

120.8 

121.  0 

121.3 

I2I.5 

121.7 

121.9 

122.  1 

122.4 

122.6 

122.8    j 

55 

123.0 

123.3 

123.5 

123.7 

123.9 

124.2 

124.4 

124.6 

124.8 

I25.I 

56 

125-3 

125.5 

125.7 

126.0 

126.2 

126.4 

126.6 

126.8 

I27.I 

127.3 

57 

127.5 

127.8 

128.0 

128.2 

128.4 

128.6 

128.9 

I29.I 

129.3 

129.5 

58 

129.7 

130.0 

130.2 

130.4 

130.7 

130.9 

I3I.I 

I3I.3 

I3I.6 

I3I-8 

59 

132.0 

132.2 

132-5 

132.7 

132.9 

I33-I 

J33-3 

133.6 

133-8 

134.0 

TABLE   54. 


MILES    PER    HOUR    INTO    METRES    PER    SECOND. 

i  mile  per  hour  =  0.4470409  metres  per  second. 


Miles  per 
hour. 

0 

i 

2 

3 

4 

5 

6 

7 

8 

9 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

0 

O.OO 

0-45 

0.89 

1-34 

1.79 

2.24 

2.68 

3-13 

3-58 

4.02 

10 

4-47 

4.92 

5-36 

5-81 

6.26 

6.7I 

7.15 

7.6o 

8.05 

8.49 

20 

8-94 

9-39 

9.83 

10.28 

10.73 

11.18 

11.62 

12.07 

12.52 

12.96 

30 

i3-4i 

13.86 

H-31 

14-75 

15.20 

15.65 

16.09 

16.54 

16.99 

17-43 

40 

17.88 

18-33 

18.78 

19.22 

19.67 

20.  12 

20.56 

21.  OI 

21.46 

21.90 

50 

22.35 

22.80 

23-25 

23.69 

24.14 

24.59 

25-03 

25.48 

25-93 

26.37 

60 

26.82 

27.27 

27.72 

28.16 

28.6! 

29.06 

29.50 

29.95 

30.40 

30.85 

70 

31.29 

31-74 

32.19 

32.63 

33.08 

33-53 

33.98 

34.42 

34.87 

35-32 

80 

35.76 

36.21 

36.66 

37.10 

37-55 

38.00 

38.44 

38.89 

39-34 

39-79 

90 

40.23 

40.68 

41-13 

41-57 

42.O2 

42.47 

42.92 

43.36 

43-81 

44.26 

100 

44.70 

45-15 

45.6o 

46.04 

46.49 

46.94 

47-39 

47.83 

48.28 

48.73 

IIO 

49-17 

49.62 

50.07 

50.5i 

50.96 

51.41 

51.86 

52.30 

52.75 

53-20 

120 

53-64 

54-09 

54-54 

54.98 

55-43 

55-88 

56.33 

56.77 

57-22 

57.67 

130 

58.12 

58.56 

59-01 

59-46 

59-90 

60.35 

60.80 

61.24 

61.69 

62.14 

140 

62.59 

63.03 

63.48 

63.93 

64-37 

64.82 

65-27 

65.72 

66.16 

66.61 

SMITHSONIAN  TABLES. 


157 


TABLE  55. 

METRES    PER    SECOND    INTO    KILOMETRES    PER    HOUR. 

i  metre  per  second  =  3.6  kilometres  per  hour. 


Metres  per 
second. 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0.7 

08 

0.9 

kiu. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

'  , 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr.  i 

0 

0.0 

0.4 

0.7 

I.I 

1.4 

1.8 

2.2 

2-5 

2.9 

S-2 

I 

3-6 

4.0 

4-3 

4-7 

5-0 

5-4 

5.8 

6.1 

6-5 

6.8 

2 

7.2 

7-6 

7.9 

8-3 

8.6 

9.0 

9-4 

9-7 

10.  1 

10.4 

3 

10.8 

II.  2 

H.5 

11.9 

12.2 

12.6 

13.0 

13.3 

13-7 

14.0 

4 

14.4 

14.8 

T5.I 

15.5 

15.8 

16.2 

16.6 

16.9 

I/-3 

I7.6 

5 

18.0 

18.4 

I8.7 

19.1 

19.4 

19.8 

20.2 

20.5 

20.9 

21.2    i 

6 

21.6 

22.0 

22.3 

22.7 

23.0 

23-4 

23.8 

24.1 

24-5 

24-8    i 

7 

25.2 

25-6 

25-9 

26.3 

26.6 

27.0 

27.4 

27.7 

28.1 

28.4 

8 

28.8 

29.2 

29-5 

29-9 

30.2 

30.6 

31.0 

3L3 

3r-7 

32.O 

9 

32.4 

32-8 

33-i 

33-5 

33-8 

34-2 

34-6 

34-9 

35-3 

35-6 

10 

36.0 

36.4 

36.7 

37-  r 

37-4 

37-8 

38.2 

38.5 

38.9 

39-2 

ii 

39-6 

40.0 

40.3 

40.7 

41.0 

41.4 

41.8 

42.1 

42.5 

42.8 

12 

43-2 

43-6 

43-9 

44.3 

44.6 

45.o 

45-4 

45-7 

46.1 

46.4 

13 

46.8 

47-2 

47-5 

47.9 

48.2 

48.6 

49.0 

49-3 

49-7 

50.0 

14 

50.4 

50.8 

51-1 

51-5 

5L8 

52.2 

52-6 

52.9 

53-3 

53-6 

15 

54-0 

54-4 

54-7 

55-1 

55-4 

55.8 

56.2 

56.5 

56.9 

57-2 

16 

57-6 

58.0 

58.3 

58.7 

59-0 

59-4 

59-8 

60.  i 

60.5 

60.8 

17 

61.2 

61.6 

61.9 

62.3 

62.6 

63.0 

63.4 

63-7 

64.1 

64.4 

18 

64.8 

65-2 

65.5 

65-9 

66.2 

66.6 

67.0 

67.3 

67-7 

68.0 

19 

68.4 

68.8 

69.! 

69.5 

69.8 

70.2 

7O.6 

70.9 

71-3 

71.6 

20 

72.0 

72.4 

72.7 

73-i 

73-4 

73-8 

74.2 

74-5 

74-9 

75-2 

21 

75-6 

76.0 

76.3 

76-7 

77.0 

77.4 

77-8 

78.! 

78.5 

78.8 

22 

79-2 

79-6 

79-9 

80.3 

80.6 

81.0 

8l.4 

81.7 

82.1 

82.4 

23 

82.8 

83-2 

83.5 

83-9 

84.2 

84.6 

85.0 

85.3 

85.7 

86.0 

24 

86.4 

86.8 

87.1 

87.5 

87.8 

88.2 

88.6 

88.9 

89-3 

89.6 

25 

90.0 

90.4 

90.7 

91.1 

91.4 

91.8 

92.2 

92.5 

92.9 

93-2 

26 

93.6 

94.0 

94-3 

94-7 

95-0 

95-4 

95-8 

96.1 

96.5 

96.8 

27 

97.2 

97-6 

97-9 

98.3 

98.6 

99.0 

99.4 

99-7 

100.  1 

100.4 

28 

100.8 

IOI.2 

101.5 

101.9 

102.2 

102.6 

103.0 

103.3 

103.7 

104.0 

29 

104.4 

104.8 

105.1 

105.5 

105.8 

106.2 

106.6 

106.9 

107.3 

107.6 

30 

108.0 

108.4 

108.7 

109.1 

109.4 

109.8 

1  10.  2 

110.5 

110.9 

III.  2 

3i 

in.  6 

II2.0 

112.3 

112.7 

II3.0 

113.4 

II3.8 

114.1 

II4-5 

II4.8 

32 

115.2 

II5.6 

H5.9 

116.3 

116.6 

117.0 

II7.4 

117.7 

nS.i 

II8.4 

33 

118.8 

II9.2 

II9-5 

119.9 

120.2 

120.6 

121.  0 

121.3 

121.7 

122.0 

34 

122.4 

122.8 

123.1 

123.5 

123.8 

124.2 

124.6 

124.9 

125-3 

125.6 

35 

126.0 

126.4 

126.7 

127.1 

127.4 

127.8 

128.2 

128.5 

128.9 

129.2 

36 

129.6 

130.0 

!30-3 

130.7 

131.0 

131.4 

I3I.8 

132.1 

132-5 

132.8 

37 
38 

133-2 
136.8 

133.6 
137.2 

133.9 
137-5 

134.3 
137-9 

134.6 
138.2 

135.0 
138.6 

135-4 
139.0 

135.7 
139-3 

136.1 
139-7 

136.4 
140.0 

39 

140.4 

140.8 

141.1 

I4L5 

141.8 

142.2 

142.6 

142.9 

M3-3 

143.6 

40 

144.0 

144.4 

144.7 

I45-I 

145.4 

145.8 

14.6.2 

146.5 

146.9 

147.2 

4i 

147.6 

148.0 

148.3 

148.7 

149.0 

149.4 

149.8 

150.1 

150.5 

150.8 

42 

151.2 

I5I.6 

151.9 

152.3 

152.6 

153.0 

153-4 

153-7 

i54.i 

154-4 

43 

154-8 

155.2 

155-5 

155-9 

156.2 

156.6 

157.0 

157-3 

157-7 

158.0 

44 

158.4 

158.8 

I59-I 

159-5 

159.8 

160.2 

160.6 

160.9 

161.3 

IDI.6 

SMITHSONIAN  TABLES. 


158 


TABLE  55. 
METRES    PER    SECOND    INTO    KILOMETRES    PER     HOUR. 


Metres  per 
second. 

0.0 

O.I 

02 

0.3 

0.4 

0.5 

0.6 

0.7 

0.8 

0.9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

per  hr. 

45 

162.0 

162.4 

162.7 

163.1 

163.4 

163.8 

164.2 

164.5 

164.9 

165.2 

46 

165-6 

166.0 

166.3 

166.7 

167.0 

167.4 

167.8 

I68.I 

168.5 

168.8 

47 

169.2 

169.6 

169.9 

170.3 

170.6 

I7I.O 

171.4 

I7I.7 

I72.I 

172.4 

48 

172.8 

173.2 

173-5 

173.9 

174.2 

174.6 

175-0 

1/5-3 

175-7 

176.0 

49 

176.4 

176.8 

I77.I 

177-5 

177-8 

178.2 

178.6 

178.9 

179-3 

179.6 

50 

iSo.O 

180.4 

180.7 

181.1 

181.4 

181.8 

182.2 

182.5 

182.9 

183.2 

5* 

183-6 

184.0 

184.3 

184.7 

185.0 

185.4 

185-8 

I86.I 

186.5 

1  86.  8 

52 

187.2 

187.6 

187.9 

188.3 

188.6 

189.0 

189.4 

189.7 

I90.I 

190.4 

53 

190.8 

191.2 

I9*.  5 

191.9 

192.2 

192.6 

193.0 

193-3 

193.7 

194.0 

54 

194.4 

194.8 

I95.I 

I95.5 

195.8 

196.2 

196.6 

196.9 

197.3 

197.6 

55 

198.0 

198.4 

198.7 

199.1 

199.4 

199.8 

200.2 

200.5 

2OO.9 

2OI.2 

56 

2OI.6 

2O2.O 

202.3 

202.7 

203.0 

203.4 

203.8 

204.1 

204.5 

204.8 

57 

205.2 

205.6 

205.9 

206.3 

206.6 

207.0 

207.4 

207.7 

208.  1 

208.4 

58 

208.8 

209.2 

209.5 

209.9 

2IO.2 

2IO.6 

2II.O 

211.3 

211.  7 

212.0 

59 

212.4 

212.8 

213.1 

213-5 

213.8 

214.2 

214.6 

214-9 

215-3 

215.6 

TABLE   56. 

KILOMETRES    PER     HOUR    INTO    METRES    PER     SECOND. 

10 
i  kilometre  per  hour=--  metres  per  second. 


Kilome'res 
per  hour. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

metres 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

per  sec. 

0 

O.OO 

0.28 

0.56 

0.83 

I.  II 

1.39 

1.67 

1.94 

2.22 

2.50 

10 

2.78 

3.06 

3.33 

3-6l 

3.89 

4.17 

4.44 

4.72 

5.00 

5.28 

20 

5.56 

5.83 

6.ii 

6-39 

6.67 

6.94 

7.22 

7-50 

7-78 

8.06 

30 

8.33 

8.61 

8.89 

9.17 

9-44 

9-72 

IO.OO 

10.28 

10.56 

10.83 

40 

n.  n 

n-39 

11.67 

11.94 

12.22 

12.50 

12.78 

13.06 

13-33 

13.61 

50 

13.89 

14.17 

14.44 

14.72 

15.00 

15.28 

15.56 

15.83 

16.  n 

16.39 

60 

16.67 

16.94 

17.22 

17.50 

17.78 

18.06 

18.33 

18.61 

18.89 

19.17 

70 

19.44 

19.72 

20.00 

20.28 

20.56 

20.83 

21.  II 

21.39 

21.67 

21.94 

80 

22.22 

22.50 

22.78 

23.06 

23.33 

23.61 

23.89 

24.17 

24.44 

24.72 

90 

25.00 

25.28 

25.56 

25.83 

26.11 

26.39 

26.67 

26.94 

27.22 

27.50 

100 

27.78 

28.06 

28-33 

28.61 

28.89 

29.17 

29.44 

29.72 

30.00 

30.28 

no 

30.56 

30.83 

31.11 

3L39 

31.67 

3L94 

32.22 

32-50 

32-78 

33.06 

120 

33-33 

33.6i 

33.89 

34.17 

34-44 

34-72 

35-00 

35.28 

35.56 

35.83 

130 

36.11 

36.39 

36.67 

36.94 

37-22 

37-50 

37.78 

38.06  , 

38.33 

38.61 

140 

38.89 

39-  1  7 

39.44 

39-72 

40.00 

40.28 

40.56 

40.83 

41.11 

4T-39 

150 

41.67 

41.94 

42.22 

42.50 

42.78 

43.06 

43-33 

43.61 

43.89 

44.17 

1  60 

44.44 

44.72 

45.00 

45.28 

45.56 

45.83 

46.11 

46.39 

46.67 

46.94 

170 

47-22 

47-50 

47.78 

48.06 

48.33 

48.61 

48.89 

49-17 

49.44 

49-72 

180 

50.00 

50.28 

50.56 

50.83 

51-11 

51-39 

51-67 

5L94 

52.22 

52-50 

190 

52.78 

53.06 

53-33 

53.61 

53.89 

54.17 

54-44 

54.72 

55-00 

55.28 

SMITHSONIAN  TABLES. 


159 


TABLE  57. 


BEAUFORT    SCALE    FOR    WINDS    AT    SEA. 


Force  of  wind. 

Velocity. 

Statute 
miles  per 
hour. 

Nautical 
miles  per 
hour. 

0.  —  CALM.     Full-rigged  ship,  all  sail  set,  no  headway  . 
1  —  LIGHT  AlR.     Just  sufficient  10  give  steerage  way 
2,  —  L/iGHT  BREEZE.     Speed  of   i  or  2  knots,  "lull  and 
by"  

oto    3 

13 
18 

23 
28 

34 
40 

48 
56 

65 
75 
90  and  over 

oto  2.6 
6.9 

ir-3 
15-6 

20.  o 

243 

29-5 
34-7 

41.6 

48.6 

56.4 
651 
78.  i  and  over 

3,—  GENTLE  BRKEZE.     Speed  of  3  or  4  knots,  "full  and 

by"     

4,—  MODERATE  BREEZE.     Spe^d  of  5  or  6  knots,  "full 

5  —  FRESH  BREEZE.     All  plain  sail,  "full  and  by"  

6,  —  STRONG  BREEZE.    Topgallantsails  over  single-reefed 
topsails  

1  —  MODERATE  GALE.     Double  reefed  topsails  

8,  —  FRESH    GALE.     Treble-reefed    topsails    (or    reefed 
upper  topsails  and  courses)                     

9,—  STRONG  GALE.     Close-reefed   topsails  and  courses 
(or  lower  topsails  and  courses)                      

10.  —  WHOLE     GALE.       Close-reefed    main    topsail    and 
reefed  foresail  (or  lower  main  topsail  and  reefed 
foresail)             

\  \  ,  —  STORM      Storm  staysails  

12,  —  HURRICANE      Under  bare  poles  

The  Beaufort  scale  is  commonly  used  by  seamen  for  recording  the  force 
of  wind.  The  corresponding  velocity  per  hour  in  statute  miles  and  in  nauti- 
cal miles  is  added  as  deduced  by  R.  H.  Scott,  Esq.,  in  1874. 

The  force  of  wind  varies  from  o,  a  calm,  to  12,  a  hurricane — the  greatest 
velocity  observed  at  sea.  Intermediate  forces  can  be  readily  estimated  by 
the  personal  judgment  of  seamen.  To  obtain  accurate  results  in  recording 
force  and  direction,  the  speed  and  course  of  the  vessel  must  be  considered. 


1 60 


GEODETICAL    TABLES. 

Relative  acceleration  of  gravity  at  different  latitudes     .     ,     .  TABI/E  58 

Length  of  one  degree  of  the  meridian  at  different  latitudes  .     .  TABLE  59 

Length  of  one  degree  of  the  parallel  at  different  latitudes     .     .  TABLE  60 

Duration  of  sunshine  at  different  latitudes     .     .     .     .      '.     .     .  TABLE  61 

Decimation  of  the  sun  for  the  year  1899 TABLE  62 

Mean  intensity  for  24  hours  of  solar  radiation  on  a  horizontal 

surface  at  the  top  of  the  atmosphere       .     .     .     .  t   *     . ,. .  .  TABLK  63 


161 


TABLE   58. 
RELATIVE   ACCELERATION    OF  GRAVITY  AT   DIFFERENT   LATITUDES. 

Ratio   of  the    acceleration   of   gravity  at    sea    level  for  each    10'  of    latitude,  to 
its  acceleration  at  latitude  45°. 


—  -  =  I  —  O.OO2662  COS  2d> 
£-45 

Latitude. 

0' 

10' 

20' 

30' 

40' 

50' 

0° 

0-997  338 

0-997  338 

0.997  338 

0-997  338 

0-997  339 

o-997  339 

I 

340 

340 

341 

342 

343 

344 

2 

345 

346 

347 

348 

350 

3 

353 

354 

356 

358 

362 

4 

364 

366 

368 

373 

376 

5 

0-997  378 

0.997  381 

0.997  384 

0-997  387 

0.997  390 

0.997  393 

6 

396 

399 

403 

406 

410 

413 

7 

417 

421 

425 

429 

433 

437 

8 

441 

445 

450 

454 

459 

564 

9 

468 

473 

478 

483 

488 

493 

10 

0-997  499 

0-997  504 

0.997  509 

0-997  5i5 

0.997  520 

0.997  526 

ii 

532 

538 

544 

550 

556 

562 

12 

568 

574 

58i 

587 

594 

601 

13 

607 

614 

621 

628 

635 

642 

14 

650 

657 

664 

672 

679 

687 

15 

0.997  695 

0.997  702 

0.997  710 

0-997  7I8 

0.997  726 

0-997  734 

16 

742 

75i 

759 

767 

776 

786 

18 

846 

802 
856 

8*1 

865 

819 

874 

828 
883 

837 
893 

19 

902 

912 

922 

93i 

941 

95i 

20 

21 

0.997  961 

0.998  022 

0.997971 
0.998  032 

0.997  981 
0.998  043 

0-997  99i 
0.998  053 

0.998  ooi 
064 

0.998  on 
074 

22 

085 

096 

107 

118 

129 

140 

23 

162 

185 

196 

207 

24 

2I9 

230 

242 

254 

265 

277 

25 

0.998  289 

0.998  301 

0.998  313 

0.998  325 

0.998  337 

0.998349 

26 

361 

373 

386 

398 

410 

423 

27 

435 

448 

460 

473 

486 

499 

28 

524 

537 

550 

563 

576 

29 

589 

603 

616 

629 

642 

656 

30 

0.998  669 

0.998  682 

9.998696 

0.998  709 

0.998  723 

0.998  737 

3* 

750 

764 

7/8 

79  1 

805 

819 

32 

833 

847 

861 

875 

889 

903 

33 

917 

946 

960 

974 

988 

34 

0.999003 

0.999017 

0.999032 

0.999  046 

0.999  °6o 

0-999  °75 

35 

0-999  090 

0-999  104 

0.999119 

0-999  !33 

0.999  148 

0-999  163 

36 

177 

192 

207 

222 

237 

251 

37 

266 

281 

296 

311 

326 

34i 

38 

356 

37i 

386 

401 

416 

431 

39 

447 

462 

477 

492 

507 

523 

40 

0.999538 

0-999553 

0.999  568 

0-999  584 

0.999  599 

0.999  614 

41 

-  630 

645 

660 

676 

691 

706 

42 

722 

737 

753 

768 

783 

799 

43 

814 

830 

845 

861 

876 

892 

44 

907 

923 

938 

954 

970 

985 

45 

I.OOOOOO 

1.000015 

1.000030 

1.000046 

1.000062 

1.000077 

SMITHSONIAN  TABLES. 


TABLE   58. 
RELATIVE  ACCELERATION    OF  GRAVITY  AT   DIFFERENT   LATITUDES. 

Ratio  of  the    acceleration   of   gravity  at  sea   level  for  each  10'  of   latitude,  to 
its  acceleration  at  latitude  45°. 

— ^-  =   I  —  0.002662   COS   2<£ 
£-45 


Latitude. 

0' 

\0' 

20' 

30' 

40' 

50' 

45° 

I.OOOOOO 

1.000015 

1.000030 

1.000046 

i.  ooo  062 

1.000077 

46 

093 

108 

124 

139 

155 

170 

47 

1  86 

201 

217 

232 

247 

263 

48 

278 

294 

309 

324 

340 

355 

49 

370 

386 

401 

416 

432 

447 

50 

1.000462 

1.000477 

i.  ooo  493 

i.  ooo  508 

1.000523 

i.  ooo  538 

51 

553 

569 

584 

599 

614 

629 

52 

644 

659 

674 

689 

704 

719 

53 

734 

749 

763 

778 

793 

808 

54 

823 

837 

852 

867 

881 

896 

55 

1.000910 

i.  ooo  925 

1.000940 

i.  ooo  954 

1.000968 

1.000983 

56 

0997 

I  012 

i  026 

040 

1054 

1069 

57 

1083 

1097 

i  in 

125 

H39 

H53 

58 

i  167 

i  181 

H95 

209 

I  222 

1236 

59 

i  250 

I  263 

1277 

291 

1304 

1318 

60 

i.ooi  331 

i.ooi  344 

i.ooi  358 

1.00  371 

i.ooi  384 

i.ooi  397 

61 

i  411 

1424 

1437 

450 

1463 

1476 

62 

1489 

i  501 

1514 

527 

1540 

^552 

63 

1565 

1577 

159° 

602 

I  614 

i  627 

64 

1639 

i  651 

1663 

675 

1687 

1699 

65 

i.ooi  711 

i.ooi  723 

i.ooi  735 

i.ooi  746 

i.ooi  758 

i.ooi  770 

66 

I  781 

i  793 

1804 

1815 

1827 

1838 

67 

1849 

1860 

1871 

1882 

1893 

1904 

68 

1915 

i  926 

1936 

1947 

1957 

1968 

f-  69 

1978 

1989 

1999 

2009 

2  019 

2029 

70 

1.002  039 

1.002  049 

i.  002  059 

1.002069 

I.OO2  078 

1.002088 

71 

2098 

2  IO7 

2117 

2  126 

2135 

2144 

72 

2  154 

2  163 

2  172 

2  l8l 

2  189 

2  198 

73 

2  207 

22l6 

2224 

2233 

2  241 

2  249 

74 

2258 

2266 

2274 

2282 

2  290 

2298 

75 

1.002  305 

I.0023I3 

I.00232I 

1.002  328 

1.002336 

1.002343 

76 

2350 

2358 

2365 

2372 

2379 

2  386 

77 

2393 

2399 

2406 

2413 

2419 

2  426 

78 

2432 

2438 

2444 

2450 

2456 

2462 

79 

2468 

2474 

2480 

2485 

2491 

2496 

80 

I.OO2  5OI 

1.002507 

I.OO2  512 

I.0025I7 

I.OO2  522 

1.002527 

it 

2532 

2536 

2541 

2546 

2550 

2555 

82 

2559 

2563 

2567 

2571 

2575 

2579 

83 

2583 

2587 

2590 

2594 

2597 

2601 

2  604 

2607 

26lO 

2  613 

26l6 

2  619 

85 

I.OO2  622 

I.OO2  624 

1.002  627 

1.002  629 

1.002  632 

1.002  634 

86 

2636 

2638 

2640 

2642 

2644 

2646 

87 

2647 

2649 

2650 

2652 

2653 

2654 

88 

2655 

2656 

2657 

2658 

2659 

2660 

89 

2660 

2661 

266l 

2662 

2662 

2662 

SMITHSONIAN  TABLES. 


163 


TABLE   59. 


LENGTH    OF    ONE    DEGREE    OF    THE    MERIDIAN    AT    DIFFERENT 

LATITUDES. 


Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'  of  the  Eq. 

Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'oftheEq. 

0° 

110568.5 

68.703 

59-594 

45° 

ill  132.1 

69.054 

59.898 

i 

110568.8 

68.704 

59-594 

46 

ill  151.9 

69.067 

59.908 

2 

110569.8 

68.705 

59-595 

47 

in  171.6 

69.079 

59-9*9 

3 

110571.5 

68.706 

59-596 

48 

111191.3 

69.091 

59-929 

4 

110573.9 

68.707 

59-597 

49 

111210.9 

69.103 

59-940 

5 

110577.0 

68.709 

59-598 

50 

111230.5 

69.115 

59-951 

6 

110580.7 

68.711 

59.600 

5i 

ill  249.9 

69.127 

59-961 

7 

110585.1 

68.714 

59-603 

52 

111.269.2 

69-I39 

59-972 

8 

110590.2 

68.717 

^9.606 

53 

111288.3 

69.151 

59.982 

9 

110595.9 

68.721 

59.609 

54 

m  307.3 

69.163 

59-992 

10 

110602.3 

68.725 

59.612 

55 

111326.0 

69.175 

60.002 

ii 

110609.3 

68.729 

59.616 

56 

IH344-5 

69.186 

60.012 

12 

110617.0 

68.734 

59.620 

57 

111362.7 

69.198 

60.022 

13 

110625.3 

68.739 

59-625 

58 

111380.7 

69.209 

60.032 

14 

110634.2 

68.745 

59.629 

59 

111398.4 

69.220 

60.041 

15 

110643.7 

68.751 

59-634 

60 

111415.7 

69.230 

60.051 

16 

110653.8 

68.757 

59.640 

61 

111432.7 

69.241 

60.060 

17 

110664.5 

68.763 

59.646 

62 

111449.4 

69.251 

60.069 

18 

110675.7 

68.770 

59-652 

63 

111465.7 

69.261 

60.077 

19 

110687.5 

68.778 

59-658 

64 

111481.5 

69.271 

60.086 

20 

110699.9 

68.786 

59-665 

65 

HI  497.0 

69.281 

60.094 

21 

110712.8 

68.794 

59-672 

66 

111512.0 

69.  290 

60.  1  02 

22 

110726.2 

68.802 

59-679 

67    - 

111526.5 

69.299 

60.  1  10 

23 

1  10  740.  i 

68.810 

59-686 

68 

111540.5 

69.308 

60.118 

24 

110754.4 

68.819 

59.694 

69 

in  554-1 

69.316 

60.125 

25 

110769.2 

68.829 

59-702 

70 

111567.1 

69.324 

60.132 

26 

110784.5 

68.838 

59-7io 

7i 

111579.7 

69-332 

60.139 

27 

110800.2 

68.848 

59-7I9 

72 

111591.6 

69.340 

60.145 

28 

110816.3 

68.858 

59-727 

73 

111603.0 

69.347 

60.151 

29 

110832.8 

68.868 

59-736 

74 

111613.9 

69-354 

60.157 

30 

110849.7 

68.879 

59-745 

75 

HI  624.  i 

69.360 

60.  163 

3i 

110866.9 

68.889 

59-755 

76 

HI  633.8 

69.366 

60.168 

32 

110884.4 

68.900 

59-764 

77 

HI  642.8 

69.372 

60.173 

33 

110902.3 

68.911 

59-774 

78 

HI  651.2 

69.377 

60.177 

34 

110920.4 

68.923 

59-784 

79 

HI  659.0 

69-382 

60.  182 

35 

110938.8 

68.934 

59-794 

80 

111666.2 

69-386 

60.186 

36 

110957.4 

68.946 

59.804 

81 

111672.6 

69.390 

60.189 

37 

110976.3 

68.957 

59-8I4 

82 

111678.5 

69-394 

60.192 

38 

110995.3 

68.969 

59.824 

83 

111683.6 

69-397 

60.195 

39 

111014.5 

68.981 

59-834 

84 

111688.1 

69.400 

60.  197 

40 

111033.9 

68.993 

59-845 

85 

HI  691.9 

69.402 

60.199 

4i 

111053.4 

69.005 

59-855 

86 

HI  695.0 

69.404 

60.  20  1 

42 

in  073.0 

69.017 

59-866 

87 

111697.4 

69.405 

60.202 

43 

in  092.6 

69.029 

59.876 

88 

111699.2 

69.407 

60.203 

44 

in  112.4 

69.042 

59-887 

89 

in  700.2 

69.407 

60.204 

45 

111132.1 

69-054 

59.898 

90 

111700.6 

69.407 

60.204 

SMITHSONIAN  TABLES. 


164 


TABLE   60. 

LENGTH    OF    ONE    DEGREE    OF    THE    PARALLEL   AT    DIFFERENT 

LATITUDES. 


Latitude. 

Metres. 

Statute 
Miles. 

"•SET 

1'oftheEq. 

Latitude. 

Metres. 

Statute 
Miles. 

Geographic 
Miles. 
1'  of  the  Eq. 

0° 

111321.9 

69.171 

60.000 

45° 

78850.0 

48.995 

42.498 

I 

111305.2 

69.  162 

59-991 

46 

77466.5 

48.135 

41-753 

2 

111254.6 

69-130, 

59-964 

47 

76059.2 

47.261 

40.994 

3 

111170.4 

69.078 

59.918 

48 

74628.5 

46.372 

40.223 

4 

111052.6 

69.005 

59.855 

49 

73  *74>9 

45.469 

39-440 

5 

110901.2 

68.911 

59-773 

50 

71  698.9 

44-552 

38.644 

6 

110716.2 

68.796 

59.673 

5i 

70200.8 

43.621 

37.837 

7 

110497.7 

68.660 

59.556 

52 

68681.1 

42.676 

37.018 

8 

110245.8 

68.503 

59.420 

53     ^ 

67  140.3 

41.719 

36.187 

9 

109960.5 

68.326 

59.266 

54 

65578.8 

40.749 

35-346 

10 

109641.9 

68.128 

59.095 

55 

63997.1 

39.766 

34-493 

ii 

109  290.  T 

67.909 

58.905 

56 

62395.7 

38.771 

33-630 

12 

108905.2 

67.670 

58.697 

57 

60775.1 

37-764 

32.757 

13 

108487.3 

67.411 

58.472 

58 

59135.7 

36.745 

31.873 

14 

108036.6 

67.131 

58.229 

59 

57478.1 

35.715 

30.979 

15 

I07553-I 

66.830 

57-969 

60 

55802.8 

34.674 

30.076 

16 

107037.0 

66.510 

57.690 

61 

54110.2 

33.622 

29.164 

17 

106488.5 

66.169 

57.395 

62 

52400.9 

32.560 

28.243 

18 

105  907.7 

65.808 

57.082 

63 

50675.4 

31.488 

27-313 

19 

105294.7 

65.427 

56.751 

64 

48934.3 

30.406 

26.374 

20 

104649.8 

65.026 

56.404 

65 

47  178.0 

29-3*5 

25.428 

21 

103973.2 

64.606 

56.039 

66 

45407.1 

28.215 

24-473 

22 

•  103  265.C' 

64.166 

55.657 

67 

43622.2 

27.  1  06 

23-511 

23 

102525.4 

63.706 

55-259 

68 

41  823.8 

25-988 

22.542 

24 

ioi  754.6 

63.227 

54.843 

69 

40012.4 

24.862 

21.566 

25 

100953.0 

62.729 

54.4H 

70 

38188.6 

23-729 

20.583 

26 

100  120.6 

62.212 

53.963 

7i 

36353-0 

22.589 

19-593 

27 

99257.8 

61.676 

53.498 

72 

34506.2 

21.441 

18.598 

28 

98364.8 

61.121 

53.oi6 

73 

32  648.6 

20.287 

17-597 

29 

97441.9 

60.548 

52-519 

74 

30780.9 

19.126 

16.590 

30 

96489.3 

59-956 

52.006 

75 

28  903.6 

17.960 

15.578 

31 

°55Q7-3 

59-345 

51.476 

76 

27017.4 

16.788 

14.562 

32 

94496.2 

58.717 

50.931 

77 

25  122.8 

15.611 

I3.54I 

33 

93456.3 

58.071 

50.371 

78 

23  220.4 

14.428 

12.515 

34 

92387.9 

57.407 

49-795 

79 

2I3I0.8 

13.242 

11.486 

35 

91291.3 

56.726 

49.204 

80 

19394.6 

12.051 

10.453 

36 

90166.8 

56.027 

48.598 

81 

17472.4 

10.857 

9.417 

37 

89014.8 

55-311 

47-977 

82 

15544-7 

9.659 

8.378 

38 

87835-6 

54.578 

47-341 

§3 

I36I2.2 

8.458 

7-337 

39 

86629.6 

53.829 

46.691 

84 

11675.5 

7.255 

6.293 

40 

85397.0 

53-063 

46.027 

85 

9735.1 

6.049 

5-247 

41 

84  138.4 

52.281 

45-349 

86 

7791.7 

4.841 

4.200 

42 

82  854.0 

51-483 

44-656 

87 

5845.9 

3-632 

3-I5I 

43 

81544.2 

50.669 

43-950 

88 

3898.3 

2.422 

2.  IOI 

44 

80209.4 

49.840 

43-231 

89 

I  949.4 

1.  211 

I.05I 

45 

78  850.0 

48.995 

42.498 

90 

0.0 

O.OOO 

O.OOO 

1 

SMITHSONIAN  TABLES, 


TABLE    61. 

DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°  27' 

12  7 

II  50 

II  32 

II  14 

10  55 

10  35 

10  13 

9  48 

9  19 

—  23  20 

12  7 

II  50 

II  32 

II  14 

10  56 

10  36 

10  14 

9  49 

9  20 

-23  o 

12  7 

II  50 

ii  33 

II  15 

10  57 

10  37 

10  15 

9  5i 

9  23 

-22  40 

12  7 

II  50 

ii  33 

ii  16 

10  58 

10  38 

10  17 

9  53 

9  26 

—  22  2O 

12  7 

II  51 

ii  34 

ii  17 

10  59 

10  40 

10  19 

9  55 

9  29 

—  22   O 

12  7 

II  51 

ii  34 

ii  18 

II   0 

10  41 

IO  2O 

9  58 

9  3i 

-21  40 

12  7 

II  51 

ii  35 

ii  19 

ii  i 

10  43 

10  22 

IO   O 

9  34 

—  21  20 

12  7 

II  52 

ii  35 

ii  19 

II   2 

10  44 

10  24 

IO   2 

9  37 

-  21   0 

12  7 

II  52 

ii  36 

ii  20 

ii  4 

10  46 

10  26 

10  4 

9  40 

-20  40 

12  7 

II  52 

ii  37 

II  21 

ii  5 

10  47 

10  28 

10  6 

9  42 

—  20  20 

12  7 

II  52 

ii  37 

II  22 

ii  6 

10  49 

10  29 

10  8 

9  45 

—  20   0 

12  7 

ii  53 

ii  38 

II  23 

ii  7 

10  50 

10  31 

10  II 

9  47 

-19  40 

12  7 

ii  53 

ii  38 

II  23 

ii  8 

10  51 

10  33 

10  13 

9  50 

—  19  20 

12  7 

ii  53 

ii  39 

II  24 

ii  9 

10  53 

10  35 

10  15 

9  53 

—  19  o 

12  7 

ii  53 

ii  39 

II  25 

II  10 

10  54 

10  37 

10  17 

9  55 

-18  40 

12  7 

ii  54 

ii  40 

II  26 

ii  ii 

10  55 

10  38 

10  19 

9  58 

-18  20 

12  7 

ii  54 

ii  40 

II  27 

II  12 

10  57 

10  40 

10  21 

10   I 

—  18  o 

12  7 

ii  54 

ii  41 

II  28 

II  I"3 

10  58 

10  42 

10  23 

10  3 

-17  40 

12  7 

ii  54 

ii  41 

II  28 

II  14 

10  59 

10  43 

10  26 

10  5 

—  17  20 

12  7 

ii  55 

ii  42 

II  29 

II  15 

ii  i 

10  45 

10  28 

10  8 

-17  o 

12  7 

ii  55 

ii  42 

II  30 

ii  16 

II   2 

10  47 

10  30 

IO  IO 

-16  40 

12  7 

ii  55 

ii  43 

II  3I 

ii  17 

ii  4 

10  49 

10  32 

10  13 

—  16  20 

12  7 

ii  55 

ii  43 

II  31 

ii  18 

ii  5 

10  50 

10  34 

10  16 

—  16  o 

12  7 

ii  56 

ii  44 

II  32 

ii  19 

ii  6 

10  52 

10  36 

10  18 

-15  40 

12  7 

ii  56 

ii  44 

ii  33 

II  20 

ii  8 

10  53 

10  38 

10  20 

—  15  20 

12  7 

ii  56 

ii  45 

ii  34 

II  21 

ii  9 

10  55 

10  40 

10  23 

-15  o 

12  7 

ii  56 

ii  45 

ii  34 

II  22 

II  10 

10  57 

10  42 

10  25 

-14  40 

12  7 

ii  57 

ii  46 

ii  35 

II  23 

ii  ii 

10  59 

10  44 

10  28 

—  14  20 

12  7 

ii  57 

ii  46 

ii  36 

II  25 

ii  13 

II   0 

10  46 

10  3° 

-14  o 

12  7 

ii  57 

ii  47 

ii  37 

II  26 

ii  14 

II   2 

10  48 

10  32 

-13  40 

12  7 

ii  57 

ii  47 

ii  37 

II  27 

ii  16 

ii  4 

10  50 

10  35 

-  13  20 

12  7 

ii  58 

ii  48 

ii  38 

II  28 

ii  17 

ii  5 

10  52 

10  37 

—  13  o 

12  7 

ii  58 

ii  48 

ii  39 

II  29 

ii  18 

ii  7 

10  54 

10  40 

-12  40 

12  7 

ii  58 

ii  49 

ii  40 

II  30 

ii  19 

ii  8 

10  56 

10  42 

—  12  20 

12  7 

ii  58 

ii  49 

ii  40 

II  31 

II  21 

II  10 

10  58 

10  44 

—  12   0 

12  7 

ii  58 

ii  50 

ii  41 

II  32 

II  22 

ii  ii 

II   0 

10  47 

-II  40 

12  7 

ii  59 

ii  50 

ii  42 

ii  33 

II  23 

ii  13 

II   2 

10  49 

—  ii  20 

12  7 

ii  59 

ii  5i 

ii  43 

ii  34 

II  25 

ii  15 

ii  4 

10  52 

—  II   O 

12  7 

ii  59 

ii  5i 

ii  43 

ii  35 

II  26 

ii  16 

ii  6 

10  54 

-10  40 

12  7 

ii  59 

ii  52 

ii  44 

ii  36 

II  27 

ii  18 

ii  8 

10  56 

—  10  20 

12  7 

12   0 

ii  52 

ii  45 

ii  37 

II  28 

ii  20 

II  IO 

10  59 

—  IO   O 

12  7 

12   0 

ii  53 

ii  46 

ii  38 

II  30 

II  21 

II  12 

ii  i 

-  9  40 

12  7 

12   O 

ii  53 

ii  46 

ii  39 

II  3I 

II  23 

II  14 

ii  3 

—  9  20 

12  7 

12   O 

ii  54 

ii  47 

ii  40 

II  32 

II  24 

ii  16 

ii  5 

—  9  o 

12  7 

12   I 

ii  54 

ii  47 

ii  41 

ii  34 

II  26 

ii  17 

ii  8 

-  8  40 

12  7 

12   I 

ii  55 

ii  48 

ii  42 

ii  35 

II  28 

ii  19 

II  IO 

--  8  20 

12  7 

12   I 

ii  55 

ii  49 

ii  43 

ii  36 

II  29 

II  21 

II  12 

—  8  o 

12  7 

12   I 

ii  56 

ii  50 

ii  44 

ii  37 

II  31 

II  23 

II  14 

SMITHSONIAN  TABLES. 


166 


TABLE   61. 
DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°  27' 

9  7 

853 

8  38 

8  22 

8  4 

7  44 

7  22 

6  56 

6  27 

5  52 

—  23  20 

9  8 

8  54 

8  39 

8  23 

8  5 

7  45 

7  24 

6  58 

6  29 

5  54 

-23  o 

9  ii 

8  58 

8  43 

8  28 

8  10 

7  50 

7  29 

7  4 

6  36 

6   2 

-22  40 

9  H 

9  i 

8  46 

831 

8  14 

7  55 

7  34 

7  10 

6  43 

6  9 

—  22  20 

9  17 

9  4 

8  50 

835 

8  18 

8  o 

7  39 

7  16 

6  49 

6  17 

—  22   O 

9  20 

9  7 

853 

8  38 

8  22 

8  4 

7  44 

7  22 

655 

6  25 

-21  40 

9  23 

9  10 

8  57 

8  42 

8  26 

8  9 

7  49 

7  27 

7  i 

6  32 

—  21  2O 

9  26 

9  13 

9  i 

8  46 

8  30 

8  13 

7  54 

7  32 

7  8 

6  38 

—  21   0 

9  28 

9  17 

9  4 

8  50 

8  34 

8  18 

7  59 

7  38 

7  H 

6  46 

-20  40 

9  3i 

9  20 

9  7 

853 

8  38 

8  22 

8  4 

7  43 

7  20 

6  52 

—  20  20 

9  34 

9  23 

9  ii 

8  57 

8  42 

8  26 

8  8 

7  49 

7  25 

6  59 

—  23   O 

9  37 

9  26 

9  14 

9  i 

8  46 

831 

8  13 

7  54 

7  3i 

7  5 

-19  40 

9  4o 

9  29 

9  17 

9  4 

8  50 

835 

8  18 

7  59 

7  37 

7  12 

—  19  20 

9  43 

9  32 

9  20 

9  7 

8  54 

8  39 

8  23 

8  4 

7  43 

7  18 

—  19  o 

9  46 

9  35 

9  24 

9  ii 

8  58 

8  43 

8  27 

8  9 

7  48 

7  25 

-18  40 

9  48 

9  38 

9  27 

9  15 

9  2 

8  47 

832 

8  14 

7  54 

7  3i 

-  18  20 

9  5i 

9  4i 

9  30 

9  19 

9  6 

852 

8  36 

8  19 

7  59 

7  37 

-18  o 

9  54 

9  44 

9  34 

9  22 

9  10 

8  56 

8  41 

8  24 

8  5 

7  43 

-17  40 

9  56 

9  47 

9  37 

9  25 

9  13 

9  o 

8  45 

8  29 

8  10 

7  49 

—  17  20 

9  59 

9  50 

9  40 

9  29 

9  17 

9  4 

8  50 

8  34 

8  15 

7  55 

-17  o 

IO   2 

9  53 

9  43 

9  32 

9  21 

9  8 

8  54 

8  38 

8  20 

8  i 

-16  40 

10  5 

9  56 

9  46 

9  35 

9  25 

9  12 

8  58 

8  43 

8  26 

8  6 

—  16  20 

10  7 

9  59 

9  49 

9  39 

9  28 

9  16 

9  2 

8  47 

831 

8  12 

—  16  o 

10  10 

10   I 

9  52 

9  43 

9  32 

9  20 

9  7 

8  52 

8  36 

8  17 

-15  40 

IO  12 

10  4 

9  55 

9  46 

9  35 

9  24 

9  ii 

8  57 

8  41 

8  23 

—  15  20 

10  15 

10  7 

9  58 

9  49 

9  39 

9  28 

9  15 

9  2 

8  46 

8  29 

-15  o 

10  18 

IO  IO 

10   I 

9  52 

9  43 

9  3i 

9  !9 

9  6 

851 

8  34 

-14  40 

10  20 

10  13 

10  4 

9  56 

9  46 

9  35 

9  23 

9  ii 

8  56 

8  40 

—  14  20 

10  23 

10  16 

10  7 

9  59 

9  49 

9  39 

9  28 

9  15 

9  i 

8  45 

—  14  o 

10  26 

10  19 

IO  IO 

10   2 

9  53 

9  43 

9  32 

9  19 

9  6 

8  50 

-13  40 

10  28 

10  21 

10  13 

10  5 

9  56 

9  47 

9  36 

9  24 

9  ii 

8  56 

—  13  20 

10  31 

10  24 

10  16 

10  8 

IO   O 

9  50 

9  40 

9  28 

9  16 

9  i 

-13  o 

10  33 

10  26 

10  19 

IO  II 

10  3 

9  54 

9  44 

9  33 

9  20 

9  6 

-12  40 

10  36 

10  29 

IO  22 

10  15 

10  7 

9  58 

9  48 

9  37 

9  25 

9  ii 

—  12  2O 

10  38 

10  32 

10  25 

10  18 

10  10 

IO   I 

9  52 

9  4i 

9  30 

9  17 

—  12   0 

10  41 

10  35 

10  28 

IO  21 

10  13 

10  5 

9  56 

9  46 

9  35 

9  22 

-II  40 

10  44 

10  38 

10  31 

10  25 

10  17 

10  9 

10   0 

9  50 

9  39 

9  27 

—  II  20 

10  46 

10  40 

10  34 

10  28 

IO  2O 

10  13 

10  4 

9  55 

9  44 

9  32 

—  II   O 

10  49 

10  43 

10  37 

10  31 

10  23 

10  16 

10  8 

9  59 

9  49 

9  37 

-10  40 

10  51 

10  46 

10  40 

10  34 

10  27 

10  19 

10  12 

10  3 

9  53 

9  42 

—  10  20 

10  53 

10  49 

10  43 

10  37 

10  31 

10  23 

10  16 

10  7 

9  58 

9  47 

—  10   0 

10  56 

10  51 

10  46 

10  40 

10  34 

10  27 

10  19 

IO  II 

10  3 

9  52 

-  9  40 

10  59 

10  54 

10  49 

10  43 

10  37 

10  31 

10  23 

10  16 

10  7 

9  57 

—  9  20 

ii  i 

10  56 

10  52 

10  46 

10  40 

10  34 

10  27 

10  20 

IO  II 

10   2 

-  9  o 

ii  3 

10  59 

10  55 

10  49 

10  44 

10  37 

10  31 

10  24 

10  16 

10  7 

-  8  40 

ii  6 

II   2 

10  57 

10  52 

10  47 

10  41 

10  34 

10  28 

10  20 

IO  II 

—  8  20 

ii  8 

ii  4 

II   0 

10  55 

10  50 

10  44 

10  38 

10  32 

10  25 

10  16 

-  8  o 

II  10 

ii  7 

ii  3 

10  58 

10  53 

10  48 

10  42 

10  36 

10  29 

10  21 

1 

SMITHSONIAN  TABLES. 


I67 


TABLE   61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  in. 

h.  m. 

h.  m. 

-8°  0' 

12  7 

12   I 

ii  55 

II  5° 

ii  44 

ii  37 

II  31 

II  23 

II  14 

-7  40 

12  7 

12   I 

ii  56 

II  50 

ii  45 

ii  38 

II  32 

II  25 

•II  17 

-7  20 

12-  7 

12   I 

ii  56 

II  51 

ii  46 

ii  40 

ii  34 

II  27 

II  19 

-7  o 

12  7 

12   2 

ii  57 

II  52 

ii  47 

ii  41 

ii  35 

II  29 

II  22 

-6  40 

12  7 

12   2 

ii  57 

ii  53 

ii  48 

ii  42 

ii  37 

II  31 

II  24 

—  6  20 

12  7 

12   2 

ii  58 

ii  53 

ii  49 

ii  43 

ii  38 

II  32 

II  26 

-6  o 

12  7 

12   2 

ii  58 

ii  54 

ii  50 

ii  45 

ii  40 

ii  34 

II  28 

-5  40 

12  7 

12  3 

ii  59 

ii  55 

ii  5i 

ii  46 

ii  41 

ii  36 

II  31 

-5  20 

12  7 

12  3 

ii  59 

ii  55 

ii  52 

ii  47 

ii  43 

ii  38 

ii  33 

-5  o 

12  7 

12  3 

12   O 

ii  56 

ii  53 

ii  49 

ii  44 

ii  40 

ii  35 

-4  40 

12  7 

12  3 

12   O 

ii  57 

ii  54 

ii  50 

ii  46 

ii  42 

ii  37 

—  4  20 

12  7 

12  4 

12   I 

ii  58 

ii  55 

ii  51 

ii  47 

ii  44 

ii  40 

-4  o 

12  7 

12  4 

12   I 

ii  58 

ii  56 

ii  52 

ii  49 

ii  46 

ii  42 

-3  40 

12  7 

12  4 

12   2 

ii  59 

ii  57 

ii  53 

ii  5i 

ii  47 

TI  44 

-3  20 

12  7 

12  4 

12   2 

12   0 

ii  58 

ii  55 

ii  52 

ii  49 

ii  46 

-3  o 

12  7 

12  5 

12  3 

12   I 

ii  58 

ii  56 

ii  54 

ii  5i 

ii  49 

-2  40 

12  7 

12  5 

12  3 

12   I 

ii  59 

ii  58 

ii  55 

ii  53 

ii  5i 

—  2  2O 

12  7 

12  5 

12  4 

12   9, 

12   0 

ii  59 

ii  57 

ii  55 

ii  53 

—  2   O 

12  7 

12  5 

12  4 

12  3 

12   I 

12   0 

ii  58 

ii  57 

ii  55 

-I  40 

12  7 

12  5 

12  4 

12  4 

12   2 

12   I 

12   O 

ii  59 

ii  58 

—  i  20 

12  7 

12   6 

12  5 

12  4 

12  3 

12   2 

12   2 

12   I 

12   0 

—  I   0 

12  7 

12   6 

12  5 

12  5 

12  4 

12  4 

12  3 

12   2 

12   2 

-0  40 

12  7 

12   6 

12   6 

12  5 

12  5 

12  5 

12  5 

12  4 

12   4 

—  0  20 

12  7 

12   6 

12   6 

12   6 

12   6 

12   6 

12   6 

12   6 

12   7 

0  0 

12  7 

12  7 

12  7 

12  7 

12  7 

12  7 

12   8 

12   8 

12  9 

+  0  20 

12  7 

12  7 

12  7 

12   8 

12   8 

12   8 

12   9 

12  10 

12  II 

o  40 

12  7 

12  7 

12   8 

12   8 

12  9 

12  IO 

12  II 

12  12 

12  13 

1  0 

12  7 

12  7 

12   8 

12  9 

12  IO 

12  II 

12  I3 

12  14 

12  15 

I  20 

12  7 

12   8 

12   9 

12  10 

12  II 

12  13 

12  14 

12  16 

12  17 

I  40 

12  7 

12   8 

12  9 

12  IO 

12  12 

12  14 

12  l6 

12  17 

12  2O 

2  0 

12  7 

12   8 

12  10 

12  II 

12  13 

12  15 

12  17 

12  19 

12  22 

2  2O 

12  7 

12   8 

12  10 

12  12 

12  14 

12  l6 

12  19 

12  21 

12  25 

2  40 

12  7 

12  9 

12  II 

12  13 

12  15 

12  17 

12  20 

12  23 

12  27 

3  0 

12  7 

12  9 

12  II 

12  13 

12  l6 

12  19 

12  22 

12  25 

12  29  i 

3  20 

12  7 

12  9 

12  12 

12  14 

12  17 

12  20 

12  23 

12  27 

12  31 

3  40 

12  7 

12  9 

12  12 

12  15 

12  18 

12  21 

12  25 

12  29 

12  33 

4  0 

12  7 

12  10 

12  13 

12  l6 

12  19 

12  22 

12  26 

12  31 

12  35 

4  20 

12  7 

12  IO 

12  13 

12  l6 

12  20 

12  23 

12  28 

12  32 

12  38 

4  40 

12  7 

12  IO 

12  14 

12  17 

12  21 

12  25 

12  29 

12  34 

12  40  | 

5  0 

12  7 

12  IO 

12  14 

12  18  . 

12  22 

12  26 

12  31 

12  36 

12  43  i 

5  20 

12  7 

12  IO 

12  15 

12  19 

12  23 

12  28 

12  32 

12  38 

12  45  | 

5  40 

12  7 

12  II 

12  15 

12  19 

12  24 

12  29 

12  34 

12  40 

12  47 

6  0 

12  7 

12  IT 

12  l6 

12  2O 

12  25 

12  30 

12  35 

12  42 

12  49 

6  20 

12  7 

12  II 

12  l6 

12  21 

12  26 

12  31 

12  37 

12  44 

12  52 

6  40 

12  7 

12  II 

12  l6 

12  22 

12  27 

12  32 

12  39 

12  46 

12  54 

7  0 

12  7 

12  12 

12  17 

12  22 

12  28 

12  34 

12  40 

12  48 

12  56 

7  20 

12  7 

12  12 

12  17 

12  23 

12  29 

12  35 

12  42 

12  50 

12  58 

7  40 

12  7 

12  12 

12  IS 

12  23 

12  30 

12  36 

12  43 

12  52 

13   I 

8  0 

12  7 

12  I3 

12  18 

12  24 

12  31 

12  38 

12  45 

12  53 

13   3 

SMITHSONIAN  TABLES. 


168 


TABLE  61 
DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-8°  0' 

II  II 

II  7 

ii  3 

II  58 

10  53 

10  48 

10  43 

10  36 

10  30 

IO  21 

-7  40 

II  13 

II  10 

ii  5 

II   I 

10  57 

10  52 

10  46 

10  40 

10  34 

10  26 

-7  20 

ii  16 

II  12 

ii  8 

ii  4 

II   O 

10  55 

10  50 

10  44 

10  38 

10  31 

-7  o 

ii  19 

II  15 

ii  ii 

ii  7 

ii  3 

10  59 

10  54 

10  48 

10  42 

io  35 

-6  40 

II  21 

II  17 

ii  14 

II  10 

ii  7 

II   2 

10  58 

10  52 

10  47 

10  40 

—  6  20 

II  23 

II  20 

ii  17 

ii  13 

II  10 

ii  5 

ii  i 

10  56 

10  51 

io  45 

-6  o 

II  26 

II  23 

II  20 

ii  16 

ii  13 

ii  9 

ii  5 

II   0 

10  55 

io  50 

-5  40 

II  28 

II  25 

II  23 

ii  19 

ii  16 

ii  13 

ii  8 

ii  4 

10  59 

io  55 

-5  20 

II  31 

II  28 

II  25 

II  22 

ii  19 

ii  16 

ii  13 

ii  8 

ii  4 

io  59 

-5  o 

ii  33 

II  31 

II  28 

II  25 

ii  23 

ii  19 

ii  16 

II  12 

ii  8 

ii  4 

-4  40 

ii  35 

ii  33 

II  31 

II  28 

ii  26 

ii  23 

II  20 

ii  16 

ii  13 

ii  8 

-4  20 

ii  38 

ii  36 

ii  34 

II  3I 

ii  29 

ii  26 

II  23 

II  20 

ii  17 

11  J3 

-4  o 

ii  40 

ii  38 

ii  37 

ii  34 

ii  32 

ii  30 

II  27 

II  24 

II  21 

ii  18 

-3  40 

ii  43 

ii  41 

ii  39 

ii  37 

ii  35 

ii  33 

II  3I 

II  28 

ii  26 

II  22 

-3  20 

ii  45 

ii  43 

ii  42 

ii  40 

ii  38 

ii  37 

ii  35 

II  32 

ii  3° 

II  27 

-3  o 

ii  47 

TI  46 

ii  45 

ii  43 

ii  42 

ii  40 

ii  38 

II  36 

ii  34 

II  32 

-2  40 

ii  50 

ii  49 

ii  47 

ii  46 

ii  45 

ii  44 

ii  42 

II  40 

ii  38 

ii  37 

—  2  20 

ii  52 

ii  5i 

ii  50 

ii  49 

ii  48 

ii  47 

ii  46 

ii  44 

ii  43 

ii  41 

—  2   0 

ii  55 

ii  54 

ii  53 

ii  52 

ii  52 

ii  50 

ii  49 

ii  48 

ir  47 

ii  46 

-1  40 

ii  57 

ii  56 

ii  55 

ii  55 

ii  55 

ii  54 

ii  53 

ii  52 

ii  5i 

ii  50 

—  i  20 

ii  59 

ii  59 

ii  58 

ii  58 

ii  58 

ii  57 

ii  57 

ii  56 

ii  56 

ii  55 

—  I   O 

12   2 

12   2 

12   I 

12   I 

12   I 

12   I 

12   I 

12   O 

12   0 

ii  59 

-0  40 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

—  o  20 

12  7 

12  7 

12  7 

12  7 

12  7 

12  7 

12   8 

12   8 

12   8 

12  9 

+  0  0 

12  9 

12  9 

12  10 

12  10 

12  10 

12  II 

12  II 

12  12 

12  13 

12  13 

o  20 

12  II 

12  12 

12  I3 

12  13 

12  14 

12  14 

12  15 

12  l6 

12  17 

12  18 

o  40 

12  14 

12  14 

12  15 

12  l6 

12  17 

12  17 

12  19 

12  20 

12  21 

12  23 

1   0 

12  l6 

12  17 

12  18 

12  19 

12  20 

12  21 

12  22 

12  24 

12  25 

12  27 

i  20 

12  19 

12  20 

12  20 

12  22 

12  23 

12  25 

12  26 

12  28 

12  29 

12  32 

i  40 

12  21 

12  22 

12  23 

12  25 

12  26 

12  28 

12  30 

12  S2 

12  34 

12  37 

2  0 

12  23 

12  25 

12  26 

12  28 

12  29 

12  31 

12  34 

12  36 

12  38 

12  41 

2  20 

12  26 

12  28 

12  29 

12  31 

12  32 

12  35 

12  37 

12  40 

12  43 

12  46 

2  40 

12  28 

12  30 

12  32 

12  34 

12  36 

12  38 

12  41 

12  44 

12  47 

12  50 

3  0 

12  31 

12  32 

12  35 

12  37 

12  39 

12  41 

12  44 

12  48 

12  51 

12  55 

3  20 

12  33 

12  35 

12  37 

12  40 

12  42 

12  45 

12  48 

12  52 

12  55 

13  o 

3  40 

12  35 

12  38 

12  40 

12  43 

12  46 

12  49 

12  52 

12  56 

13  o 

13  4 

4  0 

12  38 

12  40 

12  43 

12  46 

12  49 

12  52 

12  56 

13  o 

13  4 

13  9 

4  20 

12  40 

12  43 

12  46 

12  49 

12  52 

12  55 

12  59 

13  4 

13  8 

13  14 

4  40 

12  43 

12  46 

12  49 

12  52 

12  55 

12  59 

13  3 

13  8 

13  13 

13  19 

5  0 

12  45 

12  48 

12  51 

12  55 

12  58 

13   2 

13  7 

13  12 

13  17 

13  23 

5  20 

12  47 

12  51 

12  54 

12  58 

13   2 

13  6 

13  ii 

13  16 

I3  22 

13  28 

5  40 

12  50 

12  53 

12  57 

13  I 

13  5 

13  1° 

13  14 

13  20 

13  26 

13  33 

6  0 

12  53 

12  56 

12  59 

13  4 

13  8 

13  13 

13  18 

13  24 

13  31 

13  38 

6  20 

12  55 

12  59 

13   2 

13  7 

13  ii 

13  16 

13  22 

I3  28 

13  35 

13  43 

6  40 

12  58 

13  I 

13  5 

13  10 

13  14 

13  20 

13  26 

13  32 

13  39 

13  47 

7  0 

13  o 

13  4 

13  8 

13  13 

13  18 

13  23 

13  29 

13  36 

13  44 

13  52 

7  20 

13   2 

13  7 

13  ii 

13  16 

13  21 

13  27 

13  33 

13  40 

13  48 

13  57 

7  40 

13  5 

13  9 

13  14 

13  19 

13  25 

13  31 

13  37 

13  44 

13  53 

14  2 

8  0 

13  7 

13  12 

13  17 

13  22 

13  28 

13  34 

13  4i 

13  48 

13  57 

14  7 

SMITHSONIAN  TABLES. 


169 


TABLE  61. 

DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

0° 

5° 

10° 

15° 

20° 

25° 

30° 

35° 

40° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  in. 

h.  m. 

h.  m. 

+  8°  0' 

12  7 

12  13 

12  IS 

12  24 

12  3I 

12  38 

12  45 

12  53 

13  3 

8  20 

12  7 

12  13 

12  19 

12  25 

12  32 

12  39 

12  47 

12  55 

13  5 

8  40 

12  7 

12  13 

12  19 

12  26 

12  33 

12  40 

12  48 

12  57 

13  8 

9  0 

12  7 

12  13 

12  2O 

12  26 

12  34 

12  41 

12  50 

12  59   13  10 

9  20 

12  7 

12  13 

12  2O 

12  27 

12  35 

12  43 

12  52 

13  i   13  13 

9  40 

12  7 

12  14 

12  21 

12  28 

12  36 

12  44 

12  53 

13  3   13  14 

10  0 

12  7 

12  14 

12  21 

12  29 

12  37 

12  45 

12  55 

13  5   13  17 

10  20 

12  7 

12  14 

12  22 

12  29 

12  38 

12  47 

12  56 

13  7   13  19 

10  40 

12  7 

12  14 

12  22 

12  30 

12  39 

12  48 

12  58 

13   9    13  22 

II  0 

12  7 

12  15 

12  23 

12  31 

12  40 

12  49 

12  59 

13  ii   13  24 

ii  20 

12  7 

12  15 

12  23 

12  32 

12  41 

12  50 

13  1 

13  13   13  26 

ii  40 

12  7 

12  15 

12  24 

12  32 

12  42 

12  52 

13   2 

13  15  ;  13  29 

12  0 

12  7 

12  15 

12  24 

12  33 

12  43 

12  53 

13  4 

13  17  13  31 

12  2O 

12  7 

12  l6 

12  25 

12  34 

12  44 

12  55 

13  6 

13  19 

13  34 

12  40 

12  7 

12  l6 

12  25 

12  35 

12  45 

12  56 

13  8 

13  21 

13  36 

13  0 

12  7 

12  l6 

12  26 

12  35 

12  46 

12  57 

13  9 

13  23 

13  38 

13  20 

12  7 

12  l6 

12  26 

12  36 

12  47 

12  58 

13  ii 

13  25 

13  41 

13  40 

12  7 

12  17 

12  27 

12  37 

12  48 

13  o 

13  13 

13  27 

13  43 

14  0 

12  7 

12  17 

12  2/ 

12  38 

12  49 

13  I 

13  H 

13  29 

13  46 

14  20 

12  7 

12  17 

12  28 

12  39 

12  50 

13   2 

13  16 

13  31 

13  48 

14  40 

12  7 

12  17 

12  28 

12  40 

12  51 

13  4 

13  17 

13  33 

13  5i 

15  0 

12  7 

12  18 

12  29 

12  40 

12  52 

13  5 

13  19 

13  35 

13  53 

15  20 

12  7 

12  IS 

12  29 

12  41 

12  53 

13  7 

I3  21 

13  37 

13  56 

15  40 

12  7 

12  18 

12  30 

12  41 

12  54 

13  8 

13  23 

13  39 

13  58 

16  0 

12  7 

12  19 

12  30 

12  42 

12  55 

13  9 

13  25 

13  4i 

14  i 

16  20 

12  7 

12  19 

12  31 

12  43 

12  56 

13  ii 

13  26 

13  43 

14  3 

16  40 

12  7 

12  19 

12  3I 

12  44 

12  58 

13  12 

13  28 

13  45 

14  6 

17  0 

12  7 

12  19 

12  32 

12  45 

12  59 

13  13 

13  29 

13  47 

14  8 

17  20 

12  7 

12  23 

12  32 

12  46 

13   0 

13  15 

13  31 

13  50 

14  ii 

17  40 

12  7 

12  20 

12  33 

12  46 

13  I 

13  16 

13  33 

13  52 

14  14 

18  0 

12  7 

12  20 

12  33 

12  47 

13   2 

13  17 

13  35 

13  54 

14  16 

18  20 

12  7 

12  20 

12  34 

12  48 

13  3 

13  19 

13  37 

13  56 

14  19 

18  40 

12  7 

12  21 

12  34 

12  49 

13  4 

13  20 

13  38 

13  58 

14  22 

19  0 

12  7 

12  21 

12  35 

12  50 

13  5 

13  22 

13  40 

14  o 

14  24 

19  20 

12  7 

J2  21 

12  35 

12  51 

13  6 

13  23 

13  42 

14   2 

14  26 

19  40 

12  7 

12  22 

12  36 

12  52 

13  7 

13  25 

13  44 

14  5 

14  29 

20  0 

12  7 

12  22 

12  36 

12  52 

13  8 

13  26 

13  46 

14  7 

14  32 

20  20 

12  7 

12  22 

12  37 

12  53 

13  10 

I3  28 

13  47 

14  10 

14  35 

20  40 

12  7 

12  22 

12  37 

12  54 

13  II 

13  29 

13  49 

14  12 

14  37 

21  0 

12  7 

12  23 

12  38 

12  55 

13  12 

13  31 

13  5i 

14  14 

14  40 

21  2O 

12  7 

12  23 

12  39 

12  56 

13  13 

13  32 

13  53 

14  16 

14  43 

21  40 

12  7 

12  23 

12  39 

12  56 

13  14 

13  34 

13  55 

14  19 

14  46 

22  0 

12  7 

12  24 

12  40 

12  57 

13  16 

13  35 

13  56 

14  21 

14  49 

22  20 

12  7 

12  24 

12  41 

12  58 

13  17 

13  37 

13  58 

14  23 

14  52 

22  40 

12  7 

12  24 

12  41 

12  59 

13  18 

13  38 

14  o 

14  25 

14  54 

23  0 

12  7 

12  25 

12  42 

13  o 

13  19 

13  40 

14   2 

14  28 

14  57 

23  20 

12  7 

12  25 

12  42 

13  I 

13  20 

13  4i 

14  4 

14  30 

15  o 

23  27 

12  7 

12  25 

12  43 

13  I 

13  20 

13  4i 

14  5 

14  31 

15  i 

SMITHSONIAN  TABLES. 


170 


TABLE  61 
DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

42° 

44° 

46° 

48° 

50° 

52° 

54° 

56° 

58° 

60° 

h.  m. 

h.  m. 

h  m 

h  m 

h.  m 

h  m 

h  m 

h  m 

h  in 

Ii  m. 

+  8°  0' 

13  7 

13  12 

13  17 

13  22 

13  28 

13  34 

13  41 

13  49 

13  58 

14  7 

8  20 

13  i° 

13  14 

13  20 

13  25 

13  31 

13  38 

13  45 

13  53 

14   2 

14  12 

8  40 

13  12 

13  17 

13  23 

13  28 

13  34 

13  4i 

13  49 

13  57 

14  6 

14  17 

9  0 

13  15 

13  20 

13  25 

13  31 

13  38 

13  45 

13  53 

H  i 

14  ii 

14  22 

9  20 

13  17 

13  23 

13  28 

13  34 

13  41 

13  49 

13  56 

14  5 

14  15 

14  26 

9  40 

13  20 

13  25 

13  31 

13  38 

13  44 

13  52 

14  o 

14  10 

14  20 

14  31 

10  0 

13  22 

13  28 

13  34 

13  41 

13  48 

13  56 

14  4 

14  14 

14  25 

14  36 

10  20 

13  25 

13  31 

13  37 

13  44 

13  5i 

13  59 

14  8 

14  18 

14  29 

14  4i 

10  40 

I3  28 

13  34 

13  4° 

13  47 

13  55 

H  3 

14  12 

14  22 

14  34 

14  47 

M  0 

13  30 

13  36 

13  43 

13  50 

13  58 

14  7 

14  16 

14  27 

14  38 

14  52 

ii  20 

13  32 

13  39 

13  46 

13  53 

14  i 

14  10 

14  20 

14  31 

14  43 

14  57 

ii  40 

13  35 

13  4i 

13  49 

13  56 

14  5 

14  14 

14  24 

14  35 

14  48 

15   2 

12  0 

13  38 

13  44 

13  52 

14  o 

14  8 

14  18 

14  28 

14  40 

14  53 

15  8 

12  2O 

13  40 

13  47 

13  55 

14  3 

14  12 

14  22 

14  32 

14  44 

14  58 

15  13 

12  40 

13  43 

13  50 

13  58 

14  6 

14  16 

14  25 

14  37 

14  49 

15   2 

15  18 

13  0 

13  46 

13  53 

14  i 

14  10 

14  19 

14  29 

14  4i 

14  53 

15  7 

15  23 

13  20 

13  48 

13  56 

14  4 

14  13 

14  22 

14  33 

14  45 

14  58 

15  13 

15  29 

13  40 

13  50 

13  58 

14  7 

14  16 

14  26 

14  37 

14  49 

15   2 

15  17 

15  35 

14  0 

13  53 

H  i 

14  10 

H  19 

14  29 

14  41 

14  53 

15  7 

15  22 

15  4o 

14  20 

13  56 

14  4 

14  13 

14  23 

14  33 

14  45 

14  57 

15  ii 

15  28 

15  46 

14  40 

13  59 

14  7 

14  16 

14  26 

14  37 

14  49 

15   2 

15  16 

15  33 

15  5i 

15  0 

14  i 

14  10 

14  19 

14  29 

14  40 

14  52 

15  6 

15  21 

15  38 

15  57 

15  20 

14  4 

14  13 

14  22 

14  33 

14  44 

14  56 

15  10 

15  26 

15  43 

16  2 

15  40 

14  7 

14  16 

14  26 

1436 

14  48 

15   0 

15  14 

15  30 

15  48 

16  8 

16  0 

14  10 

14  19 

14  29 

14  40 

14  52 

15  4 

15  19 

15  35 

15  53 

16  14 

16  20 

14  12 

14  22 

14  32 

14  43 

H  55 

15  8 

15  23 

15  40 

15  59 

16  20 

16  40 

14  15 

14  25 

14  35 

14  46 

H  59 

15  13 

15  28 

15  45 

16  4 

16  26 

17  0 

14  17 

14  28 

14  38 

14  50 

15  3 

15  17 

15  32 

15  50 

16  10 

16  32 

17  20 

14  20 

14  31 

14  4i 

14  53 

15  7 

15  21 

15  37 

15  55 

16  15 

16  38 

17  40 

14  23 

14  34 

14  45 

14  57 

15  10 

15  25 

15  4i 

16  o 

16  20 

1  6  45 

18  0 

14  26 

14  37 

14  48 

15  i 

15  14 

15  29 

15  46 

16  5 

16  26 

16  51 

18  20 

14  29 

14  40 

14  52 

15  4 

15  18 

15  34 

15  50 

16  10 

16  32 

16  58 

18  40 

14  32 

14  43 

14  55 

15  8 

15  22 

15  38 

15  55 

16  15 

16  38 

17  4 

19  0 

14  35 

14  46 

1458 

15  ii 

15  26 

15  42 

16  o 

16  20 

16  44 

17  ii 

19  20 

14  37 

14  49 

15  i 

15  15 

15  30 

15  46 

16  5 

16  25 

16  50 

17  17 

19  40 

14  40 

14  52 

15  5 

15  19 

15  34 

15  5i 

16  10 

16  31 

16  56 

17  24 

20  0 

H  43 

14  55 

15  8 

15  22 

15  38 

15  55 

16  15 

16  37 

17  2 

17  31 

20  20 

U  46 

14  58 

15  ii 

15  26 

15  42 

16  o 

16  20 

16  42 

17  8 

17  38 

2O  40 

14  49 

15   2 

15  15 

15  30 

15  46 

16  4 

16  25 

16  47 

17  14 

17  46 

21  0 

14  52 

15  5 

15  19 

15  34 

15  50 

16  9 

16  30 

16  53 

17  20 

17  53 

21  2O 

14  55 

15  8 

15  22 

15  38 

15  55 

16  13 

16  35 

16  59 

17  27 

18  i 

21  40 

14  58 

15  ii 

15  26 

15  42 

15  59 

16  18 

16  40 

17  5 

17  34 

18  8 

22  0 

15  i 

15  14 

15  29 

15  46 

16  3 

16  23 

16  45 

17  ii 

17  40 

18  16 

22  2O 

15  4 

15  18 

15  33 

15  49 

16  7 

16  28 

16  50 

17  17 

17  47 

18  24 

22  40 

15  7 

15  22 

15  37 

15  53 

16  12 

16  32 

16  56 

17  23 

17  54 

18  32 

23  0 

15  10 

15  25 

15  40 

15  57 

16  16 

16  37 

17  i 

17  29 

18  i 

18  41 

23  20 

15  13 

15  28 

15  44 

16  i 

16  21 

16  42 

17  7 

17  35 

18  8 

18  49 

23  27 

15  14 

15  29 

15  46 

16  3 

16  23 

16  44 

17  9 

17  37 

18  ii 

18  52 

SMITHSONIAN  TABLES. 


171 


TABLE   61. 

DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
ihe  Sun. 

LATITUDE  NORTH. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69° 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-23°27/ 

5  52 

5  31 

5    8 

442 

4  II 

334 

2  46 

I  29 

—  23   20 

5  55 

534 

5  12 

446 

4  16 

340 

253 

I  41 

-  23     o 

6     2 

543 

52i 

456 

428 

353 

3  ii 

2  II 

-22  40 

6  10 

55i 

530 

5    6 

439 

4    7 

327 

235 

059 

—  22     20 

617 

559 

539 

5i6 

450 

4  20 

343 

256 

143 

—  22       0 

625 

6    7 

5  47 

5  25 

5    i 

432 

358 

3  14 

2  I3 

-21    40 

632 

6  14 

556 

5  34 

5  ii 

443 

4  ii 

33i 

238 

I      I 

—  21     20 

639 

622 

6    4 

543 

520 

455 

424 

3  47 

259 

i  45 

—  21       0 

646 

6  29 

612 

5  52 

530 

5    5 

436 

4    i 

318 

2  16 

-20  40 

652 

637 

6  20 

6    i 

540 

5i6 

448 

4  16 

335 

241 

I     2 

—  20  20 

659 

644 

627 

6    9 

549 

526 

459 

429 

35i 

3    2 

147 

—  20     o 

7    5 

651 

634 

617 

558 

535 

5  10 

44i 

4    6 

3  22 

2  I9 

-19    40 

7  12 

658 

6  42 

625 

6    6 

545 

521 

453 

4  20 

339 

244 

—  19   20 

7i8 

7    4 

649 

633 

614 

554 

53i 

5    5 

434 

355 

3    6 

—  19     o 

7  25 

7  ii 

656 

6  41 

623 

6    3 

54i 

5i6 

447 

4  ii 

326 

-18   40 

73i 

717 

7    4 

648 

631 

6  12 

55i 

526 

459 

425 

344 

-  IS     20 

737 

7  24 

710 

655 

639 

6  20 

6    i 

537 

5  ii 

439 

4    i 

—  18     o 

7  43 

7  3i 

7  17 

7    3 

647 

6  29 

6  10 

547 

522 

452 

4  16 

-17    40 

749 

737 

724 

7  10 

655 

638 

619 

557 

533 

5    5 

43i 

—  17     20 

7  55 

743 

73i 

7  17 

7    2 

646 

628 

6    7 

543 

5  17 

445 

-  17     o 

8    i 

749 

737 

7  24 

7    9 

653 

636 

616 

554 

528 

458  | 

-16   40 

8    6 

755 

744 

73i 

7  17 

7    i 

644 

626 

6    4 

5  40 

5  ii 

—  16   20 

8  12 

8    i 

750 

738 

724 

7    9 

652 

635 

6  14 

55i 

523 

—  16     o 

817 

8    7 

756 

744 

73i 

7  17 

7    i 

644 

6  24 

6     2 

535 

-15    40 

823 

813 

8     2 

75i 

738 

7  25 

7    9 

652 

634 

612 

547 

—  15     20 

8  29 

8  19 

8    8 

758 

745 

732 

7  17 

7    i 

643 

622 

559 

-  15     o 

834 

825 

815 

8    4 

752 

739 

7  25 

7    9 

652 

632 

6  10 

-14   40 

340 

831 

821 

8  10 

759 

746 

732 

7  17 

7    i 

6  42 

6  20 

—  14    20 

845 

836 

827 

817 

8    5 

753 

740 

726 

7  10 

651 

631 

—  14     o 

850 

842 

833 

823 

8  12 

8    i 

747 

734 

718 

7    i 

6  41 

-13    40 

856 

847 

838 

8  29 

8  19 

8    7 

755 

74i 

726 

7  10 

651 

—  13     20 

9    i 

853 

844 

835 

825 

8  14 

8     2 

749 

735 

7  19 

7    i 

-  13     o 

9    6 

858 

850 

841 

832 

821 

8  10 

757 

743 

728 

7  10 

-12    40 

9  ii 

9    4 

856 

847 

838 

828 

817 

8    5 

75i 

737 

7  20 

—  12     2O 

9  *7 

9  10 

9    2 

853 

844 

834 

8  24 

812 

759 

745 

7  29 

—  12       O 

922 

9  15 

9    7 

859 

850 

841 

831 

8  20 

8    7 

753 

738 

-II    40 

927 

9  20 

913 

9    5 

856 

847 

838 

827 

815 

8     2 

747 

—  ii    20 

932 

925 

919 

911 

9    3 

854 

844 

834 

823 

8  10 

756 

—  II       O 

937 

93i 

924 

917 

9    9 

9    o 

851 

841 

831 

818 

8    5 

-10    40 

942 

936 

929 

922 

9  !5 

9    7 

858 

849 

838 

826 

8  14 

—  10   20 

947 

941 

935 

928 

9  21 

913 

9    5 

856 

846 

834 

822 

—  IO       O 

952 

946 

940 

934 

927 

9  J9 

9H 

9    3 

853 

842 

831 

-   9    40 

957 

95i 

946 

940 

933 

9  26 

9  18 

9  10 

9    o 

850 

839 

—    9   20 

10     2 

956 

95i 

945 

939 

932 

925 

9  16 

9    8 

858 

847 

-    9     o 

10    7 

IO     2 

956 

950 

944 

938 

93i 

923 

915 

9    5 

855 

-   8    40 

IO  II 

10    7 

10     2 

956 

950 

944 

937 

930 

922 

913 

9    3 

-     8     20 

10  16 

IO  12 

10    7 

10     2 

956 

950 

944 

937 

929 

921 

911 

-    8     o 

IO  21 

10  17 

10  12 

10    7 

10     2 

956 

950 

943 

936 

928 

919 

SMITHSONIAN  TABLES 


172 


TABLE   61 
DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

71° 

72° 

73° 

74° 

75° 

76° 

77° 

78° 

79° 

80° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  111. 

h.  m. 

h.  m. 

li.  m. 

h.  m. 

h.  m. 

-23°27/ 

-  23     20 

-23     o 

-22  40 

—  22     20 

—  22       0 

-21  40 

—  21     2O 

—  21       O 

-20  40 

—  20    20 

—  2O       O 

-19   40 

I      3 

—  19    20 

I   50 

—  19     o 

2   22 

-18  40 

-  18   20 
—  18     o 

2  47 
3  10 
3  30 

i  5 
i  52 

2  25 

-17  40 

—  17     20 

3  49 
4    6 

2  52 

3  14 

I     6 

i  55 

—  17     o 

4  22 

3  35 

2    29 

-16  40 

—  16  20 
—  16     o 

4  37 
4  52 
5    6 

3  54 
4  12 
4  28 

256 

3  20 
3  4i 

i  8 
i  58 

2  32 

-15  40 

5  19 

4  44 

4    i 

3  i 

I   10 

—  15     20 

-15     o 

5  32 
5  44 

4  59 
5  13 

4  19 
4  36 

3  25 

3  47 

2      2 

2  37 

-14  40 

—  14  20 
-14     o 

556 
6    8 
6  19 

5  27 
5  40 
5  52 

4  52 
5    7 
5  21 

4  7 
4  26 

4  43 

3    6 
3  3i 
3  54 

I    13 

2      5 
2   42 

-13  40 

—  13    20 

-13     o 

6  29 
6  40 
651 

6  5 
6  17 
6  29 

5  35 

5  49 

6      2 

5  o 
5  16 
5  3i 

4  14 
4  34 
4  52 

3  12 
3  38 
4    2 

I   15 

2    10 
2   48 

-12  40 

—  12     2O 
—  12       0 

6     i 

7  H 
7  21 

6  40 
6  50 

7  i 

6  15 
6  27 
6  39 

5  45 
5  59 
6  13 

5    9 
5  25 
5  4i 

4  23 
4  43 
5     2 

3    19 

3  46 
4  10 

i  18 

2    15 

2  55 

-II    40 

—  ii    20 

—  II       O 

7  3i 
7  40 
7  50 

7  12 
7  23 
7  33 

651 

7    3 
7  14 

6  26 
6  38 
6  51 

556 
6  ii 
625 

5  19 

5  38 
5  54 

4  32 
4  53 
5  13 

3  27 
3  55 
4  20 

I    21 
2   20 

3     2 

-10  40 

—  10    20 
—  IO       O 

7  59 
8    8 
8  17 

7  43 
7  53 
8  3 

7  25 
7  35 
7  46 

7  3 
7  15 
7  27 

6  34 
6  52 
7    4 

6'9 

6  23 

638 

5  3i 

ii 

4  43 
5    5 
5  25 

3  35 
4    5 
4  31 

I    25 
2   27 

3  10 

-   9  40 

-    9   20 
-    9     o 

8  26 

835 
8  44 

8  13 

8  22 
831 

756 
8    7 
8  17 

738 
7  50 
8  i 

7  17 
7  29 
7  4i 

652 
7    6 
7  20 

6    22 

6  38 
653 

5  44 
6    3 

6  21 

4  56 
5  19 
5  40 

3  46 
4  17 

4  44 

-   8  40 

—     8    20 

-    8     o 

853 
9     i 
9  10 

8  41 
8  50 
8  59 

827 

837 
847 

8  ii 

8  22 

833 

7  53 
8    5 
8  17 

7  33 
7  46 
7  59 

7    8 

7    22 
736 

6  38 
6  55 
7  ii 

6    o 
6  19 
6  38 

5  10 
5  34 
5  56 

SMITHSONIAN  TABLES. 


173 


TABLE   61. 

DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 

LATITUDE  NORTH. 

of 

the  Sun. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69r 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h  m 

h  m 

h.  m 

h  in 

Ii  m 

-8°  0' 

10  21 

10  17 

IO  12 

10  7 

IO  2 

956 

950 

943 

936 

9  28 

9  19 

-7  40 

10  26 

10  22 

10  17 

10  13 

10  8 

IO  2 

956 

950 

943 

935 

927 

—  7  20 

1031 

10  27 

1023 

10  18 

10  13 

10  8 

10  3 

957 

950 

943 

935 

-7   o 

1035 

1032 

1028 

10  23 

10  19 

10  14 

10  9 

10  4 

957 

950 

943 

--6  40 

10  40 

1037 

1033 

10  29 

10  25 

10  20 

10  15 

10  10 

10  4 

957 

95i 

—  6  20 

1045 

10  42 

10  38 

1034 

1031 

10  26 

10  22 

10  16 

10  II 

10  5 

958 

-6   o 

1050 

1047 

1043 

1040 

1036 

1032 

10  28 

1023 

10  18 

10  12 

10  6 

-5  40 

1055 

1052 

1049 

1045 

1041 

1038 

1034 

10  29 

10  25 

10  19 

10  14 

-5  20 

1059 

10  56 

10-54 

1050 

1047 

1044 

10  40 

1036 

1031 

10  26 

IO  21 

-5   o 

ii  4 

II  I 

1059 

1056 

1053 

1050 

10  46 

10  42 

1038 

1034 

10  29 

-4  40 

ii  8 

ii  6 

ii  4 

ii  i 

1058 

1055 

1052 

1049 

1045 

1041 

1036 

—  4  20 

ii  13 

ii  ii 

ii  9 

ii  7 

ii  4 

II   I 

1058 

1055 

1052 

1048 

1044 

-4   o 

ii  18 

ii  16 

ii  14 

II  12 

II  10 

ii  7 

ii  4 

ii  i 

1058 

1055 

1051 

-3  40 

II  22 

II  21 

ii  19 

II  17 

II  15 

ii  13 

II  IO 

ii  8 

ii  5 

II   2 

1059 

-3  20 

II  27 

II  26 

ii  24 

II  22 

II  20 

ii  19 

ii  16 

ii  14 

ii  ii 

ii  9 

ii  6 

-3   o 

II  32 

1131 

ii  29 

II  28 

II  26 

ii  24 

II  22 

II  20 

ii  18 

ii  16 

ii  13 

-2  40 

H37 

1135 

ii  34 

1133 

II  31 

ii  30 

II  28 

II  27 

ii  25 

ii  23 

II  21 

—  2   2O 

II  41 

II  40 

H39 

II38 

ii  37 

ii  36 

ii  34 

H33 

ii  32 

ii  30 

II  28 

—  2   0 

II  46 

ii  45 

ii  44 

H43 

ii  43 

ii  41 

ii  40 

II  40 

1138 

H37 

ii  35 

-1  40 

II  50 

ii  50 

H49 

ii  49 

ii  48 

ii  47 

ii  46 

II  46 

ii  45 

ii  44 

ii  43 

—  i  20 

ii  55 

ii  55 

ii  54 

ii  54 

ii  53 

ii  53 

ii  52 

II52 

1152 

ii  5i 

ii  £50 

—  I    O 

ii  59 

H59 

H59 

H59 

ii  59 

-ii  59 

ii  58 

II  58 

ii  58 

ii  58 

ii  58 

-0  40 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  4 

12  5 

12  5 

12  5 

—  o  20 

12  9 

12  9 

12  9 

12  10 

12  IO 

12  10 

12  10 

12  II 

12  II 

12  12 

12  12 

0  0 

12  13 

12  14 

12  14 

12  15 

12  15 

12  l6 

12  l6 

12  17 

12  18 

12  19 

12  19 

-f-o  20 

12  18 

12  19 

12  19 

12  20 

12  2O 

12  22 

12  22 

I223 

12  25 

12  26 

I227 

o  40 

12  22 

I223 

12  24 

12  25 

12  26 

12  27 

12  28 

12  29 

I23I 

12  33 

1234 

1   0 

12  27 

12  28 

12  29 

1231 

1232 

1233 

1234 

12  36 

1238 

12  40 

12  41 

I   20 

1232 

1233 

1234 

12  36 

1237 

1239 

12  40 

12  42 

1244 

1247 

1249 

I  4O 

1237 

1238 

1239 

12  41 

1243 

1244 

12  46 

1249 

1251 

12  54 

12  56 

2  0 

12  41 

12  43 

1244 

12  46 

12  48 

12  50 

1252 

1255 

1258 

13  i 

13  4 

2   2O 

12  46 

1247 

1249 

12  52 

1253 

12  56 

1259 

13   I 

13  4 

13  8 

13  ii 

2  40 

12  50 

12  52 

12  54 

1257 

1259 

I3  2 

13  5 

13  7 

13  ii 

13  15 

13  19 

3  0 

1255 

1257 

1259 

I3   2 

13  5 

13  8 

13  ii 

13  14 

13  17 

1322 

13  26 

3  20 

13  o 

I3  2 

13  5 

13  7 

13  10 

13  13 

13  17 

13  20 

1324 

1329 

1334 

3  4o  ' 

13  4 

13  7 

13  10 

13  13 

13  16 

1319 

13  23 

1327 

i33i 

1336 

i34i 

4  0 

13  9 

I3  12 

13  15 

13  18 

13  22 

13  25 

13  29 

1-333 

1338 

1343 

1349 

4  20 

13  M 

13  17 

13  20 

13  23 

13  27 

1331 

1335 

1340 

1345 

1350 

1356 

4  40 

1319 

1322 

13  25 

13  29 

1332 

1337 

I34i 

1346 

1352 

1358 

14  4 

5  0 

1323 

1327 

1330 

13  34 

1338 

1343 

1347 

1353 

1358 

14  5 

14  ii 

5  20 

1328 

1332 

1335 

13  40 

1344 

1349 

1354 

1359 

14  5 

14  12 

14  19 

5  40 

1333 

1337 

1341 

1345 

1350 

1355 

14  o 

14  6 

14  12 

14  19 

1427 

6  0 

1338 

1342 

1346 

1350 

1355 

14  I 

14  6 

1413 

14  19 

14  26 

1435 

6  20 

1343 

1347 

13  51 

13  56 

H  I 

14  7 

14  12 

14  19 

14  26 

H34 

1443 

6  40 

1347 

1352 

1356 

14  i 

14  7 

14  13 

14  18 

14  26 

1433 

1442 

i45i 

7  0 

1352 

1357 

14  I 

14  7 

14  12 

14  19 

1425 

1432 

1440 

1449 

1459 

7  20 

1357 

14  2 

14  7 

14  13 

14  18 

1425 

i43i 

1439 

1448 

1457 

15  7 

7  40 

14  2 

14  7 

14  12 

14  18 

1424 

i43i 

1438 

1446 

1455 

15  4 

15  15 

8  0 

14  7 

14  12 

1417 

1423 

1430 

1437 

1445 

H52 

15  2 

15  12 

15  23 

SMITHSONIAN  TABLES. 


174 


TABLE  61. 
DURATION    OF   SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

71° 

72° 

73° 

74° 

75° 

76° 

77° 

78° 

79° 

80° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

-8°  0' 

9  10 

8  59 

8  47 

833 

8  17 

758 

7  37 

7  io 

6  38 

5  56 

-740 

9  18 

9  08 

8  56 

843 

8  28 

8  ii 

7  50 

7  26 

6  56 

6  18 

-7  20 

9  26 

9  17 

96 

853 

8  39 

8  23 

8  4 

7  4i 

7  14 

6  38 

9  35 

9  26 

9  16 

9  3 

8  50 

835 

8  17 

756 

7  31 

6  58 

-640 

9  43 

'  9  34 

9  25 

9  14 

9  i 

8  47 

8  30 

8  ii 

7  47 

7  17 

—  6  20 

9  51 

9  43 

9  34 

9  24 

9  12 

8  59 

8  43 

825 

8  3 

7  36 

-6  o 

9  59 

9  52 

9  43 

9  34 

9  23 

9  ii 

8  56 

8  39 

8  19 

7  54 

-540 

10  7 

10   I 

9  53 

9  44 

9  34 

9  22 

9  9 

853 

8  34 

8  ii 

—  5  20 

10  15 

10  9 

IO   2 

9  53 

9  44 

9  34 

9  22 

9  7 

8  50 

8  28 

—  5  o 

10  23 

10  17 

10  II 

io  3 

9  55 

9  45 

9  34 

9  20 

9  5 

8  46 

-440 

10  31 

10  26 

10  20 

io  13 

io  5 

9  56 

9  46 

9  34 

9  19 

9  2 

—  4  20 

10  39 

io  34 

io  29 

10  22 

io  15 

io  7 

9  58 

9  47 

9  34 

9  18 

-4  o 

10  47 

10  43 

io  38 

io  32 

io  26 

io  18 

10  10 

10   0 

9  49 

9  34 

-340 

10  55 

io  51 

io  46 

io  41 

io  36 

io  29 

10  22 

io  13 

io  3 

9  50 

-3  20 

ii  3 

io  59 

io  55 

io  51 

io  46 

io  40 

io  34 

io  26 

io  17 

io  6 

ii  ii 

ii  8 

ii  4 

II   0 

io  56 

io  51 

io  45 

io  39 

io  31 

10  22 

-240 

ii  19 

ii  16 

ii  13 

II  10 

ii  6 

II   2 

io  57 

io  52 

io  45 

io  37 

—  2  20 

ii  26 

ii  24 

II  22 

II  19 

ii  16 

II  13 

ii  8 

ii  4 

io  59 

io  52 

—  2   O 

ii  34 

ii  32 

II  31 

II  28 

ii  26 

II  23 

II  20 

ii  17 

ii  13 

ii  8 

-1  40 

ii  42 

ii  41 

ii  39 

II  38 

ii  36 

ii  34 

II  32 

ii  29 

ii  26 

ii  23 

—  I  20 

ii  49 

ii  49 

ii  48 

ii  47 

ii  46 

ii  45 

ii  43 

ii  42 

ii  40 

ii  38 

—  I   0 

ii  57 

ii  57 

Ii  56 

ii  56 

ii  56 

ii  55 

ii  55 

ii  55 

ii  54 

ii  53 

-040 

12  5 

12  5 

12  5 

12  5 

12   6 

12   6 

12  7 

12  7 

12   8 

12   8 

—  o  20 

12  13 

12  13 

12  14 

12  15 

12  l6 

12  17 

12  18 

12  20 

12  21 

12  23 

0  0 

12  2O 

12  22 

12  22 

12  24 

12  26 

12  28 

12  29 

12  32 

12  35 

12  38 

+  0  20 

12  28 

12  30 

12  3I 

12  34 

12  36 

12  38 

12  41 

12  44 

12  49 

12  53 

o  40 

12  36 

1.2  38 

12  40 

12  43 

12  46 

12  49 

12  53 

12  57 

13   2 

13  9 

1  0 

12  44 

12  46 

12  49 

12  52 

12  56 

13  o 

13  5 

13  1° 

13  16 

13  24 

i  20 

12  52 

12  55 

12  58 

13   2 

13  6 

13  II 

13  16 

13  23 

13  30 

13  40 

i  40 

12  59 

13  3 

13  7 

13  II 

13  16 

13  22 

13  28 

13  36 

13  44 

13  55 

2  0 

13  7 

13  II 

13  16 

13  20 

13  26 

13  32 

13  40 

13  49 

13  59 

14  ii 

2  20 

13  15 

13  19 

13  25 

13  30 

13  36 

13  43 

13  52 

14  i 

14  13 

14  27 

2  40 

13  23 

13  28 

13  33 

13  40 

13  46 

13  54 

14  4 

14  14 

14  28 

14  43 

3  0 

!3  31 

13  36 

13  42 

13  49 

13  57 

!4  5 

14  16 

14  28 

14  42 

14  59 

3  20 

13  39 

13  44 

13  5i 

13  59 

14  7 

14  17 

14  28 

14  41 

14  56 

15  16 

3  40 

13  47 

13  53 

H  i 

14  8 

14  17 

14  28 

14  40 

14  55 

15  ii 

15  33 

4  0 

13  55 

14  2 

14  io 

14  18 

14  28 

14  40 

14  53 

15  8 

15  27 

15  50 

4  20 

14  3 

14  io 

14  19 

14  28 

14  38 

14  5i 

15  5 

15  22 

15  43 

16  7 

4  40 

14  ii 

14  19 

14  28 

14  38 

14  49 

15   2 

15  18 

15  36 

15  58 

16  25 

5  0 

14  19 

14  28 

14  37 

14  48 

15   0 

15  14 

15  3i 

15  50 

16  14 

16  44 

5  20 

14  27 

H  37 

14  46 

14  58 

15  ii 

15  26 

15  44 

16  5 

16  31 

17  3 

5  40 

14  35 

14  45 

14  56 

15  8 

15  22 

15  38 

15  57 

16  20 

16  47 

17  22 

6  0 

14  44 

14  54 

15  5 

15  19 

15  33 

15  50 

16  ii 

16  35 

17  5 

17  43 

6  20 

H  52 

15  3 

15  15 

15  29 

15  44 

16  3 

16  25 

16  51 

17  23 

18  5 

6  40 

15  i 

15  12 

15  25 

15  4° 

15  56 

16  16 

16  39 

17  7 

17  4i 

18  27 

7  0 

15  10 

15  22 

15  35 

15  50 

16  8 

16  29 

1653 

17  23 

18  i 

18  50 

7  20 

15  18 

12  31 

15  45 

16  i 

16  20 

16  42 

17  8 

17  40 

18  21 

19  16 

7  40 

15  27 

15  40 

15  55 

16  12 

16  32 

16  55 

17  23 

17  58 

18  42 

19  44 

8  0 

15  35 

15  50 

16  5 

16  23 

16  44 

17  9 

17  39 

18  16 

19  5 

20  15 

SMITHSONIAN  TABLES. 


175 


TABLE  61. 

DURATION    OF    SUNSHINE    AT    DIFFERENT    LATITUDES. 


Declination 
of 
the  Sun. 

LATITUDE  NORTH. 

60° 

61° 

62° 

63° 

64° 

65° 

66° 

67° 

68° 

69° 

70° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

+  8°  0' 

14  7 

14  12 

14  17 

1423 

1430 

1437 

1445 

1453 

15  2 

15  12 

1523 

8  20 

14  12 

14  i; 

1423 

14  29 

1436 

1443 

1452 

15  0 

15  10 

15  20 

1532 

8  40 

14  17 

14  22 

1428 

1435 

1442 

1450 

1458 

15  7 

15  17 

15  28 

1540 

9  0 

14  22 

1427 

1434 

1441 

1448 

1456 

15  5 

15  14 

15  25 

15  36 

1549 

9  20 

1427 

1432 

1439 

1446 

1454 

15  2 

15  II 

1521 

15  32 

15  44 

I5  57 

9  4o 

I432 

1438 

1445 

1452 

15  0 

15  9 

15  18 

15  28 

1540 

1552 

16  6 

10  0 

1437 

1443 

1450 

1458 

15  6 

15  15 

1525 

1535 

1547 

16  o 

16  15 

10  20 

1442 

1449 

1456 

15  4 

15  13 

15  22 

1532 

1543 

1555 

16  8 

16  24 

10  40 

1447 

1454 

15  2 

15  10 

15  19 

15  28 

1539 

1550 

16  3 

16  17 

1633 

II  0 

1452 

1459 

15  7 

15  16 

1525 

1535 

1546 

1558 

16  ii 

1626 

16  42 

ii  20 

1457 

15  5 

15  13 

15  22 

1531 

1541 

1553 

16  5 

16  19 

1634 

1652 

ii  40 

15  2 

15  10 

15  19 

15  28 

1538 

1548 

16  o 

16  13 

16  27 

1643 

17  i 

12  0 

15  8 

15  16 

15  25 

T534 

1544 

15  55 

16  7 

16  21 

1635 

1652 

17  ii 

12  20 

15  13 

15  21 

1531 

1540 

15  50 

16  2 

16  15 

16  29 

1644 

17  i 

17  21 

12  40 

15  18 

15  27 

15  36 

1546 

15  57 

16  9 

l6  22 

1637 

1653 

17  ii 

1731 

13  0 

15  23 

1533 

1542 

1553 

16  4 

16  16 

1630 

1645 

17  2 

17  20 

1741 

13  20 

15  29 

1539 

1548 

15  59 

16  ii 

16  23 

1637 

1653 

17  10 

1730 

1752 

13  40 

15  35 

1544 

1555 

16  5 

16  17 

1631 

1645 

17  i 

17  19 

1740 

18  3 

14  0 

1540 

1550 

16  i 

16  12 

16  24 

1638 

1653 

17  10 

1729 

1750 

18  14 

14  20 

15  46 

1556 

16  7 

16  19 

1631 

16  46 

17   I 

17  19 

1738 

18  o 

18  26 

14  40 

15  5i 

16  2 

16  13 

16  25 

1638 

1653 

17  9 

17  28 

1748 

18  ii 

1838 

15  0 

15  57 

16  8 

16  19 

1632 

16  46 

17  i 

17  17 

1737 

1758 

IS  22 

1850 

15  20 

16  2 

16  14 

1626 

1639 

1653 

17  9 

17  26 

1746 

18  8 

1833 

19  3 

15  40 

16  8 

16  20 

1632 

16  46 

17  i 

17  17 

1735 

1755 

1818 

1845 

19  16 

16  0 

16  14 

1626 

1639 

1653 

17  8 

17  25 

1744 

18  5 

18  29 

1857 

1930 

16  20 

16  20 

1632 

16  46 

17  o 

17  16 

J733 

1753 

1815 

18  40 

19  10 

1945 

16  40 

16  26 

1639 

1652 

17  7 

1723 

1741 

18  2 

1825 

1851 

1923 

20  i 

17  0 

1632 

1645 

1659 

17  14 

i73i 

1750 

18  ii 

1835 

19  3 

1936 

20  17 

17  20 

1638 

1652 

17  6 

17  22 

1739 

1759 

18  21 

1846 

19  I5 

1950 

2035 

17  40 

1645 

1658 

1713 

17  29 

1747 

18  8 

1831 

1857 

1928 

20  6 

2055 

18  0 

16  51 

17  5 

17  20 

1737 

1756 

18  17 

1841 

19  8 

1941 

20  22 

21  17 

IS  20 

1658 

17  12 

17  28 

1745 

18  5 

1826 

1852 

19  20 

1955 

20  40 

21  42 

18  40 

17  4 

17  19 

1735 

1753 

18  14 

1836 

19  3 

1933 

20  10 

2059 

22  13 

19  0 

17  ii 

17  26 

1743 

18  2 

1823 

1846 

19  14 

1946 

20  26 

21  20 

2258 

19  20 

17  17 

1733 

1751 

18  10 

1832 

1856 

1925 

20  0 

2044 

21  45 

19  40 

17  24 

1741 

1759 

18  19 

1841 

19  7 

1937 

20  14 

21  3 

22  l6 

20  0 

i73i 

1748 

18  7 

1828 

1851 

1919 

1950 

2030 

21  23 

2259 

20  20 

1738 

1756 

18  15 

1837 

19  i 

1930 

20  4 

2047 

2447 

20  40 

1745 

18  4 

1823 

1846 

19  12 

1942 

20  19 

21  5 

22  17 

21  0 

1752 

14  ii 

1832 

1856 

1923 

1925 

2034 

21  26 

23   I 

21  2O 

18  o 

28  20 

1841 

19  6 

1934 

20  8 

2050 

21  5^> 

21  40 

18  8 

1828 

1850 

19  16 

1946 

2O  22 

21   8 

22  19 

22  0 

18  16 

1837 

19  o 

19  27 

1958 

2037 

21  29 

23  2 

22  20 

18  24 

,1846 

19  10 

1938 

2O  II 

2053 

2152 

22  40 

1832 

1855 

19  20 

1950 

20  25 

21  II 

22  21 

23  0 

1841 

19  4 

1931 

20  2 

2040 

21  31 

23  3 

23  20 

1849 

1913 

1941 

20  14 

2056 

21  54 

23  27 

1852 

19  17 

1946 

20  19 

21   2 

22  3 

SMITHSONIAN  TABLES. 


I75 


TABLE   61. 


TABLE    62. 


DURATION    OF   SUNSHINE    AT 
DIFFERENT    LATITUDES. 


DECLINATION    OF    THE    SUN 
FOR    THE   YEAR   1899. 


Declination 

LATITUDE  NORTH. 

of 

the  Sun. 

71° 

72° 

73° 

74° 

75° 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

+  8°  0' 

15  35 

15  50 

16  5 

16  23 

16  44 

8  20 

15  44 

15  59 

16  16 

16  35 

16  57 

8  40 

15  53 

16  9 

16  26 

16  46 

17  10 

9  0 

16  3 

16  19 

16  37 

16  58 

17  23 

9  20 

16  12 

16  29 

16  48 

17  10 

17  37 

9  40 

l6  22 

16  39 

16  59 

17  23 

17  5i 

10  0 

16  31 

16  50 

17  ii 

17  35 

18  5 

10  20 

16  41 

17  o 

17  22 

17  49 

18  20 

10  40 

16  50 

17  ii 

17  34 

IS   2 

18  36 

II  0 

17  i 

17  22 

17  47 

18  16 

18  52 

ii  20 

17  ii 

17  34 

17  59 

18  31 

19  9 

ii  40 

17  22 

17  45 

18  13 

18  46 

19  27 

12  0 

17  32 

17  57 

18  26 

19  i 

19  46 

12  20 

17  43 

18  9 

18  40 

19  18 

20  7 

12  4O 

17  55 

IS  22 

18  55 

19  35 

20  29 

13  0 

18  6 

18  35 

19  ii 

19  54 

20  55 

13  20 

18  18 

18  49 

19  26 

20  14 

21  23 

13  40 

18  30 

19   2 

19  43 

20  35 

21  59 

14  0 

18  43 

19  17 

20  i 

21   0 

22  50 

14  20 

18  56 

19  33 

20  20 

21  28 

14  40 

19  10 

19  49 

20  41 

22   2 

15  0 

19  24 

20  7 

21  5 

22  52 

15  20 

19  40 

20  26 

21  32 

15  40 

19  55 

2O  46 

22   5 

16  0 

20  13 

21  IO 

22  54 

16  20 

20  31 

21  36 

16  40 

20  51 

22   8 

17  0 

21  I3 

22  56 

17  20 

21  39 

17  40 

22  II 

76° 

77° 

78° 

79° 

80° 

-1-  8°  0' 

17  9 

17  39 

18  16 

19  5 

20  15 

8  20 

17  23 

17  55 

18  35 

19  29 

20  50 

8  40 

17  38 

18  12 

18  56 

19  56 

21  33 

9  0 

17  53 

18  30 

19  17 

20  25 

22  35 

9  20 

18  8 

18  48 

19  41 

20  59 

9  40 

18  25 

19  8 

20  6 

21  40 

10  0 

18  41 

19  28 

20  31 

22  39 

10  20 

18  59 

19  50 

21   6 

10  40 

19  18 

20  15 

21  46 

II  0 

19  38 

20  41 

22  43 

ii  20 

19  59 

21  I3 

ii  40 

20  23 

21  50 

12  0 

20  49 

22  46 

12  20 

21  19 

12  40 

21  55 

Day  of 
Month. 

Jan. 

Feb. 

Mar. 

I 

-23°  o' 

-17°  4' 

-  7°  33' 

4 

—22   44 

16  12 

6  24 

7 

22   22 

15  16 

5  H 

10 

21  57 

14  '9 

4   4 

13 

21   28 

13  19 

2  53 

16 

20  55 

12   18 

i  42 

19 

20   19 

ii  14 

—  o  31 

21 

19  53 

10  31 

-f  o  16 

24 

19  ii 

9  25 

i  27 

27 

18  26 

8  18 

2   38 

3° 

17  38 



3  48 

Apr. 

May. 

June. 

i 

4-  4°  34' 

-H50  & 

+  22°   4' 

4 

5  43 

15  59 

22   27 

7 

6  5i 

16  50 

22   46 

10 

7  58 

17  38 

23    I 

13 

9   4 

18  24 

23   13 

16 

10   9 

19   7 

23   22 

19 

II   12 

19  47 

23   26 

21 

ii  53 

2O   12 

23   27 

24 

12  53 

20  47 

23   25 

27 

13  5' 

21   19 

23   20 

30 

14  48 

21  47 

23   II 

July. 

Aug. 

Sept. 

1 

+23°  7' 

-t-i8°  ix 

+  8°  17' 

4 

22  53 

17  15 

7  ii 

7 

22   36 

16  26 

6   4 

10 

22   15 

15  34 

4  56 

'3 

21   50 

14  40 

3  47 

16 

21   22 

13  44 

2  38 

19 

20   51 

12  46 

i  28 

21 

20   29 

12   7 

-h  o  42 

24 

19   52 

ii   6 

—  o  29 

27 

19   J3 

10   4 

i  39 

30 

18  31 

9   o 

2  49 

Oct. 

1  Nov. 

Dec. 

I 

-  3°  12' 

—14°  27' 

-21°  50' 

4 

4   22 

15  24 

22   l6 

7 

5  31 

16  18 

22   38 

IO 

6  40 

17  10 

22   56 

13 

7  48 

18   o 

23  10 

16 

8  55 

18  46 

23   2O 

19 

IO    0 

19  29 

2^   26 

21 

10  43 

19  56 

23   2J 

24 

ii  47 

20  35 

23   26 

27 

12  48 

21   9 

23   20 

30 

13  49 

21   40 

23  1° 

ITH8ONIAN  TABLES. 


177 


TABLE   63. 


RELATIVE     INTENSITY    OF    SOLAR     RADIATION 


Mean    intensity  ./    for    24-    hours   of    solar   radiation    on    a    horizontal    surface 

at    the    top    of   the    atmosphere    and    the    solar    constant  A, 

in    terms    of   the    mean    solar    constant    AO. 


Date. 

Longitude 
of  the 
Sun. 

RELATIVE  MEAN  VERTICAL  INTENSITY  (•£•)' 

A 
**o' 

LATITUDE  NORTH. 

0° 

10° 

20° 

30° 

40° 

50° 

60°     70° 

80° 

90° 

Jan.     i 
16 

o?99 
15.78 

3.303 
.307 

0.265 

.271 

0.220 
.229 

0.169 
.180 

0.117 
.129 

0.066 
.078 

0.018 
.028 

1.0335 
1.0324 

Feb.    i 

i5 

31-54 
45-34 

.312 

•  3T7 

.282 
•293 

.244 
.261 

.200 
.223 

.150 
.177 

.100 
.118 

.048 
•075 

0.006 
.027 

1.0288 
1.0235 

Mar.    i 
16 

59-  H 
73-93 

.320 
.321 

•303 
-313 

.279 
.296 

-245 
.270 

.204 
-236 

.158 
-95 

.108 
.148 

.056 
•097 

0.013 
•057 

1.0173 
1.0096 

Apr.    i 
16 

89.70 
104.49 

.317 
•311 

•319 
.321 

.312 
.323 

-295 
-3*5 

.269 
•297 

•235 
.271 

•J95 
.238 

.148 
.201 

.101 
•175 

0.082 
.177 

1.0009 
0.9923 

May    i 
16 

119.29 
134-05 

-303 
-294 

-318 
.318 

•330 

-333 

•329 
•339 

•  320 

•337 

.302 

•327 

.278 
.312 

•253 
.298 

•  255 
.317 

•259 
.322 

0.9841 
0.9772 

June    i 
16 

149.82 
164.60 

.287 
.283 

•3T5 
.313 

•334 
•334 

•345 
-348 

•349 
•354 

•345 
•353 

•337 
•348 

•344 
•361 

.360 

•378 

.366 
•384 

1 
0.9714  ! 

0.9679 

July  i 
16 

179-39 

194.13 

-283 
.287 

.312 
-3M 

-333 
•332 

-347 
-342 

•352 
.345 

•351 
•340 

•345 
•329 

•356 
•331 

•373 
•  347 

•379 
•352 

0.9666  1 
0.9674 

Aug.    i 
16 

209.94 
224.73 

•294 
•303 

-316 
-318 

•330 
-325 

•334 
-322 

•330 
.310 

•318 
.291 

.300 
.264 

.282 
•  234 

•  295 
.227 

.300 
.231 

0.9/09 
0.9760 

Sept.    i 
16 

240.50 
255-29 

.310 
•315 

.318 
.315 

•3i6 
.305 

-305 
.284 

.285 
.256 

.256 

.220 

.220 

.178 

.180 
.130 

•139 
.107 

.140 
•043 

0.9828 
0.9909 

0<tf.'     i 

16 

270.07 

284.86 

.317 
-3i6 

•308 
.298 

.289 
.271 

.261 
-236 

.225 
.194 

.183 
.147 

•135 
.097 

.084 
.047 

•065 
.015 

0.9995 
1.0080 

Nov.    i 
16 

300.63 
3T5-42 

.312 
.308 

.286 
.276 

.251 
•235 

.211 
.190 

.164 
.140 

.114 
.089 

•063 
.040 

.018 

1.0164 
1-0235 

Zto.    i 

16 

330.19 
344.98 

•  304 
.302 

.267 
-263 

.224 
.218 

-175 
.I67 

.124 
•US 

.072 
.064 

.024 
.016 

1.0288 
1.0323 

y^ar..... 

3.305 

0.301 

0.289 

0.268 

0.241 

0.209 

0.173 

0.144 

o.i33 

0.126 

SMITHSONIAN  TABLES. 


I78 


CONVERSION    OF   LINEAR    MEASURES. 


Indies  into  millimetres TABLE  64 

Millimetres  into  inches TABLE  .65 

Feet   into   metres v    .  TABLE  66 

Metres  into  feet .     .     .     ....     .  TABLE  67 

Miles  into  kilometres TABLE  68 

Kilometres  into  miles TABLE  69 

Interconversion  of  nautical  and  statute  miles    .     .     »     .     .     .  TABLE  70 

Continental  measures  of  length  with  their  metric  and  English 

equivalents      .     .     .     .     ....     .     *     .     •*     .  •'*.   .     .  TABLE  71 


179 


TABLE    64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07         .08         .09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

0.00 

O.OO 

0.25 

0.5I 

0.76 

1.02 

1.27 

1.52 

1.78 

2.03 

2.29 

O.IO 

2-54 

2-79 

3-05 

3-30 

3.56 

3-Sl 

4.06 

4-32 

4-57 

4.83 

O.2O 

5-08 

5-33 

5-59 

5.84 

6.10 

6-35 

6.60 

6.86 

7.11 

7-37 

0.30 

7.62 

7.87 

8.13 

8.38 

8.64 

8.89 

9.14 

940 

9-65 

9.91 

0.40 

10.16 

10.41 

10.67 

10.92 

11.18 

H.43 

11.68 

11.94 

12.19 

12-45 

0.50 

12.70 

12.95 

13.21 

13.46 

13.72 

13-97 

14.22 

14.48 

14-73 

14.99 

o.bo 

15-24 

15-49 

15.75 

16.00 

16.26 

16.51 

16.76 

17.02 

17.27 

17.53 

0.70 

17.78 

18.03 

18.29 

18.54 

1  8.80 

19.05 

19.30 

I9-56 

19.81 

20.07 

0.80 

20.32 

20.57 

20.83 

21.08 

21.34 

21-59 

21.84 

22.10 

22.35 

22.61 

0.90 

22.86 

23.11 

23-37 

23.62 

23.88 

24.13 

24.38 

24.64 

24.89 

25-15 

1.00 

25.40 

25-65 

25.91 

26.16 

26.42 

26.67 

26.92 

27.18 

2743 

27.69 

1.  10 

27.94 

28.19 

28.45 

28.70 

28.96 

29.21 

29.46 

29.72 

29.97 

30.23 

1.20 

30.48 

30./3 

30.99 

31.24 

3i-5o 

31-75 

32.00 

32.26 

32-51 

32.77 

1.30 

33-02 

33-27 

33-53 

33-78 

34-04 

34-29 

34-54 

34.80 

35-05 

35-31 

1.40 

35.56 

35-Si 

36.07 

36-32 

36.58 

36.83 

37.08 

37-34 

37.59 

37.85 

1.50 

38.10 

38.35 

38.61 

38.86 

39.12 

39-37 

39.62 

39.88 

40.13 

40.39 

1.60 

40.64 

40.89 

4i.i5 

41.40 

41.66 

41.91 

42.16 

42.42 

42.67 

42.93 

1.70 

43.18 

43-43 

43-69 

43-94 

44.20 

44-45 

44-70 

44.96 

45-21 

4547 

1.80 

45-72 

45-97 

46.23 

46.48 

46.74 

46.99 

47-24 

47-50 

47.75 

48.01 

1.90 

•  48.26 

48.51 

48.77 

49.02 

49.28 

49-53 

49.78 

50.04 

50.29 

50.55 

2.00 

50.80 

51-05 

5i.3i 

51-56 

51-82 

52.07 

52.32 

52.58 

52.83 

53.09 

2.10 

53.34 

53-59 

53-85 

54.10 

54.36 

54-6i 

54-86 

55-12 

55-37 

55.63 

2.20 

55-88 

56-13 

56.39 

56.64 

56.90 

57-15 

5740 

57.66 

57-91 

58.17 

2.30 

58.42 

58.67 

58.93 

59-iS 

59-44 

59-69 

59-94 

60.20 

V- 

60.45 

60.71 

2.40 

60.96 

61.21 

61.47 

61.72 

61.98 

62.23 

62.48 

62.74 

62.99 

•  63.25 

2.50 

63.50 

63.75 

64.01 

64.26 

64-52 

64.77 

65.02 

65.28 

65.53 

6579 

2.60 

66.04 

66.29 

66.55 

66.80 

67.06 

67.31 

67-56 

67.82 

68.07 

68.33 

2.70 

68.58 

68.83 

69.09 

69-34 

69.60 

69-85 

70.10 

70.36 

70.61 

70.87 

2.80 

71.12 

7L37 

71.63 

71.88 

72.14 

72.39 

72.64 

72.90 

73-!5 

7341 

2.90 

73-66 

73-91 

74.17 

74.42 

74.68 

74-93 

75.18 

7544 

75-69 

75-95 

3.00 

76.20 

76.45 

76.71 

76.96 

77.22 

7747 

77-72 

77.98 

78.23 

78.49  i 

3-io 

78.74 

78.99 

79.25 

79-50 

79.76 

80.01 

80.26 

80.52 

80.77 

81.03  ! 

3.20 

81.28 

8i.53 

81.79 

82.04 

82.30 

82.55 

82.80 

83.06 

83-31 

83.57  | 

3.30 

83.82 

84.07 

84.33 

84.59 

84.84 

85.09 

85.34 

85.60 

85-85 

86.11 

340 

86.36 

86.61 

86.87 

87.12 

87-38 

87.63 

87.88 

88.14 

88.39 

88.65  ! 

3.50 

88.90 

89-15 

89.41 

89.66 

89.92 

90.17 

90.42 

90.68 

90.93 

91.19 

3-6o 

91.44 

91.69 

9L95 

92.20 

92.46 

92.71 

92.96 

93-22 

9347 

93-73  i 

3-7o 

93.98 

94.23 

94-49 

94-74 

95-00 

95.25 

95-50 

95.76 

96.01 

96.27 

3-80 

96.52 

96.77 

97-03 

97.28 

97-54 

97.79 

98.04 

98.30 

98.55 

98.81 

3-90 

99.06 

99-3  1 

99-57 

99-82 

100.08 

100.33 

100.58 

100.84 

101.09 

101.35  | 

4.00 

101.60 

101.85 

IO2.II 

102.36 

102.62 

102.87 

103.12 

103.38 

103-63 

103.89  j 

4.10 

104.14 

104-39 

104.65 

104.90 

105.16 

105.41 

105.66 

105.92 

106.17 

106.43  ; 

4.20 

106.68 

106.93 

107.19 

107.44 

107.70 

107.95 

108.20 

108.46 

108.71 

108.97  i 

4-3° 

109.22 

109.47 

109.73 

109.98 

110.24 

110.49 

110.74 

III.OO 

111.25 

111.51 

440 

111.76 

1  12.01 

112.27 

112.52 

112.78 

113-03 

113.28 

113.54 

H3.79 

114.05  j 

4.50 

114.30 

U4-55 

II4.8I 

115.06 

II5-32 

H5.57 

115.82 

1  1  6.08 

116.33 

116.59 

4.60 

116.84 

117.09 

117-35 

117.60 

117.86 

n8.ii 

118.36 

118.62 

118.87 

119.13 

4.70 

119.38 

119.63 

119.89 

120.14 

120.40 

120.65 

120.90 

121.  l6 

121.41  j  121.67  1 

4.80 

121.92 

122.17 

122.43 

122.68 

122.94 

123.19 

12344 

123.70 

123-95 

124.21 

4.90 

124.46 

124.71 

124.97 

125.22 

125.48 

125.73 

125.98 

126.24 

126.49 

126.75  ! 

5.00 

127.00 

127.25 

T27.5I 

127.76 

128.02 

128.27 

128.52 

128.78 

129.03 

129.29 

P      o  f  nal  Parts       Inch-      o.ooi      0.002      0.003      0.004      0.005      0.006      0.007      0.008      0.009 

mm.     0.025      0.051       0.076      0.102      0.127      0.152      0.178      0.203       0.229 

SMITHSONIAN  TABLES. 


1 80 


TABLE   64. 


INCHES    INTO    MILLIMETRES. 

i  inch  —  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

5.00 

127.00 

127.25 

127.51 

127.76 

128.02 

128.27 

128.52 

128.78 

129.03 

129.29 

5.10 

129.54 

129.79 

130.05 

130.30 

130.56 

130.81 

131.06 

I3L32 

I3L57 

131.83 

5-20 

132.08 

132.33 

132.59 

132.84 

133-10 

133.35 

133.60 

133-86 

134.11 

134.37 

5.3° 

134.62 

134.87 

135.13 

135.38 

135.64 

135.89 

136.14 

136.40 

136-65 

136.91 

5.40 

137.16 

I374I 

137.67 

137.92 

138.18 

138.43 

138.68 

138.94 

I39.I9 

139-45 

5.50 

139.70 

139.95 

140.21 

140.46 

140.72 

140.97 

141.22 

141.48 

I4L73 

141.99 

e  60 

142.24 

142.49 

142.75 

143.00 

143.26 

I43-5I 

143.76 

144.02 

144.27 

144-53 

5.70 

144.78 

145.03 

I45.29 

145-54 

145.80 

146.05 

146.30 

146.56 

146.81 

147.07 

5.80 

I47-32 

147.57 

147.83 

148.08 

148.34 

148.59 

148.84 

149.  10 

149.35 

149.61 

5.90 

149.86 

I50.II 

150.37 

150.62 

150.88 

I5LI3 

I5L38 

151.64 

151.89 

152.15 

6.00 

152.40 

152.66 

152.91 

153.16 

I53.42 

153.67 

I53-92 

154.18 

154.43 

154.69 

6.10 

154.94 

155.19 

155.45 

I55.70 

155.96 

156.21 

156.46 

156.72 

156.97 

157.23 

6.2O 

157.48 

157.73 

157-99 

158.24 

158.50 

158.75 

159.00 

159.26 

159.51 

159.77 

6.30 

160.02 

160.27 

160.53 

160.78 

161.04 

161.29 

161.54 

161.80 

162.05 

162.31 

_  * 
6.40 

162.56 

162.81 

163.07 

163-32 

163.58 

163.83 

164.08 

164.34 

164.59 

164.85 

6.50 

165.10 

165.35 

165.61 

165.86 

166.12 

166.37 

166.62 

166.88 

167.13 

167.39 

6.60 

167.64 

167-89 

168.15 

168.40 

168.66 

168.91 

169.16 

169.42 

169.67 

169.93 

6.70 

170.18 

170.43 

170.69 

170.94 

171.20 

I7L45 

171.70 

171.96 

172.21 

172.47 

6.80 

172.72 

172.97 

I73.23 

173.48 

173.74 

173.99 

174.24 

174.50 

174-75 

175.01 

6.90 

175.26 

175.51 

175.77 

176.02 

176.28 

176.53 

176.78 

177.04 

177.29 

177.55 

7.00 

177.80 

178.05 

178.31 

178.56 

178.82 

179.07 

179.32 

179.58 

179.83 

180.09 

7.10 

180.34 

180.59 

180.85 

181.10 

181.36 

181.61 

181.86 

182.12 

182.37 

182.63 

7.20 

182.88 

183-13 

183.39 

183.64 

183.90 

184.15 

184.40 

184.66 

184.91 

185.17 

7-3° 

185.42 

185.67 

185.93 

186.18 

186.44 

186.69 

186.94 

187.20 

187.45 

187.71 

7.40 

187.96 

188.21 

188.47 

188.72 

188.98 

189.23 

189.48 

189.74 

189.99 

190.25 

7.50 

190.50 

190.75 

191.01 

191.26 

191.52 

191.77 

192.02 

192.28 

192.53 

192.79 

7.60 

193.04 

193.29 

193-55 

193.80 

194.06 

194-31 

I94-56 

194.82 

I95.07 

195.33 

7.70 

195-58 

I95.83 

196.09 

196-34 

196.60 

196.85 

197.10 

197.36 

197.61 

197.87 

7.80 

198.12 

198.37 

198-63 

198.88 

199.14 

199.39 

199.64 

199.90 

200.15 

200.41 

7.90 

200.66 

200.91 

201.17 

201.42 

201.68 

201.93 

202.18 

202.44 

202.69 

202.95 

8.00 

203.20 

203.45 

203.71 

203.96 

204.22 

204.47 

204.72 

204.98 

205.23 

205.49 

8.10 

205.74 

205.99 

206.25 

206.50 

206.76 

207.01 

207.26 

207.52 

207.77 

208.03 

8.20 

208.28 

208.53 

208.79 

209.04 

209.30 

209.55 

209.80 

210.06 

210.31 

210.57 

8.30 

210.82 

211.07 

211-33 

211.58 

211.84 

212.09 

212.34 

712.  60 

212.85 

213.11 

8.40 

213-36 

213.61 

213.87 

214.12 

214.38 

214-63 

214.88 

215.14 

215.39 

215.65 

8.50 

215.90 

216.15 

216.41 

216.66 

216.92 

217.17 

217.42 

217.68 

217.93 

218.19 

8.60 

218.44 

218.69 

218.95 

219.20 

219.46 

219.71 

219.96 

220.22 

220.47 

220.73 

8.70 

220.98 

221.23 

221.49 

221.74 

222.00 

222.25 

222.50 

222.76 

223.01 

223.27 

8.80 

223.52 

223.77 

224.03 

224.28 

224-54 

224.79 

225.04 

225.30 

225.55 

225.81 

8.90 

226.06 

226.31 

226.57 

226.82 

227.08 

227.33 

227.58 

227.84 

228.09 

228.35 

9.00 

228.60 

228.85 

229.11 

229.36 

229.62 

229.87 

230.12 

230.38 

230.63 

230.89 

9.10 

231.14 

23L39 

231.65 

231.90 

232.16 

232.41 

232.66 

232.92 

233.I7 

233-43 

9.20 

233.68 

233-93 

234.19 

234.44 

234.70 

234-95 

235.20 

23546 

235.71 

235-97 

9-30 

236.22 

236.47 

236.73 

236.98 

237.24 

237-49 

237-74 

238.00 

238.25 

238.51 

9.40 

238.76 

239.01 

239.27 

239-52 

239.78 

240.03 

240.28 

240.54 

240.79 

241.05 

9.50 

241.30 

24L55 

241.81 

242.06 

242.32 

242.57 

242.82 

243.08 

243.33 

243.59 

9.60 

243.84 

244.09 

244-35 

244.60 

244.86 

245.11 

245.36 

245-62 

245.87 

246.13 

9.70 

246.38 

246.63 

246.89 

247.14 

247.40 

247.65 

247.90 

248.16 

248.41 

248.67 

•  9.80 

248.92 

249.17 

249-43 

249.68 

249.94 

250.19 

250.44 

250.70 

250.95 

251.21 

9.90 

251.46 

251.71 

25L97 

252.22 

252.48 

252.73 

252.98 

253.24 

253.49 

253.75 

10.00 

254.00 

254.25 

254-5I 

254.76 

255.02 

255-27 

255-52 

255.78 

256.03 

256.29 

Inch,     o.ooi       0.002       0.003      0.004      0.005      0.006      0007       0.008      0.009 

Proportional  Parts.                                                -                        7                      780  201      o  220 

SMITHSONIAN  TABLES. 


181 


TABLE   64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

10.00 

254.00 

254.25 

254.51 

254.76 

255.02 

255.27 

255.52 

255.78 

256.03 

256.29 

IO.IO 

256.54 

256.79 

257.05 

257.30 

257.56 

257.81 

258.06 

258.32 

258.57 

258.83 

10.20 

259.08 

259.33 

259.59 

259.84 

260.  10 

260.35 

260.60 

260.86 

26l.II 

261.37 

10.30 

261.62 

261.87 

262.!., 

262.38 

262.64 

262.89 

263.  14 

263.40 

263.65 

263.91 

10.40 

264.  16 

264.41 

264.6* 

264.92 

265.18 

265.43 

265.68 

265.94 

266.19 

266.45 

10.50 

266.70 

266.95 

267.2! 

267.46 

267.72 

267.97 

268.22 

268.48 

268.73 

268.99 

10.60 

269.24 

269.49 

269.75 

270.00 

270.26 

270.51 

270.76 

271.02 

271.27 

27L53 

10.70 

271.78 

272.03 

272.29 

272.54 

272.80 

273.05 

273.30 

273.56 

273.81 

274.07 

10.80 

274.32 

274.57 

274-93 

275.08 

275-34 

275-59 

275.84 

276.10 

276.35 

276.61 

10.90 

276.86 

277.11 

277.37 

277.62 

277.88 

278.13 

278.38 

278.64 

278.89 

279.15 

11.00 

279.40 

279.65 

279.91 

280.16 

280.42 

280.67 

280.92 

28l.l8 

281.43 

281.69 

II.  1C 

281.94 

282.19 

282.45 

282.70 

282.96 

283.21 

283.46 

283.72 

283.97 

284.23 

ii.  20 

284.48 

284.73 

284.99 

285.24 

285.50 

285.75 

286.00 

286.26 

286.51 

286.77 

11.30 

287.02 

287.27 

287.53 

287.78 

288.04 

288.29 

288.54 

288.80 

289.05 

289.31 

11.40 

289.56 

289.81 

290.07 

290.32 

290.58 

290-83 

291.08 

291.34 

29L59 

291.85 

11.50 

292.10 

292.35 

292.61 

292.86 

293.12 

293o7 

293.62 

293.88 

294.13 

294.39 

1  1.  60 

294.64 

294.89 

295.I5 

295.40 

295.66 

295-91 

296.16 

296.42 

296.67 

296.93 

11.70 

297.18 

297-43 

297.69 

297.94 

298.20 

298.45 

298.70 

298.96 

299.21 

299.47 

11.80 

299.72 

299.97 

300.23 

300.48 

300.74 

300.99 

301.24 

301.50 

301.75 

302.01 

11.90 

302.26 

302.51 

302.77 

303.02 

303.28 

303.53 

303.78 

304.04 

304.29 

304-55 

12.00 

304.80 

305.05 

305.31 

305.56 

305.82 

306.07 

306.32 

306.58 

306.83 

307.09 

12.10 

307.34 

307.59 

307.85 

308.  10 

308.36 

308.61 

308.86 

309.12 

309.37 

309.63 

12.20 

309.88 

310.13 

310.39 

310.64 

310.90 

3H.I5 

311.40 

311.66 

311.91 

312.17 

12.30 

312.42 

312.67 

312.93 

313.18 

3I3.44 

3J3-69 

313.94 

314.20 

314.45 

3I4-7I 

12.40 

314.96 

S^-zi 

315.47 

315.72 

315.98 

316.23 

316.48 

316.74 

316.99 

317.25 

12.50 

3I7.50 

317.75 

3I8.0I 

318.26 

318.52 

318.77 

319.02 

319.28 

319.53 

319.79 

12.60 

320.04 

320.29 

320.55 

320.80 

321.06 

321-31 

32L56 

321.82 

322.07 

322.33 

12.70 

322.58 

322.83 

323.09 

323.34 

323-60 

323-85 

324.10 

324-36 

324.61 

324.87 

12.80 

325-12 

325.37 

325.63 

325.88 

326.14 

326.39 

326.64 

326.90 

327.15 

327.41 

12.90 

327.66 

327.91 

328.17 

328.42 

328.68 

328.93 

329.18 

32944 

329.69 

329.95 

13.00 

330.20 

330.45 

330.71 

330.96 

33L22 

33L47 

33L72 

33L98 

332.23 

332.49 

13.10 

332.74 

332.99 

333.25 

333.50 

333.76 

334-01 

334.26 

334-52 

334-77 

335.03 

13.20 

335.28 

335.53 

335-79 

336.04 

336.30 

336.55 

336.80 

337.06 

337-31 

337.57 

13-30 

337.82 

338.07 

338.33 

338.58 

338.84 

339-09 

339-34 

339.60 

339-85 

340.11 

13.40 

340.36 

340.61 

340.87 

341.12 

34L38 

341.63 

341.88 

342.14 

342.39 

342.65 

13.50 

342.90 

343.15 

34341 

343-66 

343-92 

344.17 

344.42 

344-68 

344-93 

345-19 

13.60 

345-44 

345.69 

345-95 

346.  20 

346.46 

346.71 

346.96 

347.22 

347-47 

347.73 

13.70 

347.98 

348.23 

348.49 

348.74 

349.00 

349-25 

349.50 

349.76 

35o.oi 

350.27 

13.80 

350.52 

350.77 

35L03 

35L28 

351-54 

35L79 

352.04 

352.30 

352.55 

352.81 

13.90 

353-06 

353.31 

353-57 

353.82 

354.08 

354-33 

354.58 

354.84 

355-09 

355-35 

14.00 

355-60 

355.85 

356.li 

356.36 

356.62 

356.87 

357-12 

357.38 

357.63 

357.89 

14.10 

358.14 

358.39 

358.65 

358.90 

359-  l6 

359-41 

359-66 

359.92 

360.17 

360.43 

14.20 

360.68 

360.93 

361.19 

361.44 

361.70 

36i.95 

362.20 

362.46 

362.71 

362.97 

14.30 

363.22 

363.47 

363-73 

363-98 

364-24 

364.49 

364.74 

365.00 

365-25 

365.51 

14.40 

365-76 

366.01 

366.27 

366.52 

366.78 

367.03 

367.28 

367-54 

367.79 

368.05 

14.50 

368.30 

368.55 

368.81 

369.06 

369-32 

369.57 

369-82 

370.08 

370.33 

370.59 

14.60 

370.84 

371.09 

37L35 

371.60 

371.86 

372.11 

372.36 

372.62 

372.87 

373.13 

14.76 

373o8 

373.63 

373.89 

374-14 

374-40 

374.65 

374.90 

375-16 

375-41 

375.67 

14.80 

375-92 

376.17 

376.43 

376.68 

376.94 

377-19 

377-44 

377.70 

377.95 

378.21 

14.90 

378.46 

378.71 

378.97 

379.22 

379.48 

379-73 

379.98 

380.24 

380.49 

380.75 

15.00 

381.00 

381.25 

381.51 

381.76 

382.02 

382.27 

382.52 

382.78 

383-03 

383.29 

Inch,     o.ooi       0.002      0.003      °-°°4      °-°°5       °-°°6      °-°°7      o-°°8       °-o°9 

Prooort  ona    Parts 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


182 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


TABLE  64. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

15.00 

381.00 

381.25 

38I.5I 

381.76 

382.02 

382.27 

382.52 

382.78 

383-03 

383-29 

15.10 

383-54 

383.79 

384-05 

384.30 

384.56 

384.81 

385.06 

385.32 

385.57 

385-83 

15.20 

386.08 

386.33 

386.59 

386.84 

387.10 

387.35 

387.60 

387.86 

388.11 

388.37 

15-30 

388.62 

388.87 

389.I3 

389.38 

389.64 

389.89 

390.  14 

390.40 

390.65 

390.91 

15.40 

391.16 

39I-4i 

391-67 

391.92 

392.18 

392-43 

392-68 

392-94 

393.I9 

393-45 

15.50 

393-70 

393-95 

394-21 

39446 

394-72 

394-97 

395-22 

395-48 

395-73 

395-99 

15.60 

396.24 

39.649 

396.75 

397.00 

397.26 

397-5* 

397.76 

398.02 

398.27 

398.53 

15-70 

398.78 

399-03 

399.29 

399-54 

399.80 

400.05 

400.30 

400.56 

400.81 

401.07 

15.80 

401.32 

401.57 

401.83 

402.08 

402.34 

402.59 

402.84 

403.10 

403.35 

403-61 

15-90 

403.86 

404.  1  1 

404.37 

404.62 

404.88 

405-13 

405-38 

405-64 

405.89 

406.15 

16.00 

406.40 

406.65 

406.91 

407.16 

407.52 

407.67 

407.92 

408.18 

408.43 

408.69 

16.10 

408.94 

409.19 

409.45 

409.70 

409.96 

410.21 

410.46 

410.72 

410.97 

411.23 

16.20 

411.48 

4II-73 

411.99 

412.24 

412.50 

412.75 

413.00 

413.26 

4I3.5I 

4I3-77 

16.30 

414.02 

414.27 

414.53 

414.78 

415.04 

415-29 

4I5-54 

415.80 

416.05 

416.31 

16.40 

416.56 

416.81 

417.07 

417.32 

417.58 

417-83 

418.08 

418.34 

418.59 

418.85 

16.50 

419.10 

4I9.35 

419.61 

419.86 

420.12 

420.37 

420.62 

420.88 

421.13 

421.39 

16.60 

421.64 

421.89 

422.15 

422.40 

422.66 

422.91 

423.16 

423.42 

423.67 

423.93 

16.70 

424.18 

42443 

424.69 

424.94 

425.20 

425.45 

425.70 

425-96 

426.21 

426.47 

16.80 

426.72 

426.97 

427-23 

427.48 

427.74 

427.99 

428.24 

428.50 

428.75 

429.01 

16.90 

429.26 

429-51 

429.77 

430.02 

430.28 

430.53 

430.78 

431.04 

43L29 

431-55 

17.00 

431.80 

432.05 

432-31 

432.56 

432.82 

433.07 

433-32 

433-58 

433.83 

434.09 

17.10 

434.34 

434-59 

434.85 

435-10 

435.36 

435.61 

435-86 

436.12 

436.37 

436-63 

17.20 

436.88 

437.13 

437-39 

437-64 

437.90 

438.15 

438.40 

438.66 

438.91 

439-  i  7 

17.30 

439.42 

439.67 

439-93 

440.18 

440.44 

440.69 

440.94 

44I.2O 

44L45 

441.71 

17.40 

441.96 

442.21 

442.47 

442.72 

442.98 

443-23 

443.48 

443-74 

443-99 

444-25 

17.50 

444.50 

444-75 

445.01 

445.26 

445-52 

445.77 

446.02 

446.28 

446.53 

446.79 

17.60 

447.04 

447.29 

447-55 

447.80 

448.06 

448.31 

448.56 

448.82 

449.07 

449-33 

17.70 

449.58 

449.83 

450.09 

450.34 

450.60 

450.85 

451.10 

45L36 

451.61 

45I-87 

17.80 

452.12 

452.37 

452.63 

452.88 

453.14 

453-39 

453-64 

453.90 

454-15 

454-41 

17.90 

454.66 

454-  91 

455-17 

455-42 

455-68 

455-93 

456.18 

456.44 

456.69 

456.95 

18.00 

457-20 

457-45 

457-71 

457.96 

458.22 

458.47 

458.72 

458.98 

459-23 

459-49 

18.10 

459-74 

459-99 

460.25 

460.50 

460.  76 

461.01 

461.26 

461.52 

461.77 

462.03 

18.20 

462.28 

462.53 

462.79 

463.04 

463-30 

463.55 

463.80 

464.06 

464.31 

464-57 

18.30 

464.82 

465.07 

465.33 

465-58 

465-84 

466.09 

466.34 

466.60 

466.85 

467.11 

18.40 

467.36 

467.61 

467.87 

468.12 

468.38 

468.63 

468.88 

469.14 

469-39 

469.35 

18.50 

469.90 

470.  15 

470.41 

470.66 

470.92 

471.17 

471.42 

471-68 

471-93 

472.19 

18.60 

472.44 

472.69 

472.95 

473.20 

473.46 

473-71 

473-96 

474.22 

474-47 

474-73 

18.70 

474.98 

475-23 

475-49 

475.74 

476.00 

476.25 

476.50 

476.76 

477-01 

477.27 

18.80 

477-52 

477-77 

478.03 

478.28 

478.54 

478.79 

479.04 

479.30 

479-55 

479.81 

18.90 

480.06 

480.31 

480.57 

480.82 

481.08 

48i.33 

481.58 

481.84 

482.09 

482.35 

19.00 

482.60 

482.85 

483.11 

483-36 

483.62 

483.87 

484.12 

484.38 

484.63 

484-89 

19.10 

485.14 

485-39 

485-65 

485.90 

486.  1  6 

486.41 

486.66 

486.92 

487.17 

487.43 

19.20 

487.68 

487.93 

488.  19 

488.44 

488.70 

488.95 

489.  20 

489.46 

489.71 

489.97 

19.30 

490.22 

490.47 

490.73 

490.98 

491.24 

491.49 

491.74 

492.00 

492.25 

492.51 

19.40 

492.76 

493-01 

493-27 

493-52 

493-78 

494.03 

494.28 

494-54 

494-79 

495-05 

19.50 

495-30 

495-55 

495.81 

496.06 

496.32 

496.57 

496.82 

497.08 

497-33 

497-59 

19.60 

497.84 

498.09 

498.35 

498.60 

498.86 

499.11 

499.36 

499.62 

499.87 

500.13 

19.70 

500.38 

500.34 

500.89 

501.14 

501.40 

501.65 

501.91 

502.16 

502.41 

502.67 

19.80 

502.92 

503-18 

503.43 

503.68 

503.94 

504-19 

50445 

504.70 

504.95 

505-21 

19.90 

505-46 

505-72 

505.97 

506.22 

506.48 

506.73 

506.99 

507-24 

507.49 

507.75 

20.00 

508.00 

508.26 

508.51 

508.76 

509.02 

509.27 

509.53 

509-78 

510.03 

510.29 

Prooorti    al  P    t       Inch-    °-oor      °-002      °-°°3      0.°°4      0.005      °.oo6      0.007      0.008      0.009 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


183 


TABLE   64. 


INCHES    INTO    MILLIMETRES. 

i   inch  —  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

20.00 

508.00 

508.26 

508.51 

508.76 

509.02 

509.27 

509.53 

509.78 

510.03 

510.29 

20.10 

510.54 

510.80 

5H.05 

5H.30 

5H.56 

511.81 

512.07 

512.32 

512.57 

512.83 

20.20 

513.08 

513.34 

513.59 

513.84 

514.10 

514.35 

514.61 

514.86 

515.11 

5I5-37 

20.30 

515.62 

515.88 

516.13 

516.38 

516.64 

516.89 

517.15 

517.40 

5I7-65 

517.91 

2O.4O 

518.16 

518.42 

518.67 

518.92 

519.18 

5I9-43 

5I9.69 

5I9.94 

520.19 

520.45 

20.50 

520.70 

520.96 

521.21 

521.46 

521.72 

521.97 

522.23 

522.48 

522.73 

522.99 

20.60 

523.24 

523.50 

523.75 

524.00 

524.26 

524.51 

524-77 

525-02 

525.27 

525-53 

20.70 

525.78 

526.04 

526.29 

526.54 

526.80 

526.95 

527.31 

527.56 

527.81 

528.07 

20.80 

528.32 

528.58 

528.83 

529.08 

529.34 

529.59 

529.85 

530.10 

530-35 

530.61 

20.90 

530.86 

53!-I2 

53L37 

S31-62 

531-88 

532.13 

532-39 

532.64 

532.89 

533-15 

21.00 

533.40 

533.66 

533  -91 

534-i6 

534.42 

534-67 

534-93 

535-18 

535-43 

535.69 

21.  IO 

535-94 

536.20 

536.45 

536.70 

536.96 

537-21 

537-47 

537-72 

537.98 

538.23 

2  1.  2O 

538.48 

538.74 

538.99 

539-24 

539-50 

539-75 

540.01 

540.26 

540.51 

540.77 

21.30 

541.02 

541.28 

541-53 

54L78 

542.04 

542.29 

542.55 

542.80 

543-05 

543-31 

2140 

543.56 

543.82 

544-07 

544-32 

544.58 

544.83 

545-09 

545-34 

545-59 

545.85 

21.50 

546.10 

546.36 

546.61 

546.86 

547.12 

547-37 

547.63 

547-88 

548.13 

548.39 

21.60 

548.64 

548.90 

549-  15 

549-40 

549.66 

549-91 

550.17 

550.42 

550.67 

550.93 

21.70 

55i.i8 

551.44 

551-69 

551-94 

552.20 

552.45 

552.71 

552.96 

553-21 

553.47 

21.80 

553-72 

553.98 

554-23 

554.48 

554-74 

554-99 

555-25 

555-50 

555-75 

556.01 

21.90 

556.26 

556.52 

556.77 

557-02 

557-28 

557-53 

557-79 

558.04 

558.29 

558.55 

22.00 

558.8o 

559.06 

559-31 

559.56 

559-82 

560.07 

560.03 

560.58 

560.83 

561.09 

22.10 

561.34 

561.60 

561.85 

562.10 

562.36 

562.61 

562.87 

563.12 

563.37 

563-63  ! 

22.20 

563.88 

564.14 

564.39 

564.64 

564.90 

565-15 

565.41 

565-66 

565.91 

566.17! 

22.30 

566.42 

566.68 

566.93 

567-18 

567.44 

567.69 

567.95 

568.20 

568.45 

568.71  1 

22.40 

568.96 

569.22 

569.47 

569-72 

569.98 

570.23 

570.49 

570.74 

570-99 

571.25; 

22.50 

57L50 

571.76 

572.01 

572.26 

572.52 

572-77 

573.03 

573-28 

573-53 

573-79  i 

22.60 

574.04 

574.30 

574-55 

574.80 

575.06 

575.31 

575-57 

575.82 

576.07 

576-33 

22.70 

576.58 

576.84 

577.09 

577-34 

577.60 

577-95 

578.11 

578.36 

578.61 

578.87  ! 

22.80 

579-12 

579.38 

579.63 

579-88 

580.14 

580.39 

580.65 

580.90 

581-15 

581.41 

22.90 

581.66 

581.92 

582.17 

582.42 

582.68 

582.93 

583-19 

58344 

583-69 

583.95 

23.00 

584.20 

584.46 

584-71 

584-96 

585.22 

585.47 

585.73 

585.98 

586.23 

586.49 

23.10 

586.74 

587.00 

587-25 

587-50 

587.76 

588.01 

588.27 

588.52 

588.77 

589-03 

23.20 

589.28 

589.54 

589-79 

590.04 

590.30 

590.55 

590.8i 

591.06 

59I-3I 

59L57  1 

23-30 

591-82 

592.08 

592.33 

592-58 

592.84 

593-09 

593-35 

593-6o 

593-85 

594-n 

23.40 

594.36 

594.62 

594.87 

595-12 

595.38 

595.63 

595-89 

596-14 

596.39 

596-65  1 

23.50 

596.90 

597.16 

597-41 

597-66 

597-92 

598.17 

598.43 

598.68 

598.93 

599-  19! 

23.60 

599-44 

599.70 

599-95 

600.  20 

600.46 

600.71 

600.97 

601.22 

601.47 

601.73  i 

23.70 

601.98 

602.24 

602.49 

602.74 

603.00 

603.25 

603.51 

603.76 

604.01 

604.27  i 

23.80 

604.52 

604.78 

605.03 

605.28 

605.54 

605.79 

606.05 

606.  30 

606.55 

606.81 

23.90 

607.06 

607.32 

607.57 

607.82 

6o3.o8 

608.33 

608.59 

608.84 

609.09 

609.35 

24.00 

609.60 

609.86 

610.  n 

610.36 

610.62 

610.87 

611.13 

611.38 

611.63 

611.89 

24.10 

612.14 

612.40 

612.65 

612.90 

613.16 

613.41 

613.67 

613.92 

614.17 

614.43 

24.20 

614.68 

614.94 

615.19 

615.44 

615.70 

6i5.95 

616.21 

616.46 

616.71 

616.97 

24.30 

617.22 

617.48 

617.73 

617.98 

618.24 

618.49 

618.75 

619.00 

619.25 

619.51 

24.40 

619.76 

620.02 

620.27 

620.52 

620.78 

621.03 

621.29 

621.54 

621.79 

622.05 

24.50 

622.30 

622.56 

622.81 

623.06 

623.32 

623.57 

623.83 

624.08 

624.33 

624.59 

24.60 

624.84 

625.10 

625.35 

625.60 

625.86 

626.11 

626.37 

626.62 

626.87 

627.13 

24.70 

627.38 

627.64 

627.89 

628.14 

628.40 

628.65 

628.91 

629.16 

629.41 

629.67 

24.80 

629.92 

630.18 

630.43 

630.68 

630.94 

631.19 

631-45 

631.70 

63L95 

632.21 

24.90 

632.46 

632.72 

632.97 

633.22 

633-48 

633.73 

633-99 

634.24 

634.49 

634.75 

25.00 

635.00 

635.26 

635-5I 

635-76 

636.02 

636.27 

636-53 

636.78 

637.03 

637-29  ! 

p           .       ID*         Inch,     o.ooi       0.002      0.003      0.004      0.005      0.006      0.007       0.008      0.009 

mm.     0.025       0.051       0.076      0.102       0.127       0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


184 


TABLE   G4 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

25.00 

635.00 

635-26 

635.51 

635.76 

636.02 

636.27 

636.53 

636.78 

637.03 

637.29 

25.10 

637-54 

637.80 

638.05 

638.30 

638.56 

638.81 

639.07 

639.32 

639-57 

639.83 

25.20 

640.08 

640.34 

640.59 

640.84 

641.10 

64L35 

641.61 

641.86 

642.  1  1 

642.37 

25-3° 

642.62 

642.88 

643-  1  3 

643.38 

643-64 

643-89 

644.15 

644-40 

644.65 

644.91 

25.40 

645.16 

645.42 

645.67 

645.92 

646.18 

646.43 

646.69 

646.94 

647.19 

647.45 

25.50 

647.70 

647.96 

648.21 

648.46 

648.72 

648.97 

649.23 

649.48 

649.73 

649.99 

25.60 

650.24 

650.50 

650.75 

651.00 

651.26 

65L5I 

65L77 

652.02 

654.27 

652.53 

25.70 

652.78 

653.04 

653-29 

653-54 

653.80 

654.05 

654.31 

654-56 

654-81 

655.07 

25.80 

655.32 

655.58 

655.83 

656.08 

656.34 

656.59 

656.85 

657.10 

657.35 

657.61 

25.90 

657.86 

658.12 

658.37 

658.62 

658.88 

659-  13 

659^9 

659.64 

659.89 

660.15 

26.00 

660.40 

660.66 

660.91 

661.16 

661.42 

661.67 

661.93 

662.18 

662.43 

662.69 

26.10 

662.94 

663.20 

663.45 

663.70 

663-96 

664.21 

664.47 

664.72 

664.97 

665.23 

26.20 

665.48 

665.74 

665.99 

666.24 

666.50 

666.75 

667.01 

667.26 

667.51 

667.77 

26.30 

668.02 

668.28 

668.53 

668.78 

669.04 

669.29 

669.55 

669.80 

670.05 

670.31 

26.40 

670.56 

670.82 

671.07 

671.32 

671-58 

671.83 

672.09 

672-34 

672.59 

672.85 

26.50 

673.10 

673.36 

673.61 

673-86 

674.12 

674.37 

674.63 

674.88 

675-13 

675-39 

26.60 

675.64 

675.90 

676.15 

676.40 

676.66 

676.91 

677.17 

677.42 

677.67 

677.93 

26.70 

678.18 

678.44 

678.69 

678.94 

679.20 

67945 

679.71 

679.96 

680.21 

680.47 

26.80 

680.72 

680.98 

681.23 

681.48 

681.74 

681.99 

682.25 

682.50 

682.75 

683.01 

26.90 

683.26 

683.52 

683.77 

684.02 

684.28 

684-53 

684.79 

685.04 

685.29 

685.55 

27.00 

685.80 

686.06 

686.31 

686.56 

686.82 

687.07 

687.33 

687.58 

687.83 

688.09 

27.10 

688.34 

688.60 

688.85 

689.10 

689.36 

689.61 

689.87 

690.12 

690.37 

690.63 

27.20 

690.88 

691.14 

691.39 

691.64 

691.90 

692.15 

692.41 

692.66 

692.91 

693.17 

27.30 

693.42 

693.68 

693.93 

694.  18 

694.44 

694.69 

694.95 

695.20 

695.45 

695.71 

27.40 

695.96 

696.22 

696.47 

696.72 

696.98 

697.23 

697.49 

697.74 

697.99 

698.25 

27.50 

698.50 

698.76 

699.01 

699.  26 

699.52 

699.77 

700.03 

700.28 

700.53 

700.79 

27.60 

701.04 

701.30 

701-55 

701.80 

702.06 

702.21 

702.57 

702.82 

703.07 

703.33 

27.70 

703-58 

703.84 

704.09 

704.34 

704.60 

704-85 

705.11 

705-36 

705.61 

705.87 

27.80 

706.12 

706.38 

706.63 

706.88 

707.14 

707.39 

707.65 

707.90 

708.15 

708.41 

27.90 

708.66 

708.92 

709.17 

709.42 

709.68 

709.93 

710.19 

710.44 

710.69 

710.95 

28.00 

711.20 

711.46 

711.71 

711.96 

712.22 

712.47 

712.73 

712.98 

713.23 

713.49 

28.10 

7I3-74 

714.00 

714.25 

714.50 

714.76 

715-01 

7I5.27 

715-52 

715.77 

716.03 

28.20 

716.28 

716.54 

716.79 

717.04 

717.30 

717.55 

717-81 

718.06 

7l8.3I 

718.57 

28.30 

718.82 

719.08 

719.33 

719-58 

719.84 

720.09 

720.35 

720.60 

720.85 

721.11 

28.40 

721.36 

721.62 

721.87 

722.12 

722.39 

722.63 

722.89 

723-14 

723.39 

723.65 

28.50 

723.90 

724.16 

724.41 

724.66 

724.92 

725-17 

725.43 

725-68 

725.93 

726.19 

28.60 

726.44 

726.70 

726.95 

727.20 

727.46 

727.71 

727.97 

728.22 

728.47 

728.73 

28.70 

728.98 

729.24 

729.49 

729.74 

730.00 

730-25 

730.51 

730.76 

731.01 

731.27 

28.80 

73L52 

73L78 

732.03 

732.28 

732-54 

732.79 

733-05 

733-30 

733-55 

733.81 

28.90 

734.06 

734-32 

734.57 

734-82 

735-08 

735.33 

735-59 

735-84 

736.09 

736.35 

29.00 

736.60 

736-86 

737-11 

737.36 

737.62 

737.87 

738.13 

738.38 

738.63 

738.89 

29.10 

739-14 

739-40 

739.65 

739.90 

740.16 

740.41 

740.67 

740.92 

741.17 

741-43 

29.20 

741.68 

741.94 

742.19 

742.44 

742.70 

742-95 

743-21 

743-46 

743.71 

743-97 

29.30 

744.22 

744.48 

744.73 

744.98 

745-24 

745-49 

745-75 

746.00 

746.25 

746.51 

29.40 

746.76 

747.02 

747-27 

747-52 

747.78 

748.03 

748-29 

748.54 

748.79 

749.05 

29.50 

749-30 

749.56 

749.81 

750.06 

750.32 

750.57 

750.83 

75i.o8 

751-33 

75^59 

29.60 

751.84 

752.10 

752-35 

752.6o 

752.86 

753-n 

753.37 

753-62 

753.87 

754-13 

29.70 

754-38 

754.64 

754.89 

755-14 

755.40 

755.65 

755.91 

756.16 

756.41 

756.67 

29.80 

756.92 

757.18 

757-43 

757-68 

757-94 

758.19 

758.45 

758.70 

758.95 

w          s\J 

759.21 

29.90 

759-46 

759.72 

759-97 

760.22    760.48 

760.73 

760.99 

761.24 

761.49 

jf 

76i.75 

30.00 

762.00 

762.26 

762.51 

762.76 

763.02 

763.27 

763.53 

763.78 

764.03 

764.29 

Prooortional  Parts      In°h>    °'°°I      °'002      °'0°3      °'°°4      0*°°5      °'°o6      °'°°7      °'°°8      °*°°9 

mm.     0.025      0.051      0.076      0.102      0.127      0.152      0.178      0.203      0.229 

SMITHSONIAN  TABLES. 


185 


TABLE   64. 


INCHES    INTO    MILLIMETRES. 

i  inch  =  25.40005  mm. 


1 
Inches. 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

mm. 

30.00 

30.10 
30.20 
30.30 
30.40 

762.00 

764-54 
767.08 
769.62 
772.16 

762.26 
764.80 

767.34 
769.88 
772.42 

762.5) 
765-05 
767.59 
770.13 
772.67 

762.76 
765.30 

767.84 
770.38 
772.92 

763.02 
765.56 
768.  TO 
770.64 

773-18 

763.27 
765.81 
768.35 
770.89 

773-43 

763.53 
766.07 
768.61 
77I-I5 
773-69 

763.78 
766.32 
768.86 
771-40 
773-94 

764.03 
766.57 
769.11 
771.65 
774.19 

764-29 
766.83 

769.37 
771.91 

774-45 

30.50 

30.60 
30.70 
30.80 
30.90 

774.70 
777.24 
779-78 
782.32 
784.86 

774.96 
777-50 
780.04 
782.58 
785.12 

775-21 
777-75 
780.29 
782.83 
785.37 

775.46 
778.00 
780.54 
783.08 
785.62 

775-72 
77826 
780.80 

783.34 
785.88 

775-97 
778.51 
781.05 

783.59 
786.13 

776.23 

7/8-77 
781.31 

783-85 
786.39 

776.48 
779.02 
781.56 
784.  10 
786.64 

776.73 
779.27 
781.81 

784.35 
786.89 

776.99 

779-53 
782.07 
784.61 
787-15 

31.00 

31.10 
31.20 

31-3° 

31.40 

787.40 
789.94 
792.48 
795.02 
797.56 

787.66 
790.20 
792.74 
795.28 
797.82 

787.91 

790.45 
792.99 

795-53 
798.07 

788.16 
790.70 
793-24 
795-78 
798.32 

788.42 
790.96 
793-50 
796.04 
798.58 

788.67 
791.21 

793-75 
796.29 

798.83 

788.93 

79M7 
794-01 
796.55 
799-09 

789.18 
791.72 
794.26 
796.80 
799-34 

789.43 
791.97 

794.51 
797-05 
799-59 

789.69  ; 

792.23 
794-77 
797-31 
799.85 

31.50 

31.60 
31.70 
31.80 
31.90 

Soo.IO 
802.64 
805.18 
807.72 
810.26 

800.36 
802.90 
805.44 
807.98 
810.52 

800.61 
803.15 
805.69 
808.23 
810.77 

800.86 

803.40 
805.94 
808.48 

811.02 

801.12 
803.66 
806.20 

808.74 
811.28 

801.37 
803.91 
806.45 
808.99 
8H.53 

801.63 
804.17 
806.71 
809.25 
811.79 

Soi.SS 
804.42 
806.96 
809.50 
812.04 

802.13 
804.67 
807.21 

809.75 
812.29 

802.39 

804.93 

807.47 
810.01 
812.55 

32.00 

812.80 

Inch,     o.ooi       0.002      0.003      0.004       0.005       0.006       0.007       0.008      0.009 
mm.      0.025      0.051       0.076       0.102       0.127       0.152       0.178      0.203       0.229 

SMITHSONIAN  TABLEP 


166 


TABLE   65, 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

0 

' 

2 

3 

4 

5 

6 

7 

8 

9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

0 

O.OOOO 

0.0394 

0.0787 

0.1181 

0.1575 

0.1968 

0.2362 

0.2756 

0.3150 

0-3543 

10 

0-3937 

0.4331 

0.4724 

0.5118 

0.5512 

0.5906 

0.6299 

0.6693 

0.7087 

0.7480 

20 

0.7874 

0.8268 

0.8661 

0.9055 

0.9449 

0.9842 

1.0236 

1.0630 

I.IO24 

I.I4I7 

3° 

1.1811 

1.2205 

1.2598 

1.2992 

1.3386 

1.3780 

I.4I73 

1.4567 

1.4961 

1-5354 

40 

1.5748 

1.6142 

1.6535 

1.6929 

1.7323 

I.77I6 

1.8110 

1.8504 

1.8898 

1.9291 

50 

1.9685 

2.0079 

2.0472 

2.0866 

2.1260 

2.1654 

2.2047 

2.2441 

2.2835 

2.3228 

60 

2.3622 

2.4016 

2.4409 

2.4803 

2.5197 

2.5590 

2.5984 

2.6378 

2.6772 

2.7165 

70 

2-7559 

2.7953 

2.8346 

2.8740 

2.9134 

2.9528 

2.9921 

3-0315 

3.0709 

3.1102 

80 

3.1496 

3.1890 

3.2283 

3.2677 

3.3071 

3.3464 

3-3858 

34252 

3.4646 

3.5039 

90 

3-5433 

3.5828 

3.6220 

3.6614 

3.7008 

3.7402 

3-7795 

3-8189 

3.8583 

3.8976 

100 

3-9370 

3-9764 

4-0157 

4.0551 

4.0945 

4.1338 

4.1732 

4.2126 

4.2520 

4.2913 

no 

4.3307 

4.3701 

4.4094 

44488 

4.4882 

4.5276 

4.5669 

4.6063 

4.6457 

4.6850 

1  20 

4.7244 

4.7638 

4.8031 

4.8425 

4.8819 

4.9212 

4.9606 

5.0000 

5.0394 

5-0787 

130 

5.1181 

5-1575 

5.1968 

5.2362 

5.2756 

5.3150 

5.3543 

5-3937 

54331 

54724 

140 

5.5H8 

5-5512 

5.5905 

5.6299 

5.6693 

5.7086 

5.7480 

5.7874 

5.8268 

5.8661 

150 

5.9055 

5-9449 

5.9842 

6.0236 

6.0630 

6.1024 

6.1417 

6.1811 

6.2205 

6.2598 

160 

6.2992 

6.3386 

6-3779 

6.4173 

6.4567 

6.4960 

6-5354 

6.5748 

6.6142 

6.6535 

170 

6.6929 

6.7323 

6.7716 

6.8IIO 

6.8504 

6.8898 

6.9291 

6.9685 

7.0079 

7.0472 

180 

7.0866 

7.1260 

7.1653 

7.2047 

7.2441 

7.2834 

7.3228 

7.3622 

7.4016 

74409 

190 

7.4803 

7.5197 

7.5590 

7.5984 

7.6378 

7.6772 

7.7165 

7-7559 

7-7953 

7-8346 

200 

7-8740 

7.9134 

7.9527 

7.9921 

8.0315 

8.0708 

8.1  102 

8.1496 

8.1890 

8.2283 

210 

8.2677 

8.3071 

8.3464 

8.3858 

8.4252 

8.4646 

8.5039 

8-5433 

8.5827 

8.6220 

220 

8.6614 

8.7008 

8.7401 

8.7795 

8.8189 

8.8582 

8.8976 

8.9370 

8.9764 

9-0157 

230 

9.055I 

9.0945 

9.!338 

9.1732 

9.2126 

9.2520 

9.2913 

9.3307 

9.3701 

9.4094 

24O 

9.4488 

9.4882 

9.5275 

9.5669 

9.6063 

9.6456 

9.6850 

9.7244 

9.7638 

9.8031 

250 

9.8425 

9.8819 

9.9212 

9.9606 

10.0000 

10.0394 

10.0787 

10.1181 

io.i575 

10.1968 

260 

10.2362 

10.2756 

10.3149 

10.3543 

10.3937 

10.4330 

10.4724 

10.5118 

10.5512 

10.5905 

270 

10.6299 

10.6693 

10.7086 

10.7480 

10.7874 

10.8268 

10.8661 

10.9055 

10.9449 

10.9842 

280 

11.0236 

11.0630 

11.1023 

II.I4I7 

11.1811 

II.22O4 

11.2598 

11.2992 

H.3338 

11.3779 

290 

II4I73 

11.4568 

1  1  .4960 

n-5354 

11.5748 

11.6142 

11.6535 

11.6929 

11.7323 

11.7716 

300 

11.8110 

11.8504 

11.8897 

11.9291 

11.9685 

12.0078 

12.0472 

12.0866 

12.1260 

12.1653 

310 

12.2047 

12.2441 

12.2834 

12.3228 

12.3622 

12.4016 

12.4409 

12.4803 

12.5197 

12.559° 

320 

12.5984 

12.6378 

12.6771 

12.7165 

12.7559 

12.7952 

12.8346 

12.8740 

12.9134 

12.9527 

330 

12.9921 

13-0315 

13.0708 

13.1102 

13.1496 

13.1890 

13.2283 

13.2677 

13.3071 

13-3464 

340 

13-3858 

13-4252 

134645 

13-5039 

13.5433 

13.5826 

13.6220 

13.6614 

13.7008 

13.7401 

350 

13-7795 

13.8189 

13-8582 

13-8976 

13.9370 

13.9764 

14.0157 

14-0551 

14.0945 

U.I338 

360 

14.1732 

14.2126 

14.2519 

14.2913 

14.3307 

14.3700 

14.4094 

14.4488 

14.4882 

I4.5275 

370 

14.5669 

14.6063 

14.6456 

14.6850 

14.7244 

14.7638 

14.8031 

14.8425 

14.8819 

14.9212 

380 

14.9606 

15.0000 

15.0393 

15.0787 

15.1181 

15.1574 

15.1968 

15.2362 

15.2756  15.3149 

390 

T5-3543 

15.3937 

15433° 

15.4724 

15.5118 

15.5512 

15.5905 

15-6299 

15.6693 

15.7086 

400 

15.7480 

157874 

15.8267 

15.8661 

15.9055 

15.9448 

15.9842 

16.0236 

16.0630 

16.1023 

Tenths  of  a  millimetre. 

Hundredths  of  a  millimetre. 

mm. 

Inch.     mm.     Inch. 

mm. 

Inch.     mm.      Inch. 

O.I 

0.0039      0.6      0.0236 

O.OI 

0.0004      °-°6      0.0024 

.2 

.0079       .7       .0276 

.02 

.0008       .07       .0028 

•3 

.0118       .S       .0315 

•03 

.0012      .08       .0031 

•4 

.0157       -9       -0354 

.04 

.0016      .09       .0035 

•5 

•0197      i.o       .0394 

.05 

.0020      .10       .0039 

SMITHSONIAN  TABLES. 


187 


TABLE  65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

400 

15.748 

15.752 

15.756 

15.760 

15.764 

15.768 

15.772 

15.776 

15.779 

15.783 

401 

15.787 

I5.791 

15-795 

15-799 

15.803 

15.807 

I5.8II 

15.815 

15.819 

15.823 

402 

15.827 

15.831 

15.835 

15.839 

15.842 

15.846 

15.850 

15.854 

15-858 

15.862 

403 

15-866 

15.870 

15.874 

15.878 

15.882 

15.886 

15.890 

15.894 

15.898 

15.902 

404 

15.905 

15.909 

I5.9!3 

15.917 

15.921 

15.925 

I5.929 

15-933 

15.937 

15.941 

405 

15.945 

15-949 

15.953 

15.957 

15.961 

15.965 

15.968 

15.972 

15.976 

15.980 

406 

15.984 

15.988 

15.992 

15.996 

16.000 

16.004 

16.008 

16.012 

16.016 

I6.O2O 

407 

16.024 

16.028 

16.031 

16.035 

16.039 

16.043 

16.047 

16.051 

16.055 

16.059  j 

408 

16.063 

16.067 

16.071 

16.075 

16.079 

16.083 

16.087 

16.091 

16.094 

16.098 

409 

16.102 

1  6.106 

16.110 

16.114 

16.118 

I6.I22 

I6.I26 

16.130 

16.134 

16.138 

410 

16.142 

16.146 

16.150 

16.154 

16.157 

16.  161 

16.165 

16.169 

16.173 

16.177 

411 

16.181 

16.185 

16.189 

16.193 

16.197 

16.201 

16.205 

16.209 

16.213 

16.217 

412 

16.220 

16.224 

16.228 

16.232 

16.236 

16.240 

16.244 

16.248 

16.252 

16.256 

413 

16.260 

16.264 

16.268 

16.272 

16.276 

16.279 

16.283 

16.287 

16.291 

16.295 

414 

16.299 

16.303 

16.307 

16.311 

16.315 

16.319 

16.323 

16.327 

16.331 

16.335 

415 

16.339 

16.342 

16.346 

16.350 

16.354 

16.358 

16.362 

16.366 

16.370 

16.374 

416 

16.378 

16.382 

16.386 

16.390 

16.394 

16.398 

16.402 

16.405 

16.409 

16.413 

417 

16.417 

16.421 

16.425 

16.429 

16.433 

16.437 

16.441 

16.445 

16.449 

16.453 

418 

16.457 

16.461 

16.465 

16.468 

16.472 

16.476 

16.480 

16.484 

16.488 

16.492 

419 

16.496 

16.500 

16.504 

16.508 

16.512 

16.516 

16.520 

16.524 

16.528 

16.531 

420 

16.535 

16.539 

16.543 

16.547 

16.551 

16.555 

16.559 

16.563 

16.567 

16.571 

421 

16.575 

16.579 

16.583 

16.587 

16.591 

16.594 

16.598 

16.602 

16.606 

16.610 

422 

16.614 

16.618 

16.622 

16.626 

16.630 

16.634 

16.638 

16.642 

16.646 

16.650  1 

423 

16.654 

16.657 

16.661 

16.665 

16.669 

16.673 

16.677 

16.681 

16.685 

16.689 

424 

16.693 

16.697 

16.701 

16.705 

16.709 

16.713 

16.717 

16.720 

16.724 

16.728 

425 

16.732 

16.736 

16.740 

16.744 

16.748 

16.752 

16.756 

16.760 

16.764 

16.768 

426 

16.772 

16.776 

16.779 

16.783 

16.787 

16.791 

16.795 

16.799 

16.803 

16.807 

427 

16.811 

16.815 

16.819 

16.823 

16.827 

16.831 

16.835 

16.839 

16.842 

16.846 

428 

16.850 

16.854 

16.858 

16.862 

16.866 

16.870 

16.874 

16.878 

16.882 

16.886 

429 

16.890 

16.894 

16.898 

16.902 

16.905 

16.909 

16.913 

16.917 

16.921 

16.925 

430 

16.929 

16.933 

16.937 

16.941 

16.945 

16.949 

16.953 

16.957 

16.961 

16.965 

43i 

16.968 

16.972 

16.976 

16.980 

16.984 

16.988 

16.992 

16.996 

17.000 

17.004 

432 

17.008 

17.012 

17.016 

17.020 

17.024 

17.028 

17.031 

17-035 

17.039 

17-043 

433 

17.047 

17.051 

17-055 

17.059 

17.063 

17.067 

17.071 

I7.075 

17.079 

17.083 

434 

17.087 

17.091 

17.094 

17.098 

17.102 

17.106 

I7.IIO 

17.114 

17.118 

17.122 

435 

17.126 

17.130 

17.134 

17.138 

17.142 

17.146 

17.150 

I7.I54 

I7.I57 

17.161 

436 

17.165 

17.169 

17.173 

17.177 

17.181 

17.185 

17.189 

17.193 

17.197 

17.201 

437 

17.205 

17.209 

17.213 

17.217 

17.220 

17.224 

17.228 

17.232 

17.236 

17.240 

438 

17.244 

17.248 

17.252 

17.256 

17.260 

17.264 

17.268 

17.272 

17.276 

17.279 

439 

17.283 

17.287 

17.291 

17.295 

17.299 

17-303 

17.307 

17.311 

i7.3!5 

17.319 

440 

17.323 

17.327 

I7.33I 

17.335 

17.339 

17.342 

17.346 

17.350 

17.354 

17.358 

441 

17.362 

17.366 

17.370 

17.374 

17.378 

17.382 

17.386 

17.390 

17.394 

17.398  ! 

442 

17.402 

17.405 

17.409 

17.413 

17.417 

17.421 

17.425 

17.429 

17-433 

17-437 

443 

17.441 

17.445 

17.449 

17-453 

17.457 

17.461 

I7.465 

17.468 

17.472 

17.476 

444 

17.480 

17.484 

17.488 

17.492 

17.496 

17.500 

17.504 

17-508 

17.512 

17.516 

445 

17.520 

17-524 

17-528 

17.531 

17.535 

17-539 

17.543 

17.547 

I7.55I 

17.555 

446 

17.559 

17-563 

17-567 

17.571 

17-575 

17-579 

17.583 

17.587 

I7-591 

17-594 

447 

17.598 

17.602 

17.606 

17.610 

17.614 

17.618 

17.622 

17.626 

17.630 

17-634 

448 

17.638 

17.642 

17.646 

17.650 

17.654 

17.657 

I7.66I 

17.665 

17.669 

17.673 

449 

17.677 

17.681 

17-685 

17.689 

17.693 

17.697 

17.701 

17-705 

17.709 

17.713 

450 

17.717 

17.720 

17.724 

17.728 

17.732 

17.736 

17.740 

17-744 

17.748 

17.752 

SMITHSONIAN  TABLES. 


188 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

• 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

450 

17.717 

17.720 

17.724 

17.728 

17.732 

17.736 

17.740 

17-744 

17.748 

T7.752 

45r 

17.756 

17.760 

17.764 

17.768 

17.772 

17.776 

17.779 

17.783 

17.787 

17.791 

452 

17-795 

17.799 

17.803 

17.807 

I7.8II 

17.815 

.17.819 

17.823 

17.827 

17.831 

453 

17.835 

17.839 

17.842 

17.846 

17.850 

I7-854 

17.858 

17.862 

17.866 

17.870 

454 

17.874 

17.878 

17.882 

17.886 

17.890 

17.894 

17.898 

17.902 

I7.905 

17.909 

455 

i7-9T3 

17.917 

17.921 

17.925 

17.929 

17-933 

17-937 

17.941 

17-945 

17-949 

456 

17.953 

17-957 

17.961 

I7.965 

17.968 

17.972 

17.976 

17.980 

17.984 

17.988 

457 

17.992 

17.996 

iS.OOO 

18.004 

18.008 

18.012 

18.016 

18.020 

18.024 

18.028 

458 

18.031 

18.035 

18.039 

18.043 

18.047 

18.051 

18.055 

18.059 

18.063 

18.067 

459 

18.071 

18.075 

18.079 

18.083 

18.087 

18.091 

18.094 

18.098 

18.102 

18.106 

460 

18.110 

18.114 

18.118 

18.122 

18.126 

18.130 

18.134 

18.138 

18.142 

18.146 

461 

18.150 

18.154 

18.157 

18.161 

18.165 

18.169 

18.173 

18.177 

18.181 

18.185 

462 

18.189 

18.193 

18.197 

18.201 

18.205 

18.209 

18.213 

18.216 

18.220 

18.224 

463 

18.228 

18.232 

18.236 

18.240 

18.244 

18.248 

18.252 

18.256 

18.260 

18.264 

464 

18.268 

18.272 

18.276 

18.279 

18.283 

18.287 

18.291 

18.295 

18.299 

18.303 

465 

18.307 

18.311 

18.315 

18.319 

18.323 

18.327 

18.331 

18.335 

18.339 

18.342 

466 

18.346 

18.350 

18.354 

18.358 

18.362 

18.366 

18.370 

18.374 

18.378 

18.382 

467 

18.386 

[8.390 

18.394 

18.398 

18.402 

18.405 

18.409 

18.413 

18.417 

18.421 

468 

18.425 

18.429 

18.433 

18.437 

18.441 

18.445 

18.449 

18.453 

18.457 

18.461 

469 

18.465 

18.468 

18.472 

18.476 

18.480 

18.484 

18.488 

18.492 

18.496 

18.500 

470 

18.504 

18.508 

18.512 

18.516 

18.520 

18.524 

18.528 

18.531 

18.535 

18.539 

47i 

18.543 

18.547 

18.551 

18.555 

18.559 

18.563 

18.567 

18.571 

18.575 

18.579 

472 

18.583 

18.587 

18.591 

18.594 

18.598 

18.602 

18.606 

18.610 

18.614 

18.618 

473 

18.622 

18.626 

18.630 

18.634 

18.638 

18.642 

18.646 

18.650 

18.654 

18.657 

474 

18.661 

18.665 

18.669 

18.673 

18.677 

18.681 

18.685 

18.689 

18.693 

18.697 

475 

18.701 

18.705 

18.709 

18.713 

18.716 

18.720 

18.724 

18.728 

18.732 

18.736 

476 

18.740 

18.744 

18.748 

18.752 

18.756 

18.760 

18.764 

18.768 

18.772 

18.776 

477 

18.779 

18.783 

18.787 

18.791 

18.795 

18.799 

18.803 

18.807 

18.811 

18.815 

478 

18.819 

18.823 

18.827 

18.831 

18.835 

18.839 

18.842 

18.846 

18.850 

18.854 

479 

18.858 

18.862 

18.866 

18.870 

18.874 

18.878 

18.882 

18.886 

18.890 

18.894 

480 

18.898 

18.902 

18.905 

18.909 

18.913 

18.917 

18.921 

18.925 

18.929 

18.933 

481 

18.937 

18.941 

i8.945 

18.949 

18.953 

18.957 

18.961 

18.965 

18.968 

18.972 

482 

18.976 

18.980 

18.984 

18.988 

18.992 

18.996 

19.000 

19.004 

19.008 

19.012 

483 

19.016 

19.020 

19.024 

19.028 

19.031 

19.035 

19.039 

19.043 

19.047 

19.051 

484 

I9.055 

I9.059 

19.063 

19.067 

19.071 

19-075 

19.079 

19.083 

19.087 

19.091 

485 

19.094 

19.098 

19.102 

19.106 

19.110 

19.114 

19.118 

19.122 

19.126 

19.130 

486 

19.134 

19.138 

19.142 

19.146 

19.150 

19.154 

19.157 

19.161 

19.165 

19.169 

487 

I9.I73 

19.177 

19.181 

19.185 

19.189 

I9.I93 

19.197 

19.201 

19.205 

19.209 

488 

19.213 

19.216 

19.220 

19.224 

19.228 

19.232 

19.236 

19.240 

19.244 

19.248 

489 

19.252 

I9.256 

19.260 

19.264 

19.268 

19.272 

19.276 

19.279 

19.283 

19.287 

490 

19.291 

I9.295 

19.299 

19-303 

19.307 

19.311 

I9-3I5 

I9-3I9 

19.323 

19.327 

491 

19-331 

I9.335 

I9.339 

I9.342 

19.346 

I9-350 

19-354 

19.358 

19.362 

19.366 

492 

19.370 

19.374 

19-378 

19.382 

19.386 

19.390 

19.394 

I9-398 

19.402 

19-405 

493 

19.409 

I9.4I3 

19.417 

19.421 

19.425 

19.429 

19-433 

19.437 

19.441 

I9.445 

494 

19.449 

19-453 

19-457 

19.461 

19.465 

19.468 

19.472 

19.476 

19.480 

19.484 

495 

19.488 

19.492 

19.496 

19.500 

I9-504 

19-508 

19.512 

19.516 

19-520 

19-524 

496 

19.528 

19.531 

19-535 

19.539 

19-543 

19.547 

I9.55I 

19.555 

!9-559 

19-563 

497 

19-567 

19.571 

19.575 

19.579 

I9.583 

19-587 

19.591 

19-594 

19-598 

19.602 

498 

19.606 

19.610 

19.614 

19.618 

19.622 

19.626 

19.630 

19.634 

19.638 

19.642 

499 

19.646 

19.650 

19.654 

19-657 

19.661 

19.665 

19.669 

19-673 

19.677 

19.681 

500 

19-685 

19.689 

19.693 

19.697 

19.701 

19-705 

19.709 

19.713 

19.716 

19.720 

SMITHSONIAN  TABLES. 


189 


TABLE  65 


MILLIMETRES    INTO    INCHES. 

i  mm.  —  0.03937  inch. 


Milli- 
metres. 

.0 

' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

500 

19.685 

19.689 

19.693 

19.697 

19.701 

19.705 

19.709 

I9-7I3 

19.716 

19.720 

5oi 

19.724 

19.728 

19.732 

19.736 

19.740 

19-744 

19.748 

I9-752 

I9-756 

19.760 

502 

19.764 

19.768 

19.772 

19.776 

[9.779 

19.783 

19.787 

19.791 

T9-795 

19.799 

503 

19.803 

19.807 

19.811 

19.815 

19.819 

19.823 

19.827 

19.831 

I9-835 

19.839 

504 

19.842 

19.846 

19.850 

I9.854 

19.858 

19.862 

19.866 

19.870 

19.874 

19.878 

505 

19.882 

19.886 

19.890 

19.894 

19.898 

19.902 

I9-905 

19.909 

I9-9I3 

19.917 

506 

19.921 

19.925 

19.929 

19-933 

19-937 

19.941 

19-945 

19.949 

T9-953 

J9-957 

507 

19.961 

19.965 

19.968 

19.972 

19.976 

19.980 

19.984 

19.988 

19.992 

19.996 

508 

2O.OOO 

20.004 

20.008 

20.012 

20.016 

20.020 

20.024 

20.028 

20.031 

20.035 

509 

20.039 

20.043 

20.047 

20.051 

20.055 

20.059 

20.063 

20.067 

20.071 

20.075 

510 

20.079 

20.083 

20.087 

20.091 

20.094 

20.098 

2O.  IO2 

20.  106 

20.  no 

20.114 

5ii 

20.II8 

20.122 

20.126 

20.  130 

20.134 

20.138 

20.  142 

20.146 

20.150 

20.154 

512 

20.157 

20.161 

20.  165 

20.  169 

20.173 

20.177 

20.  181 

20.185 

20.189 

20.193 

513 

20.197 

20.201 

20.  2O5 

20.  209 

20.213 

2O.2I6 

20.220 

20.224 

20.228 

20.232 

514 

20.236 

20.240 

20.  244 

2O.248 

20.252 

20.256 

20.  260 

20.264 

20.268 

20.272 

515 

20.276 

20.279 

20.283 

20.287 

20.291 

20.295 

20.299 

20.303 

20.307 

20.311 

5i6 

20.315 

20.319 

20.323 

20.327 

20.331 

20.335 

20.339 

20.342 

20.346 

20.350 

517 

20.354 

20.358 

20.362 

20.366 

20.370 

20.374 

20.378 

20.382 

20.386 

20.390 

5i8 

20.394 

20.398 

20.402 

20.405 

20.409 

20.413 

20.417 

20.421 

20.425 

20.429 

519 

20.433 

20.437 

20.441 

20.445 

20.449 

20.453 

20.457 

20.461 

20.465 

20.468 

520 

20.472 

20.476 

20.480 

20.484 

20.488 

20.492 

20.496 

20.500 

20.504 

20.508 

521 

20.512 

20.516 

2O.52O 

20.524 

20.528 

20.531 

20.535 

20.539 

20.543 

20.547 

522 

20.551 

20-555 

20.559 

20.563 

20.567 

20.571 

20.575 

20.579 

20.583 

20.587 

523 

20.591 

20.594 

20.598 

2O.6O2 

2O.6o6 

20.6lO 

20.614 

20.618 

20.622 

20.626 

524 

20.630 

20.634 

20.638 

2O.642 

20.646 

20.  650 

20.654 

20.657 

20.661 

20.665 

525 

20.669 

20.673 

20.677 

20.681 

20.685 

20.689 

20.693 

20.697 

20.701 

20.705 

526 

20.709 

20.713 

20.716 

20.720 

20.724 

2O.728 

20.732 

20.736 

20.740 

20.744 

527 

20.748 

20.752 

20.756 

20.760 

20.764 

20.768 

20.772 

20.776 

20.779 

20.783 

528 

20.787 

20.791 

20.795 

20.799 

20.803 

2O.8O7 

20.811 

20.815 

20.819 

20.823 

529 

20.827 

20.831 

20.835 

20.839 

20.842 

20.846 

20.  850 

20.854 

20.858 

20.862 

530 

20.866 

2O.87O 

2O.874 

20.878 

20.882 

20.886 

20.890 

20.894 

20.898 

20.  902 

53i 

20.905 

20.909 

20.913 

20.917 

20.921 

20.925 

20.929 

20.933 

20.937 

20.941 

532 

20.945 

20.949 

20-953 

20.957 

20.961 

20.965 

20.968 

20.972 

20.976 

20.  980 

533 

20.984 

20.988 

20.992 

20.996 

2I.OOO 

21.004 

21.008 

21.012 

21.016 

21.020 

534 

21.024 

2I.O28 

21.031 

21.035 

21.039 

21.043 

21.047 

21.051 

21.055 

21.059 

535 

21.063 

21.067 

21.071 

21.075 

21.079 

21.083 

21.087 

21.091 

21.094 

21.098 

536 

21.102 

21.106 

21.110 

21.114 

21.118 

21.122 

21.126 

21.130 

21.134 

21.138 

537 

21.142 

21.146 

21.150 

21.154 

21.157 

21.161 

21.165 

21.169 

21.173 

21.177 

538 

21.181 

21.185 

21.189 

21.193 

21.197 

2I.2OI 

21.205 

21.209 

21.213 

2I.2I6 

539 

21.220 

21.224 

21.228 

21.232 

21.236 

2I.24O 

21.244 

21.248 

21.252 

21.256 

540 

2I.26O 

21.264 

21.268 

21.272 

21.276 

21.279 

21.283 

21.287 

21.291 

21.295 

541 

21.299 

21.303 

21.307 

21.311 

21.315 

21.319 

21.323 

21.327 

21.331 

21-335 

542 

21-339 

21.342 

21.346 

21.350 

21.354 

2L358 

21.362 

21.366 

21.370 

21-374 

543 

21.378 

21.382 

21.386 

21.390 

21.394 

21.398 

21.402 

21.405 

21.409 

21.413 

544 

21.417 

21.421 

21.425 

21.429 

21.433 

21-437 

21.441 

21.445 

21.449 

21-453 

545 

21-457 

21.461 

21.465 

21.468 

21.472 

21.476 

21.480 

21.484 

21.488 

21.492 

546 

21.496 

21.500 

21.504 

21.508 

21.512 

2I.5I6 

21.520 

21.524 

21.528 

21.531 

547 

21.535 

21.539 

21.543 

21-547 

21.551 

2L555 

21.559 

21.563 

21.567 

21.571 

548 

21-575 

21.579 

21.583 

21.587 

21.591 

21-594 

21.598 

21.602 

21.606 

21.610 

549 

2I.6I4 

21.618 

21.622 

21.626 

21.630 

21.634 

21.638 

21.642 

21.646 

21.650 

550 

21.654 

21.657 

2I.66I 

21.665 

.21.669 

21.673 

21.677 

2I.68I 

21.685 

21.689 

SMITHSONIAN  TABLES. 


IQO 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
meires. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

550 

21.654 

21.657 

21.661 

21.665 

21.669 

21.673 

21.677 

2I.68I 

21.685 

21.689 

55i 

21.693 

21.697 

2I.7OI 

21.705 

21.709 

21.713 

21.716 

21.720 

21.724 

21.728 

552 

21.732 

21.736 

21.740 

21.744 

21.748 

21.752 

21.756 

21.760 

21.764 

21.768 

553 

21.772 

21.776 

21.779 

21.783 

21.787 

21.791 

21.795 

21-799 

21.803 

21.807 

554 

2I.8II 

2I.8I5 

21.819 

21.823 

21.827 

21.831 

21.835 

21.839 

21.842 

21.846 

555 

21.850 

21.854 

21.858 

21.862 

21.866 

21.870 

21.874 

21.878 

21.882 

21.886 

556 

21.890 

21.894 

21.898 

21.902 

21.905 

21.909 

21.913 

21.917 

21.921 

21.925 

557 

21.929 

21-933 

21.937 

21.941 

21-945 

21.949 

21-953 

21-957 

21.961 

21.965 

558 

21.968 

21.9/2 

21.976 

21.980 

21.984 

21.988 

21.992 

21.996 

22.OOO 

22.004 

559 

22.OO8 

22.012 

22.016 

22.O2O 

22.024 

22.028 

22.031 

22.035 

22.039 

22.043 

560 

22.047 

22.051 

22.055 

22.059 

22.063 

22.067 

22.071 

22.075 

22.079 

22.083 

56i 

22.087 

22.091 

22.094 

22.098 

22.102 

22.106 

22.110 

22.114 

22.118 

22.122 

562 

22.126 

22.I3O 

22.134 

22.138 

22.142 

22.146 

22.150 

22.153 

22.157 

22.l6l 

563 

22.165 

22.169 

22.173 

22.177 

22.l8l 

22.185 

22.189 

22.193 

22.197 

22.2OI 

564 

22.205 

22.2O9 

22.213 

22.2l6 

22.22O 

22.224 

22.228 

22.232 

22.236 

22.24O 

565 

22.244 

22.248 

22.252 

22.256 

22.26O 

22.264 

22.268 

22.272 

22.276 

22.279 

566 

22.283 

22.287 

22.291 

22.295 

22.299 

22.303 

22307 

22.311 

22.315 

22.319 

567 

22.323 

22.327 

22.331 

22.335 

22.339 

22.342 

22.346 

22.350 

22-354 

22.358 

568 

22.362 

22.366 

22.370 

22.374 

22.378 

22.382 

22.386 

22.390 

22.394 

22.398 

569 

22.402 

22.405 

22.409 

22.413 

22.417 

22.421 

22.425 

22.429 

22.433 

22.437 

570 

22.441 

22.445 

22.449 

22.453 

22.457 

22.461 

22.465 

22.468 

22.472 

22.476 

57i 

22.480 

22.484 

22.488 

22.492 

22.496 

22.500 

22.504 

22.508 

22.512 

22.516 

572 

22.520 

22.524 

22.528 

22.531 

22-535 

22.539 

22.543 

22.547 

22.551 

22-555 

573 

22-559 

22.563 

22.567 

22.571 

22-575 

22.579 

22.583 

22.587 

22.591 

22.594 

574 

22.598 

22.6O2 

22.606 

22.610 

22.614 

22.6l8 

22.622 

22.626 

22.630 

22.634 

575 

22.638 

22.642 

22.646 

22.650 

22.653 

22.657 

22.661 

22.665 

22.669 

22.673 

576 

22.677 

22.681 

22.685 

22.689 

22.693 

22.697 

22.701 

22.705 

22.709 

22.713 

577 

22.716 

22.72O 

22.724 

22.728 

22.732 

22.736 

22.740 

22.744 

22.748 

22.752 

578 

22.756 

22.760 

22.764 

22.768 

22.772 

22.776 

22.779 

22.783 

22.787 

22.791 

579 

22.795 

22.799 

22.803 

22.807 

22.8II 

22.815 

22.819 

22.823 

22.827 

22.831 

580 

22.835 

22.839 

22.842 

22.846 

22.850 

22.854 

22.858 

22.862 

22.866 

22.87O 

58i 

22.874 

22.878 

22.882 

22.886 

22.890 

22.894 

22.898 

22.902 

22.905 

22.909 

582 

22.913 

22.917 

22.921 

22.925 

22.929 

22.933 

22.937 

22.941 

22.945 

22.949  ! 

583 

22-953 

22.957 

22.961 

22.965 

22.968 

22.972 

22.976 

22.980 

22.984 

22.988 

584 

22.992 

22.996 

23.000 

23.004 

23.008 

23.012 

23.016 

23.020 

23.024 

23.028 

585 

23.031 

23.035 

23.039 

23.043 

23.047 

23-051 

23.055 

23-059 

23.063 

23.067 

586 

23.071 

23.075 

23.079 

23-083 

23.087 

23.091 

23.094 

23.098 

23.102 

23.106 

587 

23.110 

23.114 

23.118 

23.122 

23.126 

23.130 

23-I34 

23.138 

23.142 

23.146 

588 

23.150 

23.I53 

23.157 

23.161 

23.165 

23.169 

23.173 

23.177 

23.181 

23-185 

589 

23.189 

23.193 

23.197 

23.201 

23.205 

23.209 

23.213 

23.216 

23.220 

23.224 

590 

23.228 

23.232 

23.236 

23.240 

23.244 

23.248 

23.252 

23.256 

23.260 

23.264 

59i 

23.268 

23.272 

23.276 

23.279 

23-283 

23.287 

23.291 

23-295 

23.299 

23-303 

592 

23.307 

23.3H 

23.3I5 

23-319 

23.323 

23.327 

23.33I 

23-335 

23.339 

23.342 

593 

23-346 

23.350 

23-354 

23.358 

23.362 

23.366 

23.370 

23.374 

23.378 

23.382 

594 

23.386 

23.390 

23-394 

23.398 

23.402 

23.405 

23.409 

23-413 

23.417 

23.421 

595 

23-425 

23.429 

23-433 

23.437 

23.441 

23-445 

23-449 

23-453 

23.457 

23.461 

596 

23.465 

23.468 

23.472 

23476 

23.480 

23.484 

23.488 

23-492 

23.496 

23.500 

597 

23.504 

23.508 

23.512 

23-5^6 

23.520 

23.524 

23.528 

23.531 

23.535 

23-539 

598 

23-543 

23.547 

23.551 

23-555 

23.559 

23.563 

23.567 

23-571 

23-575 

23-579 

599 

23.583 

23.587 

23.591 

23.594 

23.598 

23.602 

23.606 

23.610 

23.614 

23.618 

600 

23.622 

23.626 

23.630 

23-634 

23.638 

23.642 

23.646 

23-650 

23.653 

23.657 

SMITHSONIAN  TABLES. 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

-' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

600 

23.622 

23.626 

23.630 

23.634 

23.638 

23-642 

23.646 

23.650 

23.653 

23.657 

601 

23.661 

23-665 

23.669 

23.673 

23.6/7 

23.681 

23-685 

23.689 

23.693 

23-697 

602 

23.701 

23.705 

23.709 

23.7I3 

23.716 

23.720 

23.724 

23.728 

23.732 

23.736 

603 

23.740 

23-744 

23.748 

23.752 

23.756 

23.760 

23-764 

23.768 

23.772 

23.776 

604 

23.779 

23.783 

23.787 

23.791 

23.795 

23.799 

23-803 

23.807 

23.811 

23.815 

605 

23.819 

23.823 

23.827 

23.831 

23.835 

23.839 

23-842 

23.846 

23.850 

23.854 

606 

23-858 

23.862 

23.866 

23.870 

23.874 

23.878 

23.882 

23.886 

23.890 

23.894 

607 

23-898 

23.902 

23.905 

23.909 

23.913 

23.917 

23.921 

23.925 

23.929 

23.933 

608 

23.937 

23.941 

23.945 

23-949 

23.953 

23-957 

23.961 

23.965 

23.968 

23.972 

609 

23.976 

23.980 

23.984 

23.988 

23.992 

23.996 

24.000 

24.004 

24.008 

24.012 

610 

24.016 

24.020 

24.024 

24.028 

24.031 

24.035 

24.039 

24.043 

24.047 

24.051 

611 

24.055 

24.059 

24.063 

24.067 

24.071 

24.075 

24.079 

24.083 

24.087 

24.091 

612 

24.094 

24.098 

24.  IO2 

24.106 

24.110 

24.114 

24.118 

24.122 

24.126 

24.130 

613 

24.134 

24.138 

24.  142 

24.  146 

24.150 

24.153 

24.157 

24.161 

24.165 

24.169 

614 

24.173 

24.177 

24.l8l 

24.185 

24.  189 

24.I93 

24.197 

24.201 

24.205 

24.209 

615 

24.213 

24.216 

24.220 

24.224 

24.228 

24.232 

24.236 

24.240 

24.244 

24.248 

616 

24.252 

24.256 

24.260 

24.264 

24.268 

24.272 

24.276 

24.279 

24.283 

24.287 

617 

24.291 

24.295 

24.299 

24.303 

24.307 

24.311 

24.315 

24.319 

24.323 

24.327 

618 

24.331 

24.335 

24.339 

24.342 

24.346 

24.350 

24.354 

24.358 

24.362 

24-366 

619 

24.370 

24-374 

24.378 

24.382 

24.386 

24.390 

24.394 

24.398 

24.402 

24.405 

620 

24.409 

24.413 

24.417 

24.421 

24.425 

24.429 

24-433 

24437 

24.441 

24.445 

621 

24.449 

24-453 

24-457 

24.461 

24.465 

24.468 

24.472 

24.476 

24.480 

24.484 

622 

24.488 

24.492 

24.496 

24.500 

24.504 

24.508 

24.512 

24.516 

24.520 

24.524 

623 

24.528 

24.531 

24-535 

24.539 

24-543 

24.547 

24.551 

24.555 

24-559 

24-563 

624 

24.567 

24.57I 

24-575 

24.579 

24-583 

24.587 

24.591 

24.594 

24.598 

24.602 

625 

24.606 

24.610 

24.614 

24.618 

24.622 

24.626 

24.630 

24.634 

24.638 

24.642 

626 

24.646 

24.650 

24.653 

24.657 

24.661 

24.665 

24.669 

24.673 

24.677 

24.681 

627 

24.685 

24.689 

24.693 

24.697 

24.701 

24.705 

24.709 

24.713 

24.716 

24.720 

628 

24.724 

24.728 

24.732 

24.736 

24.740 

24-744 

24.748 

24.752 

24.756 

24.760 

629 

24.764 

24.768 

24.772 

24.776 

24.779 

24.783 

24.787 

24.791 

24.795 

24.799 

630 

24.803 

24.807 

24.8ll 

24.815 

24.819 

24.823 

24.827 

24.831 

24.835 

24.839 

631 

24.842 

24.846 

24.850 

24.854 

24.858 

24.862 

24.866 

24.870 

24.874 

24.878 

632 

24.882 

24.886 

24.890 

24.894 

24.898 

24.902 

24.905 

24.909 

24.913 

24.917 

633 

24.921 

24.925 

24.929 

24-933 

24-937 

24.941 

24.945 

24.949 

24-953 

24-957 

634 

24.961 

24.965 

24.968 

24.972 

24.976 

24.980 

24.984 

24.988 

24.992 

24.996 

635 

25.000 

25.004 

25.008 

25.012 

25.016 

25.020 

25.024 

25.028 

25.031 

25.035 

636 

25.039 

25.043 

25.047 

25.051 

25.055 

25.059 

25.063 

25-067 

25.071 

25.0/5 

637 

25.079 

25-083 

25.087 

25-091 

25.094 

25.098 

25.102 

25.106 

25.110 

25.114 

638 

25.118 

25.122 

25.126 

25.130 

25.134 

25.138 

25.142 

25.146 

25.150 

25.I53 

639 

25.157 

25.161 

25.165 

25-169 

25.173 

25.177 

25.181 

25.185 

25-189 

25.193 

640 

25.197 

25.201 

25.205 

25-209 

25.2I3 

25.216 

25.220 

25.224 

25.228 

25.232 

641 

25.236 

25.240 

25.244 

25.248 

25.252 

25-256 

25.260 

25.264 

25.268 

25.272 

642 

25.276 

25.279 

25.283 

25-287 

25.291 

25.295 

25.299 

25.303 

25.307 

25.3H 

643 

25.315 

25.319 

25.323 

25.327 

25.33I 

25-335 

25-339 

25.342 

25.346 

25.350 

644 

25-354 

25.358 

25.362 

25.366 

25.370 

25.374 

25.378 

25.382 

25.386 

25.390 

645 

25.394 

25.398 

25.402 

25.405 

25.409 

25.413 

25.417 

25.421 

25.425 

25429 

646 

25.433 

25-437 

25.441 

25.445 

25.449 

25-453 

25-457 

25.461 

25-465 

25.468 

647 

25.472 

25.476 

25.480 

25484 

25.488 

25.492 

25.496 

25.500 

25.504 

25.508 

648 

25.512 

25-516 

25.520 

25.524 

25.528 

25-531 

25.535 

25-539 

25-543 

25-547 

649 

25.551 

25-555 

25-559 

25.563 

25.567 

25.571 

25-575 

25-579 

25.583 

25.587 

650 

25-591 

25-594 

25.598 

25.602 

25.606 

25.610 

25.614 

25.618 

25.622 

25.626 

SMITHSONIAN  TABLES. 


IQ2 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

650 

25-591 

25-594 

25.598 

25.602 

25.606 

25.610 

25-614 

25.618 

25.622 

25.626 

651 

25.630 

25.634 

25-638 

25.642 

25-646 

25.650 

25.653 

25.657 

25.661 

25-665 

652 

25.669 

25.673 

25.677 

25.681 

25.685 

25-689 

25-693 

25.697 

25.701 

25.705 

653 

25.709 

25.713 

25.716 

25.720 

25.724 

25.728 

25.732 

25.736 

25.740 

25-744 

654 

25.748 

25.752 

25.756 

25.760 

25.764 

25.768 

25.772 

25.776 

25-779 

25.783 

655 

25.787 

25-791 

25.795 

25-799 

25-803 

25-807 

25.811 

25.815 

25.819 

25.823 

656 

25.827 

25-831 

25.835 

25.839 

25.842 

25.846 

25-850 

25.854 

25-858 

25.862 

657 

25.866 

25.870 

25.874 

25-878 

25.882 

25.886 

25.890 

25.894 

25-898 

25.902 

658 

25.905 

25-909 

25.913 

25-9*7 

25.921 

25.925 

25.929 

25.933 

25-937 

25.941 

659 

25-945 

25-949 

25.953 

25-957 

25.961 

25.965 

25.968 

25.972 

25.9/6 

25.980 

660 

25.984 

25-988 

25.992 

25.996 

26.OOO 

26.004 

26.008 

26.012 

26.016 

26.O2O 

66  1 

26.024 

26.028 

26.031 

26.035 

26.039 

26.043 

26.047 

26.051 

26.055 

26.059 

662 

26.063 

26.067 

26.071 

26.075 

26.079 

26.083 

26.087 

26.090 

26.094 

26.098 

663 

26.IO2 

26.  106 

26.IIO 

26.114 

26.118 

26.122 

26.126 

26.130 

26.134 

26.138 

664 

26.142 

26.146 

26.150 

26.153 

26.157 

26.161 

26.165 

26.169 

26.173 

26.177 

665 

26.l8l 

26.185 

26.189 

26.193 

26.  197 

26.2OI 

26.205 

26.  209 

26.213 

26.216 

666 

26.22O 

26.224 

26.228 

26.232 

26.236 

26.  240 

26.244 

26.248 

26.252 

26.256 

667 

26.260 

26.264 

26.268 

26.272 

26.276 

26.279 

26.283 

26.287 

26.291 

26.295 

668 

26.299 

26.303 

26.307 

26.311 

26.315 

26.319 

26.323 

26.327 

26.331 

26.335 

669 

26.339 

26.342 

26.346 

26.350 

26.354 

26.358 

26.362 

26.366 

26.370 

26.374 

670 

26.378 

26.382 

26.386 

26.390 

26.394 

26.398 

26.402 

26.405 

26.409 

26.413 

671 

26.417 

26.421 

26.425 

26.429 

26.433 

26.437 

26.441 

26.445 

26.449 

26.453 

672 

26.457 

26.461 

26.465 

26.468 

26.472 

26.476 

26.480 

26.484 

26.488 

26.492 

673 

26.496 

26.500 

26.504 

26.508 

26.512 

26.516 

26.520 

26.524 

26.528 

26.531 

674 

26.535 

26.539 

26.543 

26.547 

26.551 

26.555 

26.559 

26.563 

26.567 

26.571 

675 

26.575 

26.579 

26.583 

26.587 

26.590 

26.594 

26.598 

26.602 

26.606 

26.610 

676 

26.614 

26.618 

26.622 

26.626 

26.630 

26.634 

26.638 

26.642 

26.646 

26.650 

677 

26.653 

26.657 

26.661 

26.665 

26.669 

26.673 

26.677 

26.681 

26.685 

26.689 

678 

26.693 

26.697 

26.701 

26.705 

26.709 

26.713 

26.716 

26.720 

26.724 

26.728 

679 

26.732 

26.736 

26.740 

26.744 

26.748 

26.752 

26.756 

26.760 

26.764 

26.768 

680 

26.772 

26.776 

26.779 

26.783 

26.787 

26.791 

26.795 

26.799 

26.803 

26.807 

68  1 

26.8II 

26.815 

26.819 

26.823 

26.827 

26.831 

26.835 

26.838 

26.842 

26.846 

682 

26.850 

26.854 

26.858 

26.862 

26.866 

26.870 

26.874 

26.878 

26.882 

26.886 

683 

26.890 

26.894 

26.898 

26.902 

26.905 

26.909 

26.913 

26.917 

26.921 

26.925 

684 

26.929 

26.933 

26-937 

26.941 

26.945 

26.949 

26-953 

26.957 

26.961 

26.965 

685 

26.968 

26.972 

26.976 

26.980 

26.984 

26.988 

26.992 

26.996 

27.000 

27.004 

686 

27.008 

27.012 

27.016 

27.020 

27.024 

27.028 

27.031 

27.035 

27.039 

27.043 

687 

27.047 

27-051 

27.055 

27.059 

27.063 

27.067 

27.071 

27.075 

27.079 

27.083 

688 

27.087 

27.090 

27.094 

27.098 

27.102 

27.106 

27.110 

27.114 

27.118 

27.122 

689 

27.126 

27.130 

27.134 

27.138 

27.142 

27.146 

27.150 

27.153 

27.157 

27.161 

690 

27.165 

27.169 

27.173 

27.177 

27.181 

27.185 

27.189 

27.193 

27.197 

27.201 

691 

27.205 

27.209 

27.213 

27.216 

27.220 

27.224 

27.228 

27.232 

27.236 

27.240 

692 

27.244 

27.248 

27.252 

27.256 

27.260 

27.264 

27.268 

27.272 

27.276 

27.279 

693 

27.283 

27.287 

27.291 

27.295 

27.299 

27.303 

27.307 

27.311 

27-3J5 

27.319 

694 

27.323 

27.327 

27.331 

27.335 

27.339 

27.342 

27.346 

27.350 

27.354 

27.358 

695 

27.362 

27.366 

27.370 

27-374 

27.378 

27.382 

27.386 

27.390 

27-394 

27.398 

696 

27.402 

27-405 

27409 

27-413 

.27.417 

27.421 

27.425 

27.429 

27.433 

27.437 

697 

27.441 

27-445 

27.449 

27.453 

27-457 

27.461 

27.465 

27.468 

27472 

27.4/6 

698 

27.480 

27.484 

27.488 

27.492 

27.496 

27.500 

27.504 

27.508 

27.512 

27.516 

699 

27.520 

27.524 

27.528 

27-531 

27-535 

27-539 

27-543 

27-547 

27.551 

27-555 

700 

27-559 

27-563 

27.567 

27.571 

27-575 

27-579 

27.583 

27.587 

27.590 

27.594 

SMITHSONIAN  TABLES. 


193 


TABLE    65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

700 

27-559 

27-563 

27.567 

27-571 

27-575 

27-579 

27.583 

27.587 

27.590 

27-594 

701 

27.598 

27.602 

27.606 

27.610 

27.614 

27.618 

27.622 

27.626 

27-630 

27-634 

702 

27.638 

27.642 

27.646 

27.650 

2/.653 

27.657 

27.661 

27.665 

27.669 

27.673 

703 

27.677 

27.681 

27-685 

27.689 

27-693 

27.697 

27.701 

27.705 

27.709 

27.713 

704 

27.716 

27.720 

27.724 

27.728 

27.732 

27.736 

27.740 

27-744 

27.748 

27.752 

705 

27.756 

27.760 

27.764 

27.768 

27.772 

27.776 

2/.779 

27.783 

27.787 

27.791 

706 

27-795 

27-799 

27-803 

27.807 

27.811 

27.815 

27.819 

27.823 

27.827 

27.831 

707 

27.835 

27.839 

27.842 

27.846 

27.850 

27.854 

27.858 

27.862 

27.866 

27.870 

708 

27.874 

27.878 

27.882 

27.886 

27.890 

27.894 

27.898 

27.902 

27.905 

27.909 

709 

27.913 

27.917 

27.921 

27.925 

27.929 

27-933 

27.937 

27.941 

27-945 

27-949 

710 

27-953 

27-957 

27.961 

27.965 

27.968 

27.972 

27.976 

27.980 

27.984 

27.988 

711 

27.992 

27.996 

28.000 

28.004 

28.008 

28.012 

28.016 

28.020 

28.024 

28.028 

712 

28.031 

28.035 

28.039 

28.043 

28.047 

28.051 

28.055 

28.059 

28.063 

28.067 

713 

28.071 

28.075 

28.079 

28.083 

28.087 

28.090 

28.094 

28.098 

28.IO2 

28.106 

714 

28.IIO 

28.114 

28.118 

28.122 

28.126 

28.130 

28.134 

28.138 

28.142 

28.146 

715 

28.150 

28.153 

28.157 

28.l6l 

28.165 

28.169 

28.173 

28.177 

28.181 

2S.!85 

716 

28.189 

28.193 

28.197 

28.2OI 

28.205 

28.209 

28.213 

28.216 

28.220 

28.224 

717 

28.228 

28.232 

28.236 

28.  240 

28.244 

28.248 

28.252 

28.256 

28.260 

28.264 

718 

28.268 

28.272 

28.276 

28.279 

28.283 

28.287 

28.291 

28.295 

28.299 

28.303 

719 

28.307 

28.311 

28.315 

28.319 

28.323 

28.327 

28.331 

28.335 

28.339 

28.342 

720 

28.346 

28.350 

28.354 

28.358 

28.362 

28.366 

28.370 

28-374 

28.378 

28.382 

721 

28.386 

28.390 

28.394 

28.398 

28.402 

28.405 

28.409 

28.413 

28.417 

28.421 

722 

28.425 

28.429 

28.433 

28.437 

28.441 

28.445 

28.449 

28-453 

28.457 

28.461 

723 

28.465 

28.468 

28.472 

28.476 

28.480 

28.484 

28.488 

28.492 

28.496 

28.500 

724 

28.504 

28.508 

28.512 

28.516 

28.520 

28.524 

28.528 

28.531 

28.535 

28.539 

725 

28.543 

28.547 

28.551 

28.555 

28-559 

28.563 

28.567 

28.571 

28.575 

28.579 

726 

28.583 

28.587 

28.590 

28.594 

28.598 

28.602 

28.606 

28.610 

28.614 

28.6l8 

727 

28.622 

28.626 

28.630 

28.634 

28.638 

28.642 

28.646 

28.650 

28.653 

28.657 

728 

28.661 

28.665 

28.669 

28.673 

28.677 

28.681 

28.685 

28.689 

28.693 

28.697 

729 

28.701 

28.705 

28.709 

28.713 

28.716 

28.720 

28.724 

28.728 

28.732 

28.736 

730 

28.740 

28.744 

28.748 

28.752 

28.756 

28.760 

28.764 

28.768 

28.772 

28.776 

73i 

28.779 

28.783 

28.787 

28.791 

28.795 

28.799 

28.803 

28.807 

28.8II 

28.815 

732 

28.819 

28.823 

28.827 

28.831 

28.835 

28.839 

28.842 

28.846 

28.850 

28.854 

733 

28.858 

28.862 

28.866 

28.870 

28.874 

28.878 

28.882 

28.886 

28.890 

28.894  i 

734 

28.898 

28.902 

28.905 

28.909 

28.913 

28.917 

28.921 

28.925 

28.929 

28.933 

735 

28.937 

28.941 

28.945 

28.949 

28.953 

28.957 

28.961 

28.965 

28.968 

28.972 

736 

28.976 

28.980 

28.984 

28.988 

28.992 

28.996 

29.000 

29.004 

29.008 

29.012 

737 

29.016 

29.020 

29.024 

29.028 

29.031 

29-035 

29.039 

29.043 

29.047 

29.051 

738 

29-055 

29.059 

29.063 

29.067 

29.071 

29.075 

29.079 

29.083 

29.087 

29.090 

739 

29.094 

29.098 

29.102 

29.106 

29.110 

29.114 

29.118 

29.122 

29.126 

29.130 

740 

29-I34 

29.138 

29.142 

29.  146 

29.150 

29.153 

29-J57 

29.161 

29.165 

29.169 

74i 

29.  i  ^3 

29.177 

29.181 

29.185 

29.189 

29.193 

29.197 

29.201 

29-205 

29.209 

742 

29.213 

29.216 

29.220 

29.224 

29.228 

29.232 

29.236 

29.240 

29.244 

29.248 

743 

29-252 

29.256 

29.260 

29.264 

29.268 

29.272 

29.276 

29.279 

29.283 

29.287 

744 

29.291 

29-295 

29.299 

29.303 

29.307 

29.311 

29-3I5 

29.319 

29.323 

29.327 

745 

29-331 

29-335 

29-339 

29.342 

29.346 

29-350 

29-354 

29.358 

29.362 

29.366 

746 

29.370 

29-374 

29.378 

29.382 

29.386 

29-390 

29-394 

29-398 

29.402 

29.405 

747 

29.409 

29.413 

29.417 

29.421 

29-425 

29.429 

29-433 

29-437 

29.441 

29.445 

748 

29-449 

29-453 

29-457 

29.461 

29.465 

29.468 

29.472 

29.476 

29.480 

29.484 

749 

29.488 

29.492 

29.496 

29.500 

29.504 

29.508 

29.512 

29.516 

29.520 

29.524 

750 

29.528 

29-53I 

29-535 

29-539 

29-543 

29-547 

29-55I 

29-555 

29-559 

29.563 

SMITHSONIAN  TABLES. 


194 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

750 

29.528 

29.53I 

29-535 

29-539 

29-543 

29-547 

29.551 

29-555 

29-559 

29-563 

75i 

29.567 

29.571 

29-575 

29-579 

29.583 

29.587 

29.590 

29-594 

29.598 

29.602 

752 

29.606 

29.610 

29.614 

29.618 

29.622 

29.626 

29.630 

29.634 

29.638 

29.642 

753 

29.646 

29-650 

29-653 

29.657 

29.661 

29.665 

29.669 

29.673 

29.677 

29.681 

754 

29.685 

29.689 

29.693 

29.697 

29.701 

29.705 

29.709 

29.713 

29.716 

29.  720 

755 

29.724 

29.728 

29.732 

29.736 

29.740 

29.744 

29-748 

29.752 

29.756 

29.760 

756 

29.764 

29.768 

29.772 

29.776 

29-779 

29.783 

29.787 

29.791 

29.795 

29.799 

757 

29.803 

29.807 

29.811 

29-815 

29.819 

29.823 

29.827 

29.831 

29.835 

29.839 

758 

29.842 

29.846 

29.850 

29.854 

29.858 

29.862 

29.866 

29.870 

29.874 

29.878 

759 

29.882 

29.886 

29.890 

29.894 

29.898 

29.902 

29.905 

29.909 

29.913 

29.917 

760 

29.921 

29.925 

29.929 

29-933 

29.937 

29.941 

29-945 

29.949 

29-953 

29-957 

761 

29.961 

29.965 

29.968 

29.972 

29.976 

29.980 

29.984 

29.988 

29.992 

29.996 

762 

30.000 

30.004 

30.008 

30.012 

30.016 

30.020 

30.024 

30.027 

30.031 

30.035 

•763 

30.039 

30.043 

30.047 

30.051 

30.055 

30.059 

30.063 

30.067 

30.071 

30.075 

764 

30.079 

30.083 

30.087 

30.090 

30.094 

30.098 

30.102 

30.  106 

30.  1  10 

30.H4 

765 

30.118 

30.122 

30.126 

30.130 

30.134 

30.138 

30.142 

30.  146 

30.  150 

30.153 

766 

30.157 

30.161 

30.165 

30.169 

30.173 

30.177 

30.181 

30.  185 

30.189 

30.193 

767 

30.197 

30.201 

30.205 

30.209 

30.213 

30.216 

30.220 

30.224 

30.228 

30.232 

768 

30.236 

30.240 

30.244 

30.248 

30.252 

30.256 

30.  260 

30.264 

30.268 

30.272 

769 

30.276 

30.279 

30.283 

30.287 

30.291 

30.295 

30.299 

30.303 

30.307 

30.3U 

770 

30.315 

30.3I9 

30.323 

30.327 

30.331 

30.335 

30.339 

30.342 

30.346 

30.350 

771 

30.354 

30.358 

30.362 

30.366 

30.370 

30.374 

30.378 

30.382 

30.386 

30.390 

772 

30.394 

30.398 

30.402 

30.405 

30.409 

30.413 

30.417 

30.421 

30.425 

30.429 

773 

30.433 

30.437 

30.441 

30.445 

30.449 

30.453 

30.457 

30.461 

30.465 

30.468 

774 

30.472 

30.476 

30.480 

30.484 

30.488 

30.492 

30.496 

30.500 

30.504 

30.508 

775 

30.512 

30.516 

30.520 

30.524 

30.528 

30-53I 

30.535 

30.539 

30.543 

30.547 

7/6 

30.551 

30.555 

30.559 

30.563 

30.567 

30.571 

30.575 

30.579 

30.583 

30.587 

111 

30.590 

30.594 

30.598 

30.602 

30.606 

30.610 

30.614 

30.618 

30.622 

30.626 

778 

30.630 

30.634 

30.638 

30.642 

30.646 

30.650 

30.653 

30.657 

30.661 

30.665 

779 

30.669 

30.673 

30.677 

30.681 

30.685 

30.689 

30.693 

30.697 

30.701 

30.705 

780 

30.709 

30.7I3 

30.716 

30.720 

30.724 

30.728 

30.732 

30.736 

30.740 

30.744 

781 

30.748 

30.752 

30.756 

30.760 

30.764 

30.768 

30.772 

30.776 

30.779 

30.783 

782 

30.787 

30.791 

30.795 

30.799 

30.803 

30.807 

30.811 

30.815 

30.819 

30.823 

783 

30.827 

30.831 

30-835 

30.839 

30.842 

30.846 

30.850 

30.854 

30-858 

30.862 

784 

30.866 

30.870 

30.874 

30.878 

30.882 

30.886 

30.890 

30.894 

30.898 

30.902 

785 

30.905 

30.909 

30.913 

30.917 

30.921 

30.925 

30.929 

30.933 

30.937 

30.941 

786 

30.945 

30.949 

30.953 

30.957 

30.961 

30.965 

30.968 

30.972 

30.976 

30.980 

787 

30.984 

30.988 

30.992 

30.996 

31.000 

31.004 

31.008 

31.012 

31.016 

31.020 

788 

31.024 

31.027 

3L03I 

3L035 

3L039 

3L043 

3L047 

31.051 

3L055 

3L059 

789 

31.063 

31.067 

3L07I 

3L075 

31.079 

31-083 

3L087 

31.090 

3!-°94 

3L098 

790 

31.102 

31.106 

31.110 

31.114 

31.118 

31.122 

31.126 

31.130 

31.134 

3LI38 

79i 

31.142 

31.146 

31.150 

3LI53 

3LI57 

31.161 

31-165 

31.169 

3I-I73 

3LI77 

792 

3I.l8l 

3I.I85 

31.189 

3LI93 

3LI97 

31.201 

3L205 

31-213 

31.216 

793 

31.220 

3L224 

31.228 

31.232 

31.236 

31.240 

31.244 

31.248 

31.252 

31.256 

794 

31.260 

31.264 

31.268 

31.272 

31.276 

31.279 

3L283 

31.287 

31.291 

3L295 

795 

31.299 

3L303 

3L307 

31.311 

3L3I5 

3L3I9 

3L323 

3L327 

3L33I 

SMSS 

796 

31-339 

3L342 

3L346 

3L350 

3^354 

3I-358 

31.362 

31.366 

31.370 

31.374 

797 

31.378 

3L382 

3L386 

31.390 

31-394 

3L398 

31.402 

31.405 

31.409 

31.413 

798 

3I-4I7 

31.421 

3L425 

3L429 

3L433 

31-437 

3L44I 

3L445 

3M49 

31.453 

799 

31-457 

3I.46I 

3L465 

3L468 

31.472 

3L476 

31.480 

31.484 

31.488 

3L492 

800 

3L496 

3L500 

3L504 

3L508 

3L5I2 

3L5i6 

3L520 

3L524 

3L527 

3L53I 

SMITHSONIAN  TABLES. 


195 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.. 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

800 

3M96 

3L500 

3L504 

3L508 

3I-5I2 

3L5I6 

3L520 

3L524 

3L527 

31.531  1 

801 

3L535 

3L539 

3L543 

31-547 

3L55I 

3L555 

3L559 

3L563 

3L567 

3L57I  1 

802 

31-575 

31.579 

3L583 

3L587 

3J-590 

3L594 

3L598 

31.602 

31.606 

31.610  j 

803 

31.614 

31.618 

31.622 

31.626 

31-630 

31-634 

31.638 

31.642 

31.646 

3I.650 

804 

31.653 

3L657 

31.661 

3L665 

31.669 

31-673 

31.677 

31.681 

3L685 

31.689 

805 

3L693 

31.697 

31.701 

31.705 

31.709 

3L7I3 

31.716 

31.720 

31.724 

31.728 

806 

3L732 

3L736 

3L740 

3L744 

3L748 

3L752 

3L756 

31.760 

31.764 

3L768 

807 

31.772 

31.776 

31-779 

31.783 

3L787 

3L79I 

31.795 

3L799 

31.803 

31.807 

808 

31.811 

31.815 

31.819 

31-823 

31.827 

31.831 

3L835 

31.839 

31.842 

31.846 

809 

31.850 

31.854 

31.858 

31.862 

31.866 

31.870 

3L874 

31.878 

31.882 

31.886 

810 

31.890 

3L894 

31.898 

31.902 

3L905 

31.909 

3L9I3 

3I-9J7 

31.921 

3L925 

811 

31.929 

3L933 

3L937 

3L94I 

3L945 

3L949 

3L953 

31-957 

31.961 

3L965 

812 

31.968 

31.972 

3L976 

31.980 

31.984 

31.988 

31.992 

31.996 

32.OOO 

32.004 

813 

32.008 

32.012 

32.016 

32.020 

32.024 

32.027 

32.031 

32.035 

32.039 

32.043 

814 

32.047 

32.051 

32.055 

32.059 

32.063 

32.067 

32-071 

32.075 

32.079 

32.083 

815 

32.087 

32.090 

32-094 

32.098 

32.102 

32.106 

32.110 

32.114 

32.118 

32.122 

816 

32.126 

32.130 

32.134 

32-138 

32.142 

32.146 

32.150 

32.153 

32.157 

32.l6l 

817 

32.165 

32.169 

32.173 

32.177 

32.181 

32-185 

32.189 

32.193 

32.197 

32.201 

818 

32.205 

32.209 

32.213 

32.216 

32.220 

32.224 

32.228 

32-232 

32.236 

32.240 

819 

32.244 

32.248 

32.252 

32.256 

32.  260 

32.264 

32.268 

32.272 

32.276 

32.279 

820 

32.283 

32.287 

32-291 

32-295 

32-299 

32.303 

32.307 

32.311 

32.315 

32.319 

821 

32.323 

32.327 

32-331 

32-335 

32.339 

32.342 

32.346 

32.350 

32.354 

32.358 

822 

32.362 

32.366 

32.370 

32-374 

32.378 

32-382 

32.386 

32.390 

32.394 

32.398 

823 

32.402 

32.405 

32.409 

32.413 

32.417 

32-421 

32-425 

32.429 

32-433 

32.437  ! 

824 

32.441 

32.445 

32-449 

32.453 

32-457 

32.461 

32.465 

32.468 

32.472 

32.476 

825 

32.480 

32.484 

32.488 

32.492 

32.496 

32.500 

32.504 

32.508 

32.512 

32.516 

826 

32.520 

32.524 

32-527 

32.531 

32-535 

32.539 

32.543 

32.547 

32.551 

32-555 

827 

32.559 

32.563 

32.567 

32.5/1 

32-575 

32.579 

32.583 

32-587 

32.590 

32.594  i 

828 

32.598 

32.602 

32.606 

32.610 

32.614 

32.618 

32.622 

32.626 

32.630 

32.634 

829 

32.638 

32.642 

32.646 

32.650 

32-653 

32.657 

32.661 

32-665 

32.669 

32.673 

830 

32.677 

32.681 

32-685 

32.689 

32.693 

32.697 

32.701 

32-705 

32.709 

32.713 

831 

32.716 

32.720 

32.724 

32.728 

32-732 

32.736 

32.740 

32.744 

32.748 

32.752  ] 

832 

32.756 

32.760 

32.764 

32.768 

32.772 

32.776 

32.779 

32-783 

32.787 

32.791 

833 

32.795 

32.799 

32.803 

32.807 

32.811 

32-815 

32-819 

32.823 

32.827 

32.831 

834 

32.835 

32.839 

32.842 

32.846 

32.850 

32-854 

32.858 

32.862 

32.866 

32.870 

835 

32.874 

32.878 

32.882 

32.886 

32.890 

32.894 

32.898 

32.902 

32.905 

32.909 

836 

32.9*3 

32.917 

32.921 

32.925 

32.929 

32-933 

32.937 

32.941 

32.945 

32.949 

837 

32-953 

32.957 

32-961 

32-965 

32.968 

32.972 

32.976 

32.980 

32.984 

32.988  i 

838 

32.992 

32.996 

33-000 

33.004 

33-008 

33-012 

33.016 

33.020 

33-024 

33-027  [ 

839 

33-031 

33.035 

33.039 

33.043 

33-047 

33-051 

33.055 

33.059 

33.063 

33.067  1 

840 

33-071 

33-075 

33.079 

33-083 

33-o87 

33.090 

33-094 

33.098 

33.102 

33.106  j 

841 

33-110 

33-114 

33-118 

33.122 

33.126 

33.130 

33.134 

33.138 

33.142 

33.146 

842 

33-150 

33-153 

33.157 

33.i6t 

33-!65 

33.169 

33-173 

33-177 

33.181 

33.185 

843 

33-189 

33-193 

33.I97 

33.201 

33-205 

33.209 

33.213 

33.2i6 

33.220 

33-224 

844 

33.228 

33.232 

33-236 

33.240 

33.244 

33.248 

33.252 

33.256 

33.260 

33.264 

845 

33.268 

33.272 

33.276 

33-279 

33-283 

33.287 

33-291 

33.295 

33.299 

33.303 

846 

33.307 

33-311 

33.315 

33.319 

33.323 

33-327 

33.331 

33-335 

33-339 

33-342 

847 

33.346 

33-350 

33-354 

33.358 

33-362 

33.366 

33-370 

33-374 

33-378 

33-382  ; 

848 

33.386 

33-390 

33-394 

33-398 

33.402 

33.405 

33.409 

33.413 

33417 

33.421 

849 

33.425 

33.429 

33-433 

33-437 

33-441 

33.445 

33.449 

33-453 

33-457 

33.461 

850 

33464 

33.468 

33.472 

33.476 

33-480 

33.484 

33.488 

33.492 

33.496 

33.500 

SMITHSONIAN  TABLES. 


TQ6 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

850 

33-464 

33.468 

33.472 

33.476 

33.480 

33.484 

33.488 

33492 

33.496 

33.500 

851 

33-504 

33.508 

33-512 

33.516 

33-520 

33-524 

33.527 

33.531 

33-535 

33-539 

852 

33-543 

33-547 

33-551 

33.555 

33-559 

33-563 

33-567 

33-571 

33-575 

33-579 

853 

33-583 

33.587 

33-590 

33-594 

33.598 

33.602 

33.606 

33-610 

33-614 

33.6i8 

854 

33.622 

33.626 

33.630 

33.634 

33-638 

33.642 

33.646 

33.650 

33.653 

33.657 

855 

33-661 

33.665 

33.669 

33.673 

33.677 

33.681 

33.685 

33.689 

33.693 

33.697 

856 

33-701 

33.705 

33.709 

33.713 

33.7i6 

33.720 

33.724 

33.728 

33.732 

33.736 

857 

33-740 

33-744 

33-748 

33.752 

33.756 

33.760 

33.764 

33.768 

33-772 

33.776 

858 

33-779 

33.783 

33.787 

33-791 

33-795 

33-799 

33.803 

33.807 

33-811 

33.815 

859 

33-819 

33.823 

33.827 

33.831 

33-835 

33.839 

33.842 

33.846 

33.850 

33.854 

860 

33.858 

33.862 

33.866 

33.870 

33.874 

33.878 

33.882 

33-886 

33-890 

33.894 

861 

33-898 

33-902 

33.905 

33.909 

33.913 

33.9I7 

33.921 

33-925 

33-929 

33-933 

862 

33-937 

33.941 

33-945 

33-949 

33-953 

33-957 

33.961 

33.964 

33.968 

33-972 

863 

33-976 

33.98o 

33-984 

33-988 

33.992 

33.996 

34.000 

34.004 

34.008 

34.012 

864 

34.016 

34.020 

34.024 

34-027 

34.031 

34.035 

34-039 

34.043 

34-047 

34.051 

865 

34.055 

34-059 

34.063 

34.067 

34.071 

34.075 

34.079 

34.083 

34-087 

34.090 

866 

34.094 

34.098 

34.102 

34-  106 

34.110 

34-114 

34.118 

34.122 

34.126 

34.130 

867 

34-134 

34.138 

34.142 

34.146 

34.150 

34.153 

34.157 

34.161 

34.165 

34.169 

868 

34-173 

34.177 

34.181 

34.185 

34-189 

34.193 

34-197 

34.201 

34-205 

34.209 

869 

34-213 

34.2i6 

34-220 

34.224 

34-228 

34.232 

34.236 

34.240 

34-244 

34.248 

870 

34.252 

34.256 

34.260 

34-264 

34.268 

34.272 

34.276 

34-279 

34.283 

34-287 

871 

34.291 

34.295 

34.299 

34.303 

34.307 

34.3" 

34.315 

34.3I9 

34.323 

34.327 

872 

34.331 

34.335 

34.339 

34.342 

34.346 

34-350 

34-354 

34.358 

34.362 

34.366 

873 

34.370 

34-374 

34.378 

34.382 

34.386 

34.390 

34-394 

34.398 

34.402 

34.405 

874 

34.409 

34.413 

34.417 

34.421 

34.425 

34.429 

34-433 

34437 

34-441 

34-445 

875 

34.449 

34-453 

34.457 

34.461 

34464 

24.468 

34.472 

34.476 

34.480 

34.484 

876 

34-488 

34.492 

34.496 

34-500 

34.504 

34.508 

34-512 

34.516 

34-520 

34.524 

877 

34.527 

34-531 

34-535 

34-539 

34-543 

34-547 

34-551 

34-555 

34-559 

34-563 

878 

34.567 

34-571 

34-575 

34-579 

34.583 

34.587 

34.590 

34-594 

34.598 

34.602 

879 

34.606 

34-6io 

34.614 

34.618 

34.622 

34.626 

34.630 

34-634 

34.638 

34-642 

880 

34.646 

34.650 

34.653 

34.657 

34.66i 

34.665 

34.669 

34.673 

34.677 

34.68i 

881 

34-685 

34.689 

34.693 

34.697 

34-701 

34.705 

34.709 

34.713 

34.716 

34.720 

882 

34-724 

34.728 

34.732 

34-736 

34.740 

34.744 

34.748 

34.752 

34.756 

34.760 

883 

34-764 

34.768 

34-772 

34.776 

34-779 

34.783 

34.787 

34.791 

34.795 

34.799 

884 

34-803 

34.807 

34.811 

34.8i5 

34-819 

34.823 

34.827 

34.831 

34.835 

34.839 

885 

34.842 

34-846 

34.850 

34.854 

34.858 

34.862 

34.866 

34.870 

34.874 

34.878 

886 

34.882 

34.886 

34-890 

34.894 

34.898 

34.902 

34.905 

34-909 

34.913 

34.917 

887 

34.921 

34.925 

34.929 

34-933 

34-937 

34.941 

34.945 

34-949 

34-953 

34.957 

888 

34.96i 

34-964 

34.968 

34.972 

34.976 

34.980 

34.984 

34.988 

34.992 

34.996 

889 

35-000 

35-004 

35.oo8 

35-012 

35-016 

35-020 

35.024 

35-027 

35.031 

35.035 

890 

35.039 

35-043 

35-047 

35-051 

35-055 

35.059 

35.063 

35.o67 

35-071 

35.075 

891 

35.079 

35-083 

35.087 

35.090 

35.094 

35-098 

35.102 

35.io6 

35-110 

35-114 

892 

35-118 

35-122 

35.^26 

35.130 

35.134 

35.138 

35.142 

35.I46 

35.150 

35-153 

893 

35.157 

35.i6i 

35.165 

35-169 

35.173 

35.177 

35.18! 

35.185 

35.189 

35.193 

894 

35.197 

35.201 

35-205 

35-209 

35-213 

35.2i6 

35-220 

35.224 

35.228 

35.232 

895 

35-236 

35.240 

35.244 

35.248 

35.252 

35.256 

35.260 

35.264 

35.268 

35.272 

896 

35.276 

35.279 

35.283 

35.287 

35-291 

35.295 

35.299 

35-303 

35.307 

35-3II 

897 

35.3I5 

35.319 

35.323 

35.327 

35-331 

35-335 

35-339 

35-342 

35.346 

35-350 

898 

35-354 

35.358 

35.362 

35.366 

35-370 

35-374 

35-378 

35.382 

35.386 

35.390 

899 

35.394 

35.398 

35-402 

35.405 

35-409 

35.413 

35.417 

35.421 

35.425 

35-429 

900 

35.433 

35-437 

35.441 

35-445 

35-449 

35-453 

35-457 

35.461 

35.464 

35468 

SMITHSONIAN  TABLES. 


197 


TABLE   65. 


MILLIMETRES      NTO    INCHES. 

i  mm.  =  0.03  93?  inch* 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

900 

35-433 

35-437 

35-441 

35445 

35-449 

35-453 

35-457 

35.46I 

35.464 

35.468 

901 

35.472 

35.476 

35-480 

35.484 

35-488 

35.492 

35.496 

35.500 

35.504 

35.508 

902 

35-512 

35-5I6 

35-520 

35-524 

35.527 

35-531 

35-535 

35.539 

35-543 

35-547 

9°3 

35-551 

35-555 

35.559 

35.563 

35.567 

35-571 

35-575 

35-579 

35.583 

35.587 

904 

35-59° 

35-594 

35.598 

35.602 

35.606 

35.610 

35.614 

35-618 

35.622 

35-626 

905 

35.630 

35.634 

35.638 

35.642 

35.646 

35.650 

35.653 

35.657 

35.66i 

35.665 

906 

35.669 

35.673 

35.677 

35.681 

35.685 

35.689 

35.693 

35.697 

35.701 

35.705 

907 

35.709 

35.713 

35.716 

35-720 

35.724 

35.728 

35-732 

35.736 

35-740 

35-744 

908 

35-748 

35-752 

35.756 

35.760 

35.764 

35-768 

35-772 

35.776 

35-779 

35.783 

909 

35.787 

35.791 

35.795 

35-799 

35.803 

35.807 

35-811 

35.815 

35-8i9 

35-823 

910 

35.827 

35.831 

35.835 

35.839 

35.842 

35.846 

35-850 

35-854 

35-858 

35.862 

911 

35-866 

35-870 

35.874 

35.878 

35.882 

35-886 

35-890 

35.894 

35-898 

35-902 

912 

35.905 

35.909 

35.913 

35.917 

35.921 

35.925 

35.929 

35-933 

35-937 

35.941 

9J3 

35-945 

35-949 

35-953 

35-957 

35.961 

35-964 

35.968 

35-972 

35.976 

35.98o 

914 

35.984 

35.988 

35.992 

35.996 

36.000 

36.004 

36.008 

36.012 

36.016 

36.020 

915 

36.024 

36.027 

36.031 

36.035 

36.039 

36.043 

36.047 

36.051 

36-055 

36.059 

916 

36.063 

36.067 

36.071 

36.075 

36.079 

36.083 

36.087 

36.090 

36.094 

36.098 

917 

36.  102 

36.  106 

36.110 

36.114 

36.118 

36.122 

36.126 

36.130 

36.134 

36.138 

918 

36.142 

36.  146 

36.150 

36.153 

36.157 

36.161 

36.165 

36-169 

36.173 

36.177 

919 

36.I8I 

36.185 

36.189 

36.193 

36.197 

36.201 

36.205 

36.209 

36.213 

36.216 

920 

36.220 

36-224 

36.228 

36.232 

36.236 

36.240 

36.244 

36.248 

36.252 

36.256 

921 

36.260 

36.264 

36.268 

36.272 

36.276 

36.279 

36-283 

36.287 

36.291 

36.295 

922 

36.299 

36-303 

36.307 

36.3H 

36.315 

36.319 

36-323 

36.327 

36.331 

36.335 

923 

36.339 

36.342 

36.346 

36.350 

36.354 

36.358 

36.362 

36.366 

36.3/0 

36.374 

924 

36.378 

36.382 

36.386 

36.390 

36.394 

36.398 

36.402 

36.405 

36.409 

36.413 

925 

36.417 

36.421 

36.425 

36.429 

36.433 

36.437 

36.441 

36.445 

36.449 

36.453 

926 

36.457 

36.461 

36.464 

36.468 

36.472 

36.476 

36.480 

36.484 

36.488 

36-492 

927 

36.496 

36.500 

36.504 

36.508 

36.512 

36.516 

36.520 

36.524 

36.527 

36.531 

928 

36.535 

36.539 

36.543 

36.547 

36.551 

36.555 

36.559 

36.563 

36.567 

36.571 

929 

36.575 

36.579 

36.583 

36.587 

36.590 

36.594 

36.598 

36.602 

36.606 

36.610 

930 

36.614 

36.618 

36.622 

36.626 

36.630 

36-634 

36.638 

36.642 

36.646 

36.650 

931 

36.653 

36-657 

36.661 

36-665 

36.669 

36.673 

36.677 

36.681 

36.685 

36.689 

932 

36.693 

36.697 

36.701 

36.705 

36.709 

36.713 

36.716 

36.720 

36.724 

36.728 

933 

36.732 

36.736 

36.740 

36.744 

36.748 

36.752 

36.756 

36.760 

36.764 

36.768 

934 

36.772 

36.776 

36.779 

36.783 

36.787 

36.791 

36.795 

36.799 

36.803 

36.807 

935 

36.8II 

36.815 

36.819 

36.823 

36.827 

36.831 

36-835 

36.839 

36.842 

36.846 

936 

36.850 

36.854 

36.858 

36.862 

36.866 

36.870 

36.874 

36-878 

36.882 

36.886 

937 

36.890 

36.894 

36.898 

36.902 

36.905 

36.909 

36.913 

36.917 

36.921 

36-925 

933 

36.929 

36.933 

36.937 

36.941 

36.945 

36.949 

36.953 

36.957 

36.961 

36-964 

939 

36.968 

36.972 

36.976 

36.980 

36.984 

36.988 

36.992 

36.996 

37.000 

37.004 

940 

37.008 

37.012 

37.016 

37.020 

37.024 

37.027 

37.031 

37.035 

37.039 

37-043 

941 

37.047 

37-051 

37.055 

37.059 

37.063 

37.067 

37.071 

37.075 

37.079 

37.083 

942 

37.087 

37.090 

37.094 

37.098 

37.102 

37.106 

37.110 

37.H4 

37.118 

37.122 

943 

37.126 

37.T30 

37.134 

37.138 

37.142 

37.146 

37.150 

37.153 

37-157 

37.161 

944 

37.165 

37.169 

37.173 

37.177 

37.181 

37.185 

37.189 

37.193 

37.197 

37.201 

945 

37.204 

37-208 

37.212 

37.216 

37.220 

37.224 

37-228 

37.232 

37-236 

37-240 

946 

37.244 

37.248 

37.252 

37.256 

37.260 

37.264 

37.268 

37.272 

37.276 

37.279 

947 

37.283 

37.287 

37.291 

37.295 

37.299 

37.303 

37.307 

37.3H 

37-3!5 

37.319 

948 

37.323 

37.327 

37.331 

37-335 

37.339 

37.342 

37.346 

37.350 

37-354 

37.358 

949 

37.362 

37.366 

37.370 

37-374 

37.378 

37.382 

37-386 

37-39° 

37.394 

37.398 

950 

37.402 

37405 

37.409 

37.413 

37.417 

37-421 

37.425 

37.429 

37-433 

37437 

SMITHSONIAN  TABLES. 


198 


TABLE   65. 


MILLIMETRES    INTO    INCHES. 

i  mm.  =  0.03937  inch. 


Milli- 
metres. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

I 
.7 

.8 

.9 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

Inches. 

950 

37.402 

37-405 

37.409 

37.413 

37.4I7 

37.421 

37.425 

37.429 

37-433 

37.437 

95  1 

37-441 

37-445 

37-449 

37.453 

37-457 

37.46I 

37.464 

37.468 

37-472 

37.476 

952 

37.480 

37.484 

37-488 

37.492 

37.496 

37.500 

37.504 

37.508 

37.512 

37.516 

953 

37-520 

37.524 

37.527 

37-531 

37-535 

37-539 

37.543 

37.547 

37-551 

37-555 

954 

37-559 

37.563 

37.567 

37-571 

37-575 

37-579 

37.583 

37.587 

37-590 

37-594 

955 

37.598 

37.602 

37.6o6 

37-610 

37.6i4 

37-6i8 

37.622 

37.626 

37.630 

37.634 

956 

37.638 

37.642 

37.646 

37.650 

37.653 

37.657 

37-661 

37.665 

37-669 

37.673 

957 

37.677 

37-681 

37-685 

37.689 

37.693 

37.697 

37-701 

37.705 

37.709 

37.713 

958 

37.716 

37.720 

37.724 

37.728 

37-732 

37.736 

37.740 

37-744 

37.748 

37.752 

959 

37.756 

37.760 

37.764 

37.768 

37.772 

37-776 

37-779 

37.783 

37.787 

37-791 

960 

37-795 

37.799 

37-803 

37.807 

37.811 

37.8i5 

37.819 

37.823 

37.827 

37-831 

961 

37.835 

37.839 

37-842 

37.846 

37-850 

37.854 

37.858 

37.862 

37-866 

37.870 

962 

37.874 

37.878 

37.882 

37-886 

37.890 

37.894 

37-898 

37.901 

37.905 

37.909 

963 

37.913 

37.917 

37.921 

37-925 

37.929 

37-933 

37-937 

37-941 

37-945 

37.949 

964 

37-953 

37-957 

37.96i 

37-964 

37.968 

37-972 

37-S76 

37.980 

37.984 

37.988 

965 

37.992 

37.996 

38.000 

38.004 

38.008 

38.012 

38.016 

38.020 

38.024 

38-027 

966 

38.031 

38.035 

38-039 

38.043 

38.047 

38.051 

38-055 

38.059 

38.063 

38.067 

967 

38.071 

38.075 

38.079 

38-083 

38.087 

38.090 

38.094 

38.098 

38.102 

38.106 

968 

38.110 

38.114 

38.118 

38.122 

38.126 

38.130 

38.134 

38.138 

38.142 

38.146 

969 

38.150 

38.153 

38.157 

38.161 

38.165 

38.169 

38.173 

38.177 

38.181 

38.185 

970 

38.189 

38.193 

38.197 

38.201 

38-205 

38.209 

38.213 

38.216 

38.220 

38.224 

971 

38.228 

38.232 

38-236 

38.240 

38-244 

38.248 

38.252 

38.256 

38.260 

38.264 

972 

38.268 

38-272 

38.276 

38.279 

38.283 

38.287 

38.291 

38.295 

38-299 

38.303 

973 

38-307 

38.3H 

38.315 

38-319 

38-323 

38.327 

38.331 

38.335 

38.339 

38.342 

974 

38.346 

38.350 

38.354 

38.358 

38.362 

38.366 

38.370 

38.374 

38.378 

38.382 

975 

38.386 

38-390 

38.394 

38.398 

38.401 

38-405 

38.409 

38.413 

38.417 

38.421 

976 

38.425 

38.429 

38.433 

38.437 

38.441 

38.445 

38.449 

38.453 

38.457 

38.461 

977 

38-464 

38.468 

38.472 

38.476 

38.480 

38.484 

38.488 

38.492 

38.496 

38.500 

978 

38.504 

38-508 

38.512 

38-516 

38.520 

38.524 

38.527 

38.531 

38.535 

38.539 

979 

38.543 

38.547 

38.551 

38.555 

38.559 

38-563 

38.567 

38.571 

38.575 

38.579 

980 

38.583 

38.587 

38-59° 

38.594 

38.598 

38.602 

38.606 

38.610 

38.614 

38.618 

981 

38.622 

38.626 

38.630 

38.634 

38.638 

38.642 

38.646 

38-650 

38.653 

38.657 

982 

38.661 

38-665 

38-669 

38-673 

38.677 

38.681 

38.685 

38.689 

38.693 

38.697 

983 

38.701 

38.705 

38.709 

38.713 

38.716 

38-720 

38.724 

38.728 

38.732 

38.736 

984 

38.740 

38.744 

38.748 

38.752 

38.756 

38.760 

38.764 

38.768 

38.772 

38.776 

985 

38.780 

38.783 

38.787 

38.791 

38.795 

38.799 

38.803 

38.807 

38.811 

38.815 

986 

38.819 

38.823 

38.827 

38.831 

38.835 

38-839 

38.842 

38.846 

38.850 

38.854 

987 

38.858 

38.862 

38.866 

38.870 

38.874 

38.878 

38.882 

38.886 

38.890 

38.894 

988 

38-898 

38.901 

38.905 

38.909 

38-913 

38.917 

38.921 

38.925 

38.929 

38.933 

989 

38.937 

38-941 

38.945 

38.949 

38.953 

38.957 

38-961 

38.964 

38.968 

38.972 

990 

38.976 

38.980 

38.984 

38.988 

38.992 

38.996 

39.000 

39.004 

39.008 

39.012 

991 

39.016 

39.020 

39.024 

39.027 

39-031 

39-035 

39-039 

39-043 

39.047 

39-051 

992 

39-055 

39-059 

39-o63 

39.067 

39.071 

39.075 

39-079 

39-083 

39.087 

39.090 

993 

39-094 

39.098 

39.102 

39.106 

39.110 

39-IJ4 

39.118 

39.122 

39.126 

39-T30 

994 

39-134 

39.138 

39.142 

39.146 

39.I50 

39-153 

39.157 

39.161 

39-1  65 

39.169 

995 

39.173 

39-177 

39.181 

39-I85 

39.189 

39-  J93 

39.197 

39.201 

39-205 

39.209 

996 

39-213 

39.216 

39.220 

39-224 

39.228 

39-232 

39.236 

39.240 

39-244 

39.248 

997 

39.252 

39.256 

39.260 

39.264 

39-268 

39-272 

39-276 

39.279 

39-283 

39-287 

998 

39.291 

39.295 

39-299 

39-303 

39.307 

39-3ii 

39.315 

39-3I9 

39-323 

39.327 

999 

39-  33* 

39-335 

39-339 

39-342 

39-346 

39-350 

39-354 

39-358 

39.362 

39.366 

1000 

39-370 

39-374 

39.378 

39-382 

39.386 

39-390 

39-394 

39.398 

39.401 

39405 

SMITHSONIAN  TABLES. 


199 


TABLE    66. 


FEET    INTO    METRES. 

i  foot  =  0.3048006  metre. 


Feet. 

0 

. 

2 

3 

4 

5 

6 

j 

8 

9 

m. 

m. 

m. 

in. 

m. 

m. 

m. 

m. 

m. 

m. 

0 

0.000 

0.305 

0.610 

0.914 

1.219 

1.524 

1.829 

2.134 

2.438 

2-743 

10 

3.048 

3-353 

3.658 

3.962 

4.267 

4-572 

4.877 

5.182 

5-486 

5-791 

20 

6.096 

6.401 

6.706 

7.OIO 

7'3I5 

7.620 

7.925 

8.230 

8.534 

30 

9.144 

9.449 

9-754 

10.058 

10.363 

10.668 

10.973 

11.278 

11.582 

11.887 

40 

12.192 

12.497 

12.802 

13.106 

13.411 

13.716 

14.021 

14.326 

14.630 

14-935 

50 

15.240 

15-545 

15.850 

16.154 

16.459 

16.764 

17.069 

17.374 

17.678 

17-983 

60 

18.288 

18.593 

18.898 

19.202 

I9-507 

19.812 

20.117 

20.422 

20.726 

21.031 

70 

21.336 

21.641 

21.946 

22.250 

22-555 

22.860 

23-165 

23.470 

23-774 

24.079 

80 

24.384 

24.689 

24.994 

25-298 

25.603 

25.908 

26.213 

26.518 

26.822 

27.127 

90 

27.432 

27.737 

28.042 

28.346 

28.651 

28.956 

29.261 

29.566 

29.870 

30.175 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

100 

30.48 

33-53 

36.58 

39.62 

42.67 

45-72 

48.77 

51.82 

54-86 

57.91 

200 

60.96 

64.01 

67.06 

70.10 

73-15 

76.20 

79.25 

82.30 

85-34 

88.39 

300 

91.44 

94-49 

97-54 

100.58 

103.63 

106.68 

109.73 

112.78 

115.82 

118.87 

400 

121.92 

124.97 

128.02 

131.06 

134.11 

137.16 

140.21 

143.26 

146.30 

149-35 

500 

152.40 

155-45 

158.50 

161.54 

164.59 

167.64 

170.69 

173.74 

176.78 

179-83 

600 

182.88 

185.93 

188.98 

192.02 

195.07 

198.12 

201.17 

204.22 

207.26 

210.31 

700 

213.36 

216.41 

219.46 

222.50 

225.55 

228.60 

231-65 

234.70 

237-74 

240.79 

800 

243.84 

246.89 

249.94 

252.98 

256.03 

259.08 

262.13 

265.18 

268.22 

271.27 

900 

274.32 

277.37 

280.42 

283.46 

286.51 

289.56 

292.61 

295.66 

298.70 

301.75 

1000 

304.80 

307-85 

310.90 

3I3.94 

316.99 

320.04 

323-09 

326.14 

329.18 

332.23 

IIOO 

335-28 

338.33 

34L38 

344.42 

347-47 

350.52 

353-57 

356.62 

359-67 

362.71 

1  200 

365.76 

368.81 

371.86 

374.90 

377.95 

381.00 

384-05 

387.10 

390.14 

393-19 

1300 

396.24 

399-29 

402.34 

405-38 

408.43 

411.48 

414.53 

417.58 

420.62 

423.67 

1400 

426.72 

429.77 

432.82 

435-86 

438.91 

441.96 

445-01 

448.06 

451.10 

454.15 

1500 

457-20 

460.25 

463-30 

466.34 

469-39 

472.44 

475-49 

478.54 

481.58 

484.63 

1600 

487.68 

490-73 

493-78 

496.82 

499-87 

502.92 

505.97 

509.02 

512.07 

5i5-ii 

1700 

518.16 

521.21 

524.26 

527-31 

530.35 

533-40 

536.45 

539-50 

542.55 

545-59 

1800 

548.64 

551.69 

554-74 

557.79 

560.83 

563.88 

566.93 

569.98 

573-03 

576.07 

1900 

579-  *2 

582.17 

585-22 

588.27 

59L3I 

594.36 

597.41 

600.46 

603.51 

606.55 

2000 

609.60 

612.65 

615.70 

618.75 

621.79 

624.84 

627.89 

630.94 

633.99 

637.03 

2100 

640.08 

643-13 

646.18 

649-23 

652.27 

655-32 

658.37 

661.42 

664.47 

667.51 

2200 

670.56 

673.61 

676.66 

679.71 

682.75 

685.80 

688.85 

691.90 

694.95 

697.99 

2300 

701.04 

704.09 

707.14 

710.19 

713-23 

716.28 

719.33 

722.38 

725.43 

728.47 

2400 

73L52 

734-57 

737-62 

740.67 

743.71 

746.76 

749.81 

752.86 

755-91 

758.95 

2500 

762.00 

765.05 

768.10 

77LI5 

774.19 

777.24 

780.  29 

783.34 

786.39 

789-43 

2600 

792.48 

795-53 

798.58 

801.63 

804.67 

807.72 

810.77 

813.82 

816.87 

819.91 

2700 

822.96 

826.01 

829.06 

832.11 

835-15 

838.20 

841.25 

844.30 

847-35 

850.39 

2800 

853.44 

856.49 

859-54 

862.59 

865.63 

868.68 

87L73 

874.78 

877-83 

880.87 

2900 

883.92 

886.97 

890.02 

893.07 

896.11 

899.16 

902.21 

905.26 

908.31 

9H.35 

3000 

914.40 

9I7-45L 

920.50 

923.55 

926.59 

929.64 

932.69 

935-74 

938.79 

941.83 

3100 

944.88 

947-93 

950.98 

954.03 

957-07 

960.12 

963-17 

966.22 

969.27 

972.31 

3200 

975.36 

978.41 

981.46 

984-51 

987.55 

990.60 

993.65 

996.70 

999-75 

1002.79 

3300 

1005.84 

1008.89 

1011.94 

1014.99 

1018.03 

1021.08 

1024.13 

1027.18 

1030.23 

1033.27 

3400 

1036.32 

1039.37 

1042.42 

1045.47 

1048.51 

1051.56 

1054.61 

1057.66 

1060.71 

1063.75 

3500 

1066.80 

1069.85 

1072.90 

1075-95 

1078.99 

1082.04 

1085.09 

1088.14 

1091.19 

1094.23 

3600 

1097.28 

1100.33 

1103.38 

1106.43 

1109.47 

1112.52 

IH5.57 

1118.62 

1121.67 

1124.71 

3700 
3800 

1127.76 
1158.24 

1130.81 
1161.29 

1133.86 
1164.34 

1136.91 
1167.39 

1139-95 
1170.43 

1143.00 
1173.48 

1146.05 
1176.53 

1149.10 
1179.58 

1152.15 
1182.63 

H55.I9 
1185.67 

3900 

1188.72 

1191.77 

1194.82 

1197.87 

1200.91 

1203.96 

1207.01 

1210.06 

1213.11 

1216.15 

4000 

1219.20 

1222.25 

1225.30 

1228.35 

1231.39 

1234.44 

1237.49 

1240.54 

1243-59 

1246.63 

SMITHSONIAN  T/BLES. 


20O 


TABLE   66. 


FEET    INTO    METRES. 

i  foot  =  0.3048006  metre. 


Fe  t. 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

m. 

m. 

m. 

m. 

m. 

m. 

in. 

m. 

m. 

m. 

4000 

1219.2 

1222.3 

1225.3 

1228.3 

1231.4 

1234.4 

1237.5 

1240.5 

1243.6 

1246.6 

4100 

1249.7 

1252.7 

1255-8 

1258.8     1261.9 

1264.9 

1268.0 

I27I.O 

1274.1 

1277.1 

4200 

I28O.2 

1283.2 

1286.3 

1289.3 

1292.4 

1295-4 

1298.5 

I30I.5 

1304.5 

1307.6 

4300 

1310.6 

I3I3-7 

1316.7 

1319.8 

1322.8 

1325.9 

1328.9 

1332.0 

1335.0 

I338.I 

4400 

I34I.I 

1344.2 

1347-2 

1350.3 

1353.3 

1356.4 

1359-4 

1362.5 

1365.5 

1368.6 

4500 

I37I.6 

1374.7 

1377-7 

1380.7 

1383.8 

1386.8 

1389.9 

I392.Q 

1396.0 

1399.0 

4600 

1402.  1 

1405-1 

1408.2 

I4II.2 

I4I4.3 

I4I7.3 

1420.4 

1423.4 

1426.5 

1429.5 

4700 

1432.6 

1435-6 

H38.7 

I44L7 

1444.8 

1447.8 

1450.9 

1453-9 

1456.9 

1460.0 

4800 

1463.0 

1466.1 

1469.1 

1472.2 

1475-2 

1478.3 

1481.3 

1484.4 

1487.4 

1490.5 

4900 

^493-5 

1496.6 

1499.6 

1502.7 

1505.7 

1508.8 

I5H.8 

I5H.9 

I5I7.9 

I52I.O 

5000 

1524.0 

1527.1 

I530.I 

I533.I 

1536.2 

1539.2 

1542.3 

1545.3 

1548.4 

I55L4 

5100 

1554-5 

1557.5 

1560.6 

1563.6 

1566.7 

1569.7 

1572.8 

1575-8 

1578.9 

1581.9 

5200 

1585.0 

1588.0 

I59I.I 

I594-I 

1597-2 

l6oo.2 

1603.3 

1606.3 

1609.3 

1612.4 

53oo 

1615.4 

1618.5 

1621.5 

1624.6 

1627.6 

1630.7 

1633.7 

1636.8 

1639.8 

1642.9 

5400 

1645-9 

1649.0 

1652.0 

1655-1 

1658.1 

1661.2 

1664.2 

1667.3 

1670.3 

16734 

5500 

1676.4 

1679-5 

1682.5 

1685.5 

1688.6 

1691.6 

1694.7 

1697.7 

1700.8 

1703.8 

5600 

1706.9 

1709.9 

I7I3.0 

1716.0 

I7I9.I 

1722.1 

1725.2 

1728.2 

I73L3 

1734.3 

5700 

1737.4 

1740.4 

1743.5 

1746.5 

1749.6 

1752.6 

1755.7 

1758.7 

1761.7 

1764.8 

5800 

1767.8 

1770.9 

1773-9 

1777.0 

1780.0 

1783.1 

I786.I 

1789.2 

1792.2 

1795.3 

5900 

1798.3 

1801.4 

1804.4 

1807.5 

1810.5 

1813.6 

1816.6 

1819.7 

1822.7 

1825.8 

6000 

1828.8 

1831.9 

1834-9 

1837.9 

1841.0 

1844.0 

1847.1 

1850.1 

I853-2 

1856.2 

6100 

1859.3 

1862.3 

1865.4 

1868.4 

I87I.5 

1874.5 

1877.6 

1880.6 

1883.7 

1886.7 

6200 

1889.8 

1892.8 

1895.9 

1898.9 

1902.0 

1905.0 

1908.1 

I9II.I 

1914.1 

1917.2 

6300 

1920.2 

1923.3 

1926.3 

1929.4 

1932.4 

1935.5 

1938.5 

I94I.6 

1944-6 

1947.7 

6400 

1950.7 

1953.8 

1956.8 

1959.9 

1962.9 

1966.0 

1969.0 

I972.I 

I975.I 

1978.2 

6500 

1981.2 

1984.3 

1987.3 

1990.3 

19934 

1996.4 

!999-5 

2002.5 

2005.6 

2008.6 

6600 

20II.7 

2014.7 

2017.8 

2020.8 

2023.9 

2026.9 

2030.0 

2033.0 

2036.  1 

2039.1 

6700 

2042.2 

2045.2 

2048.3 

2051.3 

2054.4 

2057.4 

2060.5 

2063.5 

2066.5 

2069.6 

6800 

2072.6 

2075.7 

2078.7 

2081.8 

2084.8 

2087.9 

2090.9 

2094.0 

2097.0 

2  100.  1 

6900 

2I03.I 

2IO6.  2 

2109.2 

2II2.3 

2H5.3 

2118.4 

2121.4 

2124.5 

2127.5 

2130.6 

7000 

2133.6 

2136.7 

2139.7 

2142.7 

2145.8 

2148.8 

2151.9 

2154.9 

2158.0 

2161.0 

7100 

2164.1 

2I67.I 

2170.2 

2173.2 

2176.3 

2179.3 

2182.4 

2185.4 

2188.5 

2I9I.5 

7200 

2194.6 

2197.6 

22OO.7 

2203.7 

2206.8 

2209.8 

2212.9 

2215.9 

2218.9 

2222.0 

7300 

2225.0 

2228.1 

2231.1 

2234.2 

2237.2 

2240.3 

2243.3 

2246.4 

2249.4 

2252.5 

7400 

2255.5 

2258.6 

2261.6 

2264.7 

2267.7 

2270.8 

2273-8 

2276.9 

2279.9 

2283.0 

7500 

2286.0 

2289.1 

2292.1 

2295.1 

2298.2 

2301.2 

2304-3 

2307.3 

2310.4 

2313.4 

7600 

2316.5 

2319.5 

2322.6 

2325.6 

2328.7 

233L7 

2334.8 

2337.8 

2340.9 

2343.9 

7700 

2347.0 

2350.0 

2353.1 

2356.1 

2359.2 

2362.2 

2365-3 

2368.3 

2371.3 

2374.4 

7800 

2377-4 

2380.5 

2383.5 

2386.6 

2389.6 

2392.7 

2395.7 

2398.8 

2401.8 

2404.9 

7900 

2407.9 

24II.O 

2414.0 

24I7.I 

2420.  1 

2423.2 

2426.2 

2429.3 

2432.3 

24354 

8000 

2438.4 

2441.5 

2444.5 

2447-5 

2450.6 

2453-6 

2456.7 

2459.7 

2462.8 

2465.8 

8100 

2468.9 

2471.9 

2475.0 

2478.0 

2481.1 

2484.  i 

2487.2 

2490.2 

2493-3 

2496.3 

8200 

2499.4 

2502.4 

2505.5 

2508.5 

2511.6 

2514.6 

2517.7 

2520.7 

2523.7 

2526.8 

8300 

2529.8 

2532.9 

2535.9 

2539.0 

2542.0 

2545.1 

2548.1 

255L2 

2554.2 

2557.3 

8400 

2560.3 

2563.4 

2566.4 

2569.5 

2572.5 

2575.6 

2578.6 

2581.7 

2584.7 

2587.8 

8500 

2590.8 

2593-9 

2596.9 

2599.9 

2603.0 

2606.0 

2609.1 

26I2.I 

2615.2 

26l8.2 

8600 

2621.3 

2624.3 

2627.4 

2630.4 

2633.5 

2636.5 

2639.6 

2642.6 

2645.7 

2648.7 

8700 

2651.8 

2654.8 

2657.9 

2660.9 

2664.0 

2667.0 

2670.  i 

2673.1 

2676.1 

2679.2 

8800 

2682.2 

2685.3 

2688.3 

2691.4 

2694.4 

2697.5 

2700.5 

2703.6 

2706.6 

2709.7 

8900 

2712.7 

2715.8 

2718.8 

2721.9 

2724.9 

2728.0 

2731.0 

2734-1 

2737.1 

2740.2 

9000 

2743.2 

2746.3 

2749.3 

2752.3 

27554 

2758.4 

2761.5 

2764.5 

2767.6 

2770.6 

SMITHSONIAN  TABLES. 


201 


TABLE  67. 


METRES    INTO    FEET. 

i  metre  =  39.3700  inches  =  3.280833  feet 


M  vtes. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

0 

O.OO 

3-28 

6.56 

9-84 

13.12 

16.40 

19.68 

22.97 

26.25 

29-53 

10 

32.81 

36-09 

39-37 

42.65 

45-93 

49-21 

5249 

55-77 

59-°5 

62.34 

20 

65-62 

68.90 

72.18 

7546 

78-74 

82.02 

85.30 

88.58 

91.86 

95.14 

30 

98.42 

101.71 

104.99 

108.27 

in-55 

114.83 

118.11 

121.39 

124.67 

127.95 

40 

I3I-23 

134.51 

137-79 

141.08 

144.36 

147.64 

150.92 

154.20 

157.48 

160.76 

50 

164.04 

167.32 

170.60 

173-88 

177.16 

180.45 

183-73 

187.01 

190.29 

T93-57 

60 

196.85 

200.13 

203.41 

206.69 

209.97 

213.25 

216.53 

219.82 

223.10 

226.38 

70 

229.66 

232.94 

236.22 

239.50 

242.78 

246.06 

249-34 

252.62 

255.90 

259-I9 

80 

262.47 

26575 

269.03 

272.31 

275-59 

278.87 

282.15 

285-43 

288.71 

291.99 

90 

295.27 

298.56 

301.84 

305.12 

308.40 

311.68 

3H.96 

318.24 

321.52 

324.80 

100 

328.08 

33I-36 

334.64 

337-93 

341.21 

34449 

347-77 

35i.°5 

354-33 

357-6i 

110 

360.89 

364.17 

36745 

370.73 

374-01 

377-3° 

380.58 

383-86 

387-14 

390.42 

120 

393-70 

396.98 

400.26 

403.54 

406.82 

410.10 

413-38 

416.67 

4I9-95 

423-23 

130 

426.51 

429.79 

433.07 

436.35 

439.63 

442.91 

446.19 

449-47 

452.75 

.  456.04 

140 

459-32 

462.60 

465.88 

469.16 

472.44 

475-72 

479-0° 

482.28 

485-56 

488.84 

150 

492.12 

495-41 

498.69 

501.97 

505-25 

508.53 

511.81 

515-09 

518.37 

521.65 

160 

524.93 

528.21 

531-49 

534.78 

538.06 

541-34 

544.62 

547-9° 

55T.i8 

55446 

170 

557-74 

561.02 

564-3° 

567.58 

570.86 

574-15 

577-43 

580.71 

583-99 

587-27 

180 

590.55 

593.83 

597-n 

600.39 

603.67 

606.95 

610.23 

613-52 

616.80 

620.08 

190 

623.36 

626.64 

629.92 

633.20 

636.48 

639-76 

643.04 

646.32 

649.60 

652.89 

200 

656.17 

659.45 

662.73 

666.01 

669.29 

6/2.57 

675-85 

6/9-13 

682.41 

685.69 

210 

688.97 

692.26 

695-54 

698.82 

702.10 

705.38 

708.66 

711.94 

715.22 

718.50 

220 

721.78 

725.06 

728.34 

731.63 

734-91 

738.19 

74T-47 

744-75 

748.03 

75L3I 

230 

754.59 

757.87 

761.15 

76443 

767.71 

771.00 

774.28 

777-56 

780.84 

784.12 

240 

787.40 

790.68 

793.96 

797.24 

800.52 

803.80 

807.08 

810.37 

813-65 

816.93 

250 

820.21 

823.49 

826.77 

830.05 

833.33 

836.61 

839.89 

843-T7 

846.45 

849.74 

260 

853.02 

856.30 

859-58 

862.86 

866.14 

869.42 

872.70 

875-98 

879.26 

882.54 

270 

885.82 

889.11 

892.39 

895-67 

898.95 

902.23 

905-51 

908.79 

912.07 

9*5.35 

280 

918.63 

921.91 

925-19 

928.48 

93L76 

935-04 

938.32 

941.60 

944-88 

948.16 

290 

951-44 

954-72 

958.00 

961.28 

964-56 

967-85 

97I.I3 

974-41 

977.69 

980.97 

300 

984.25 

987.53 

990.81 

994.09 

997-37 

1000.65 

1003.93 

1007.22 

1010.50 

1013.78 

310 

1017.06 

1020.34 

1023.62 

1026.90 

1030.18 

1033.46 

1036.74 

1040.02 

1043.30 

1046.59 

320 

1049.87 

I053.I5 

1056.43 

1059.71 

1062.99 

1066.27 

1069.55 

1072.83 

1076.11 

1079.39 

33° 

1082.67 

1085.96 

1089.24 

1092.52 

1095.80 

1099.08 

1102.36 

1105.64 

1109.92 

1112.20! 

340 

1115.48 

1118.76 

1122.04 

"25.33 

1128.61 

1131-89 

"35-17 

"38.45 

II4I-73 

1145.01 

350 

1148.29 

"51-57 

"54-85 

"58.13 

1161.41 

1164.70 

1167.98 

1171.26 

"74-54 

H77.82| 

360 

1181.10 

1184.38 

1187.66 

1190.94 

1194.22 

1197.50 

1200.78 

1204.07 

1207.35 

I2IO.63  ! 

370  . 

1213.91 

1217.19 

1220.47 

1223.75 

1227.03 

1230.31 

1233-59 

1236.87 

1240.15 

1243-44; 

380 

1246.72 

1250.00 

1253.28 

1256.56 

1259.84 

1263.12 

1266.40 

1269.68 

1272.96 

1276.24! 

390 

1279.52 

1282.81 

1286.09 

1289.37 

1292.65 

1295.93 

1299.21 

1302.49 

1305-77 

1309.05 

400 

1312.33 

i3r5.6i 

1318.89 

1322.18 

1325-46 

1328.74 

1332.02 

1335.30 

1338.58 

1341.86  j 

410 

I345-I4 

1348.42 

1351.70 

1354.98 

1358.26 

1361.55 

1364.83 

1368.11 

1371.39 

1374.67 

420 

1377-95 

1381.23 

1384-51 

1387.79 

1391.07 

1394-35 

1397.63 

1400.92 

1404.20 

1407.48 

430 

1410.76 

1414.04 

1417.32 

1420.60 

1423.88 

1427.16 

1430.44 

I43372 

1437.00 

1440.29 

440 

1443-57 

1446.85 

H50.I3 

I4534I 

1456.69 

1459-97 

1463.25 

1466.53 

1469.81 

1473.09 

450 

1476.37 

1479.66 

1482.94 

1486.22 

1489.50 

1492.78 

1496.06 

1499-34 

1502.62 

i5°5-9° 

460 

1509.18 

1512.46 

1515.74 

1519-03 

1522.31 

1525.59 

1528.87 

1532.15 

1535-43 

1538.71 

470 

r54i.99 

1545-27 

1548.55 

1551-83 

1555-11 

1558.40 

1561.68 

1564.96 

1568.24 

1571-52 

480 

1574.80 

1578.08 

1581.36 

1584.64 

1587.92 

1591.20 

1594.48 

1597-77 

1601.05 

1604.33 

49° 

1607.61 

1610.89 

1614.17 

1617.45 

1620.73 

1624.01 

1627.29 

1630.57 

1633-85 

i637.i/  ? 

500 

1640.42 

1643.70 

1646.98 

1650.26 

1653-54 

1656.82 

1  660.  10 

1663.38 

1660.66 

1669.94  1| 

SMITHSONIAN  TABLES. 


2O2 


TABLE   67, 


METRES    INTO    FEET. 

i  metre  =  39.3700  inches  =  3.280833  feet 


Metres. 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

Feet. 

500 

1640.4 

1673.2 

1706.0 

1738.8 

I77I.6 

1804.5 

1837.3 

1870.1 

1902.9 

1935-7 

600 

1968.5 

2001.3 

2034.1 

2066.9 

2099.7 

2132-5 

2165.3 

2198.2 

2231.0 

2263.8 

700 

2296.6 

2329.4 

2362.2 

2395-0 

2427.8 

2460.6 

24934 

2526.2 

2559-0 

259L9 

800 

2624.7 

2657.5 

2690.3 

2723.1 

2755-9 

2788.7 

2821.5 

2854.3 

2887.1 

2919.9 

900 

2952.7 

2985.6 

3018.4 

3051.2 

3084.0 

3116.8 

3I49-6 

3182.4 

3215.2 

3248.0 

1000 

3280.8 

3313.6 

33464 

3379-3 

34I2.I 

3444-9 

3477-7 

3510.5 

3543-3 

3576.1 

1  100 

3608.9 

3641.7 

3674.5 

3707.3 

3740.1 

3773.0 

3805.8 

3838.6 

38714 

3904.2 

1  200 

3937-0 

3969.8 

4002.6 

4035-4 

4068.2 

4101.0 

4I33-8 

4166.7 

4I99-5 

4232.3 

1300 

4265.1 

4297.9 

4330.7 

4363-5 

4396.3 

4429.1 

4461.9 

4494-7 

4527-5 

4560.4 

1400 

4593'2 

4626.0 

4658.8 

4691.6 

4724.4 

4757.2 

4790.0 

4822.8 

4855-6 

4888.4 

1500 

4921.2 

4954-1 

4986.9 

50I9-7 

5052.5 

5085.3 

5118.1 

5150.9 

5183.7 

5216.5 

1600 

5249-3 

5282.1 

53H.9 

5347.8 

5380.6 

54134 

5446.2 

5479-0 

5511-8 

5544-6 

1700 

55774 

5610.2 

5643-0 

5675.8 

5708.6 

5741-5 

5774-3 

5807.1 

5839-9 

5872.7 

1800 

5905-5 

5938.3 

597LI 

6003.9 

6036.7 

6069.5 

6102.3 

6135-2 

6168.0 

6200.8 

1900 

6233.6 

6266.4 

6299.2 

6332.0 

6364.8 

6397.6 

6430.4 

6463.2 

6496.0 

6528.9 

2000 

6561.7 

6594.5 

6627.3 

6660.1 

6692.9 

6725-7 

6758.5 

6791.3 

6824.1 

6856.9 

2100 

6889.7 

6922.6 

6955-4 

6988.2 

7021.0 

7053.8 

7086.6 

7119.4 

7152.2 

7185.0 

22OO 

7217.8 

7250.6 

7283.4 

7316.3 

7349-1 

738i.9 

7414.7 

7447-5 

748o.3 

75I3-I 

2300 

7545-9 

7578.7 

7611.5 

7644-3 

7677.1 

7710.0 

7742.8 

7775-6 

7808.4 

7841.2 

24OO 

7874.0 

7906.8 

7939.6 

7972.4 

8005.2 

8038.0 

8070.8 

8103.7 

8136.5 

8169.3 

2500 

8202.1 

8234.9 

8267.7 

8300.5 

8333.3 

8366.1 

8398.9 

8431.7 

8464.5 

8497.4 

2600 

8530.2 

8563.0 

8595.8 

8628.6 

8661.4 

8694.2 

8727.0 

8759-8 

8792.6 

8825.4 

2700 

8858.2 

8891.1 

8923.9 

8956.7 

8989.5 

9022.3 

9055.I 

9087.9 

9120.7 

9T53-5 

2800 

9186.3 

9219.1 

925L9 

9284.8 

93  [7.6 

93504 

9383.2 

9416.0 

9448.8 

9481.6 

2900 

95144 

9547-2 

9580.0 

9612.8 

9645-6 

9678.5 

97II-3 

9744-1 

9776.9 

9809.7 

3000 

9842.5 

9875.3 

9908.  1 

9940.9 

9973-7 

10006.5 

10039.3 

10072.2 

10105.0 

10137.8 

3100 

10170.6 

10203.4 

10236.2 

10269.0 

10301.8 

10334.6 

10367.4 

10400.2 

10433.0 

10465.9 

3200 

10498.7 

10531-5 

10564.3 

10597.1 

10629.9 

10662.7 

Jo695.5 

10728.3 

10761.1 

10793.9 

33oo 

10826.7 

10859.6 

10892.4 

10925.2 

10958.0 

10990.8 

11023.6 

11056.4 

11089.2 

III22.O 

3400 

11154.8 

11187.6 

11220.4 

11253.3 

11286.1 

11318.9 

"35I-7 

11384.5 

H4I7.3 

II450.I 

3500 

r  1482.9 

H5I5.7 

U548.5 

H58I.3 

11614.1 

11647.0 

11679.8 

11712.6 

H7454 

II778.2 

3600 

11811.0 

11843.8 

11876.6 

11909.4 

11942.2 

11975.0 

12007.8 

12040.7 

12073.5 

I2I06.3 

3700 

12139.1 

12171.9 

12204.7 

12237.5 

12270.3 

12303.1 

12335.9 

12368.7 

12401.5 

12434.4 

3800 

12467.2 

12500.0 

12532.8 

12565.6 

12598.4 

12631.2 

12664.0 

12696.8 

12729.6 

12762.4 

3900 

12795.2 

12828.1 

12860.9 

12893.7 

12926.5 

12959-3 

12992.1 

13024.9 

I3057.7 

13090.5 

4000 

13123.3 

13156.1 

13188.9 

13221.8 

13254-6 

13287.4 

13320.2 

13353-0 

13385.8 

I34I8.6 

4100 

i345i-4 

13484.2 

I35I7.0 

13549-8 

13582.6 

13615-5 

13648.3 

13681.1 

I37I3.9 

13746.7 

4200 

13779-5 

13812.3 

I3845.I 

13877.9 

13910.7 

13943-5 

13976.3 

14009.2 

14042.0 

14074.8 

4300 

14107.6 

14140.4 

14173.2 

14206.0 

14238.8 

14271.6 

14304.4 

14337.2 

14370.0 

14402.9 

4400 

14435-7 

14468.5 

I450I.3 

I4534.I 

14566.9 

14599-7 

14632.5 

14665.3 

14698.1 

14730.9 

4500 

14763.7 

14796.6 

14829.4 

14862.2 

14895.0 

14927.8 

14960.6 

H9934 

15026.2 

I5059.0 

4600 

15091.8 

15124.6 

I5I574 

I5I90.3 

15223.1 

15255.9 

15288.7 

15321.5 

15354-3 

I5387.I 

4700 

I54I9-9 

15452.7 

15485.5 

I55I8.3 

I555I.I 

15584.0 

15616.8 

15649.6 

15682.4 

I57I5.2 

4800 

15748.0 

15780.8 

15813.6 

15846.4 

15879.2 

15912.0 

15944.8 

15977-7 

16010.5 

16043.3 

4900 

16076.1 

16108.9 

16141.7 

16174.5 

16207.3 

16240.1 

16272.9 

16305.7 

16338.5 

16371.4 

5000 

16404.2 

16437.0 

16469.8 

16502.6 

165354 

16568.2 

1  6601.  o 

16633.8 

16666.6 

[6699.4 

Tenths  of  a  metre.          o.i         0.2         0.3         0.4         0.5         0.6         0.7         0.8         0.9 

Feet.                             0.328     0.656     0.984      1.312      1.640      1.968      2.297      2.625      2.953 

SMITHSONIAN  TABLES. 


203 


TABLE  68. 


MILES    INTO    KILOMETRES. 

i  mile  =  1.609347  kilometres 


Miles. 

0 

. 

2 

3 

4 

5 

6 

7 

8 

9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

0 

0 

2 

3 

5 

6 

8 

10 

II 

13 

14 

10 

16 

18 

19 

21 

23 

24 

26 

27 

29 

31 

20 

32 

34 

35 

37 

39 

40 

42 

43 

45 

47 

30 

48 

50 

51 

53 

55 

56 

58 

60 

61 

63 

40 

64 

66 

68 

69 

7i 

72 

74 

76 

77 

79 

50 

80 

82 

84 

85 

87 

89 

90 

92 

93 

95 

60 

97 

98 

100 

101 

103 

105 

106 

108 

109 

in 

70 

H3 

114 

116 

117 

119 

121 

122 

124 

126 

127 

80 

129 

130 

132 

134 

J35 

137 

138 

140 

142 

143 

90 

145 

146 

148 

150 

151 

!53 

154 

156 

158 

159 

100 

161 

163 

164 

166 

167 

169 

171 

172 

174 

175 

no 

177 

179 

180 

182 

183 

185 

I87 

188 

190 

192 

120 

193 

195 

196 

198 

200 

201 

203 

204 

206 

208 

130 

209 

211 

212 

214 

216 

217 

2I9 

220 

222 

224 

140 

225 

227 

229 

230 

232 

233 

235 

237 

238 

240 

150 

241 

243 

245 

246 

248 

249 

251 

253 

254 

256 

i6b 

257 

259 

26l 

262 

264 

266 

267 

269 

27O 

272 

170 

274 

275 

277 

278 

280 

282 

283 

285 

286 

288 

180 

290 

291 

293 

295 

296 

298 

299 

301 

303 

304 

190 

306 

307 

309 

3H 

312 

314 

315 

317 

319 

320 

200 

322 

323 

325 

327 

328 

330 

332 

333 

335 

336 

2IO 

338 

340 

341 

343 

344 

346 

348 

349 

35i 

352 

22O 

354 

356 

357 

359 

36o 

362 

364 

365 

367 

369 

230 

370 

372 

373 

375 

377 

378 

380 

38i 

383 

385 

240 

386 

388 

389 

39i 

393 

394 

396 

398 

399 

401 

250 

402 

404 

406 

407 

409 

410 

412 

414 

4i5 

417 

260 

418 

420 

422 

423 

425 

426 

428 

430 

43i 

433 

270 

435 

436 

438 

439 

441 

443 

444 

446 

447 

449 

280 

45i 

452 

454 

455 

457 

459 

460 

462 

463 

465 

290 

467 

468 

470 

472 

473 

475 

476 

478 

480 

481 

300 

483 

484 

486 

488 

489 

49  1 

492 

494 

496 

497 

310 

499 

501 

502 

504 

505 

507 

509 

5io 

512 

513 

320 

515 

517 

5i8 

520 

521 

523 

525 

526 

528 

529 

330 

53i 

533 

534 

536 

538 

539 

54i 

542 

544 

546 

340 

547 

549 

550 

552 

554 

555 

557 

558 

560 

562 

350 

563 

565 

566 

568 

570 

57i 

573 

575 

576 

578 

360 

579 

58i 

583 

584 

586 

587 

589 

59i 

592 

594 

370 

595 

\js\s 

597 

599 

600 

602 

604 

605 

607 

608 

610 

380 

612 

5? 

613 

615 

616 

618 

620 

621 

623 

624 

626 

390 

628 

629 

631 

632 

634 

636 

637 

639 

641 

642 

400 

644 

645 

647 

649 

650 

652 

653 

655 

657 

658 

410 

660 

661 

663 

665 

666 

668 

669 

671 

673 

674 

420 

676 

678 

679 

681 

682 

684 

686 

687 

689 

690 

430 

692 

694 

695 

697 

698 

700 

702 

703 

705 

706 

440 

708 

710 

711 

713 

715 

716 

718 

719 

721 

723 

450 

724 

726 

727 

729 

73i 

732 

734 

735 

737 

739 

460 

740 

742 

744 

745 

747 

748 

750 

752 

753 

755 

470 
480 

756 
772 

758 
774 

760 
776 

761 
778 

763 
779 

764 
781 

766 
782 

768 
784 

769 
785 

771 

787 

490 

789 

790 

792 

793 

795 

797 

798 

800 

801 

803 

500 

805 

806 

808 

809 

811 

813 

814 

816 

818 

819 

510 

821 

822 

824 

826 

827 

829 

830 

832 

834 

835 

520 
530 

837 
853 

838 
855 

840 
856 

842 
858 

843 
859 

845 
861 

847 
863 

848 
864 

850 
866 

851 
867 

540 

869 

871 

872 

874 

875 

877 

879 

880 

882 

884 

550 

885 

887 

888 

890 

892 

893 

895 

896 

898 

900 

SMITHSONIAN  TABLES. 


204 


MILES    INTO    KILOMETRES. 


TABLE   68, 


Miles. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

km. 

550 

885 

887 

888 

890 

892 

893 

895 

896 

898 

900 

560 

901 

9°3 

904 

906 

908 

909 

9II 

9I2 

914 

916 

570 

917 

919 

921 

922 

924 

925 

927 

929 

930 

932 

580 

933 

935 

937 

938 

940 

941 

943 

945 

946 

948 

59° 

950 

95i 

953 

954 

956 

958 

959 

961 

962 

964 

600 

966 

967 

969 

970 

972 

974 

975 

977 

978 

980 

610 

982 

983 

985 

987 

988 

990 

99  1 

993 

995 

996 

620 

998 

999 

IOOI 

1003 

IOO4 

1006 

1007 

1009 

ion 

IOI2 

630 

1014 

1015 

1017 

1019 

IO2O 

1022 

1024 

1025 

1027 

1028 

640 

1030 

1032 

i°33 

1035 

1036 

1038 

1040 

1041 

1043 

1044 

650 

1046 

1048 

1049 

1051 

1053 

1054 

1056 

1057 

1059 

1061 

660 

1062 

1064 

1065 

1067 

1069 

1070 

1072 

1073 

1075 

1077 

670 

1078 

1080 

1081 

1083 

1085 

1086 

1088 

1090 

1091 

1093 

680 

1094 

1096 

1098 

1099 

IIOI 

1  102 

1104 

1106 

1107 

1109 

690 

IIIO 

III2 

1114 

IU5 

III7 

1118 

1120 

1122 

1123 

1125 

700 

1127 

1128 

1130 

1131 

H33 

1135 

1136 

II38 

H39 

1141 

710 

U43 

1144 

1146 

1147 

1149 

1151 

1152 

H54 

1156 

H57 

720 

H59 

1160 

1162 

1164 

1165 

1167 

1168 

1170 

1172 

H73 

730 

H75 

1176 

1178 

1180 

1181 

1183 

1184 

1186 

1188 

1189 

740 

1191 

H93 

1194 

1196 

1197 

1199 

I2OI 

1202 

1204 

1205 

750 

1207 

1209 

I2IO 

1212 

1213 

1215 

1217 

1218 

1220 

1221 

760 

1223 

1225 

1226 

1228 

1230 

1231 

1233 

1234 

1236 

I238 

770 

1239 

1241 

1242 

1244 

1246 

1247 

1249 

1250 

1252 

1254 

780 

1255 

1257 

1259 

I26O 

1262 

1263 

1265 

1267 

1268 

I27O 

790 

1271 

1273 

1275 

1276 

1278 

1279 

I28l 

1283 

1284 

1286 

800 

1287 

1289 

1291 

1292 

1294 

1296 

1297 

I299 

1300 

1302 

810 

1304 

1305 

1307 

1308 

1310 

1312 

13*3 

1315 

I3l6 

1318 

820 

1320 

1321 

1323 

1324 

1326 

1328 

1329 

1331 

1333 

1334 

830 

1336 

1337 

1339 

1341 

1342 

1344 

1345 

1347 

1349 

1350 

840 

1352 

1353 

1355 

1357 

1358 

1360 

1362 

1363 

1365 

I366 

850 

1368 

1370 

1371 

1373 

1374 

1376 

1378 

1379 

I38l 

1382 

860 

1384 

1386 

1387 

1389 

1390 

1392 

1394 

1395 

1397 

J399 

870 

1400 

1402 

1403 

1405 

1407 

1408 

1410 

I4II 

HI3 

1415 

880 

1416 

1418 

1419 

1421 

1423 

1424 

1426 

1427 

1429 

H3I 

890 

1432 

1434 

I436 

1437 

1439 

1440 

1442 

1444 

1445 

1447 

900 

1448 

1450 

M52 

1453 

1455 

1456 

1458 

1460 

I46l 

1463 

910 

1464 

1466 

1468 

1469 

1471 

1473 

1474 

1476 

1477 

1479 

920 

1481 

1482 

1484 

H85 

1487 

1489 

1490 

1492 

1493 

1495 

930 

1497 

1498 

1500 

1502 

1503 

1505 

1506 

I508 

1510 

1511 

940 

1513 

I5H 

1516 

1518 

1519 

1521 

1522 

1524 

1526 

1527 

950 

1529 

1530 

1532 

1534 

1535 

1537 

1539 

1540 

1542 

1543 

960 

1545 

1547 

1548 

1550 

i55i 

1553 

1555 

1556 

1558 

1559 

970 

1561 

1563 

1564 

1566 

1567 

1569 

I57i 

1572 

1574 

1576 

980 

1577 

1579 

1580 

1582 

1584 

1585 

1587 

1588 

159° 

1592 

990 

1593 

1595 

I596 

1598 

1600 

1601 

1603 

1605 

1606 

1608 

1000 

1609 

1611 

1613 

l6l4 

1616 

1617 

1619 

1621 

1622 

1624 

Miles.    km.     Miles.    km.     Miles.    km.     Miles. 

km. 

1000   1609    6000   9656   11000  17703   16000 

25750 

2000   3219    7000  11265   12000  19312   17000 

27359 

3000   4828    8000  12875   13000  20922   18000 

28968 

4000   6437    9000  14484   14000  22531   19000 

30578 

5000   8047   10000  16093   15000  24140   20000 

32187 

SMITHSONIAN  TABLES. 


205 


TABLE   69. 


KILOMETRES    INTO    MILES. 

i  kilometre  =  0.621370  mile. 


Kilo- 
metres. 

0 

' 

2 

3 

4 

5 

6 

7 

8 

9 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

0 

O.O 

0.6 

1.2 

1-9 

2-5 

3-1 

3.7 

4-3 

5-o 

5-6 

10 

6.2 

6.8 

7-5 

8.1 

8.7 

9-3 

9-9 

10.6 

II.  2 

II.  8 

20 

12.4 

13.0 

13-7 

14-3 

14-9 

15-5 

16.2 

16.8 

17.4 

iS.o 

30 

T8.6 

19-3 

19.9 

20.5 

21.  1 

21.7 

22.4 

23.0 

23-6 

24.2 

40 

24.9 

25.5 

26.1 

26.7 

27-3 

28.0 

28.6 

29.2 

29.8 

30.4 

50 

3I-I 

31-7 

32-3 

32-9 

33-6 

34-2 

34-8 

35-4 

36.0 

36.7 

60 

37-3 

37.9 

38.5 

39-i 

39-8 

40.4 

41.0 

41.6 

42.3 

42.9 

70 

43-5 

44.1 

44-7 

45-4 

46.0 

46.6 

47.2 

47-8 

48.5 

49.1 

80 

49-7 

50.3 

51.0 

51-6 

52.2 

52.8 

53-4 

54.i 

54-7 

55-3 

90 

55-9 

56.5 

57-2 

57-8 

58.4 

59-o 

59-7 

60.3 

60.9 

61.5 

100 

62.1 

62.8 

634 

64.0 

64.6 

65.2 

65-9 

66.5 

67.I 

67.7 

no 

68.4 

69.0 

69.6 

70.2 

70.8 

7L5 

72.1 

72.7 

73-3 

73-9 

120 

74-6 

75-2 

75-8 

76.4 

77-0 

77-7 

78.3 

78.9 

79-5 

80.2 

130 

80.8 

81.4 

82.0 

82.6 

83.3 

83-9 

84-5 

85-1 

85-7 

86.4 

140 

87.0 

87.6 

88.2 

88.9 

89-5 

90.1 

90.7 

9L3 

92.0 

92.6 

150 

93-2 

93-8 

94.4 

95-1 

95-7 

96.3 

96.9 

97-6 

98.2 

98.8 

160 

99-4 

100.0 

100.7 

101.3 

101.9 

102.5 

103.1 

103.8 

104.4 

105.0 

170 

105.6 

106.3 

106.9 

107.5 

108.1 

108.7 

109.4 

no.o 

110.6 

III.  2 

180 

in.  8 

112.5 

113.1 

II3-7 

H4.3 

115.0 

115.6 

116.2 

116.8 

II7.4 

190 

118.1 

118.7 

II9-3 

119.9 

120.5 

121.  2 

I2I.8 

122.4 

123.0 

123.7 

200 

124.3 

124.9 

125-5 

126.1 

126.8 

127.4 

128.0 

128.6 

129.2 

I29.9 

2IO 

i30-5 

131.1 

131-7 

132.4 

i33.o 

133-6 

134-2 

134.8 

135-5 

I36.I 

220 

136-7 

137.3 

137-9 

138-6 

139.2 

139-8 

140.4 

141.1 

141.7 

142.3 

230 

142.9 

143-5 

144.2 

144.8 

145-4 

146.0 

146.6 

147.3 

147.9 

148.5 

24O 

149.1 

149.8 

150.4 

151.0 

151.6 

152.2 

152.9 

153-5 

I54-I 

154.7 

250 

155-3 

156.0 

156.6 

157-2 

157-8 

158.4 

I59-I 

159.7 

160.3 

160.9 

260 

161.6 

162.2 

162.8 

163.4 

164.0 

164.7 

165.3 

165.9 

166.5 

167.1 

270 

167.8 

168.4 

169.0 

169.6 

170.3 

170.9 

171-5 

172.1 

172.7 

173-4 

280 

174.0 

174.6 

175-2 

175-8 

176.5 

I77.I 

177.7 

178.3 

179.0 

179.6 

290 

180.2 

180.8 

181.4 

182.1 

182.7 

183.3 

183-9 

184.5 

185.2 

185-8 

300 

186.4 

187.0 

187.7 

188.3 

188.9 

189.5 

190.1 

190.8 

191.4 

I92.O 

310 

192.6 

193.2 

193-9 

194-5 

I95-I 

195.7 

196.4 

197.0 

197.6 

198.2 

320 

198.8 

199-5 

200.1 

200.7 

201.3 

2OI-9 

202.6 

203.2 

203.8 

204.4 

330 

205.1 

205.7 

206.3 

206.9 

207.5 

208.2 

208.8 

209.4 

210.0 

210.6 

340 

211.3 

211.9 

212.5 

213.1 

213.8 

214.4 

215.0 

215.6 

216.2 

216.9 

350 

217.5 

218.1 

218.7 

219.3 

220.0 

220.6 

221.2 

221.8 

222.5 

223.1 

360 

223.7 

224.3 

224.9 

225.6 

226.2 

226.8 

227.4 

228.0 

228.7 

229.3 

370 

229.9 

230.5 

23I.I 

231.8 

232.4 

233-0 

233-6 

234-3 

234-9 

235.5 

380 

236.1 

236.7 

237-4 

238.0 

238.6 

239.2 

239.8 

240.5 

24I.I 

241.7 

39° 

242.3 

243.0 

243-6 

244.2 

244.8 

2454 

246.1 

246.7 

247.3 

247.9 

400 

248.5 

249.2 

249.8 

250.4 

251.0 

25L7 

252.3 

252.9 

253-5 

254.1 

410 

254.8 

255.4 

256.0 

256.6 

257.2 

257-9 

258.5 

259-1 

259-7 

260.4 

420 

261.0 

261.6 

262.2 

262.8 

263.5 

264.1 

264.7 

265.3 

265.9 

266.6 

430 

267.2 

-267.8 

268.4 

269.1 

269.7 

270.3 

270.9 

271.5 

272.2 

272.8 

440 

273-4 

274.0 

274.6 

275-3 

275-9 

276.5 

277.1 

277.8 

278.4 

279.0 

450 

279.6 

280.2 

280.9 

281.5 

282.1 

282.7 

283.3 

284.0 

284.6 

285.2 

460 

285.8 

286.5 

287.1 

287.7 

288.3 

288.9 

289.6 

290.2 

290.8 

291.4 

470 

292.0 

292.7 

293-3 

293-9 

294.5 

295-2 

295.8 

296.4 

297.0 

297.6 

480 

298.3 

298.9 

299-5 

300.1 

300.7 

301.4 

302.0 

3O2.6 

303.2 

303.8 

490 

304-5 

305.1 

305.7 

306.3 

307.0 

307.6 

308.2 

308.8 

309-4 

310.1 

500 

310.7 

311.3 

3H.9 

312.5 

3I3-2 

'313.8 

3H.4 

3T5.0 

315.7 

316.3 

5io 

316.9 

317.5 

3I8.I 

318.8 

3I9-4 

320.0 

320.6 

321.2 

321.9 

322.5 

520 

323-1 

323.7 

324.4 

325-0 

325.6 

326.2 

326.8 

327.5 

328.1 

328.7 

530 

329-3 

329-9 

330-6 

331-2 

331-8 

332.4 

333.1 

333-7 

334-3 

334-9 

540 

335-5 

336.2 

336.8 

337-4 

338.0 

338.6 

339.3 

339-9 

340.5 

34I-I 

SMITHSONIAN  TABLES. 


206 


KILOMETRES    INTO    MILES. 


TABLE   69 


Kilo- 
metres. 

0 

• 

2 

3 

4 

5 

6 

7 

8 

9 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Miles. 

Mile  . 

Miles. 

550 

341.8 

342.4 

343-0 

343-6 

344-2 

344-9 

345-5 

346.1 

346.7 

347-3 

560 

348.0 

348.6 

349-2 

349-8 

350.5 

35I-I 

351.7 

352.3 

352.9 

353-6 

570 

354-2 

354-8 

355-4 

356.0 

356.7 

357-3 

357-9 

358.5 

359-  2 

359-8 

580 

360.4 

361.0 

361.6 

362.3 

362.9 

363-5 

364.1 

364.7 

365-4 

366.0 

590 

366.6 

367.2 

367.9 

368.5 

369.1 

369-7 

370.3 

371.0 

371-6 

372-2 

600 

372.8 

373-4 

374-1 

374.7 

375-3 

375-9 

376.6 

377-2 

377-8 

378.4 

610 

379-o 

379-7 

380.3 

380.9 

38i.5 

382.1 

382.8 

383.4 

384.0 

384-6 

620 

385-2 

385-9 

386.5 

387-1 

387.7 

388.4 

389.0 

389-6 

390.2 

390-8 

630 

391-5 

392-1 

392.7 

393-3 

393-9 

394-6 

395-2 

395-8 

396.4 

397-1 

640 

397-7 

398.3 

398.9 

399-5 

400.2 

400.8 

401.4 

402.0 

402.6 

403-3 

650 

403.9 

404-5 

405.1 

405.8 

406.4 

407.0 

407.6 

408.2 

408.9 

409-5 

660 

410.1 

410.7 

4II-3 

412.0 

412.6 

4I3-2 

413.8 

414.5 

415-1 

4I5.7 

670 

416.3 

416.9 

417.6 

418.2 

418.8 

419.4 

420.0 

420.7 

421-3 

421.9 

680 

422.5 

423.2 

423.8 

424-4 

425.0 

425.6 

426.3 

426.9 

427.5 

428.1 

690 

428.7 

429.4 

430.0 

430.6 

431-2 

431-9 

432.5 

433-1 

433-7 

434-3 

700 

435-0 

435-6 

436.2 

436.8 

437-4 

438.1 

438.7 

439-3 

439-9 

440.6 

710 

441.2 

441.8 

442.4 

443-o 

443-7 

444-3 

444-9 

445-5 

446.1 

446.8 

720 

447-4 

448.0 

448.6 

449-3 

449.9 

450-5 

45i-i 

451-7 

452.4 

453-o 

730 

453-6 

454.2 

454-8 

455-5 

456.1 

456.7 

457-3 

457-9 

458.6 

459-2 

740 

459-8 

460.4 

461.1 

46i.7 

462.3 

462.9 

463-5 

464.2 

464.8 

465-4 

750 

466.0 

466.6 

467-3 

467.9 

468.5 

469.1 

469.8 

470.4 

471.0 

471.6 

760 

472.2 

472.9 

473-5 

474.1 

474-7 

475-3 

476.0 

476.6 

477-2 

477-8 

770 

478.5 

479.1 

479-7 

480.3 

480.9 

481.6 

482.2 

482.8 

483-4 

484.0 

780 

484.7 

485.3 

485-9 

486.5 

487.2 

487.8 

488.4 

489.0 

489.6 

490.3 

790 

490.9 

49!-5 

492.1 

492.7 

493.4 

494-0 

494-6 

495-2 

495-9 

496.5 

800 

497.1 

497-7 

498.3 

499-o 

499-6 

500.2 

500.8 

501.4 

502.1 

502.7 

810 

503-3 

503-9 

504.6 

505-2 

505-8 

506.4 

507-0 

507.7 

508.3 

508.9 

820 

509-5 

510.1 

510.8 

5II-4 

512.0 

512.6 

513.3 

513-9 

514.5 

515-1 

830 

5I5-7 

516.4 

5i7.o 

517.6 

518.2 

518.8 

5I9-5 

520.1 

520.7 

521.3 

840 

522.0 

522.6 

523-2 

523-8 

524.4 

525-1 

525-7 

526.3 

526.9 

527.5 

850 

528.2 

528.8 

529-4 

530.0 

530.6 

531-3 

531-9 

532-5 

533-1 

533-8 

860 

534-4 

535-0 

535-6 

536.2 

536.9 

537-5 

538.1 

538.7 

539-3 

540.0 

870 

540.6 

541.2 

541.8 

542.5 

543.1 

543-7 

544-3 

544-9 

545-6 

546.2 

880 

546.8 

547.4 

548.0 

548.7 

549-3 

549-9 

550.5 

55L2 

551-8 

552.4 

890 

553-0 

553-6 

554.3 

554-9 

555.5 

556.1 

556.7 

557-4 

558.0 

558.6 

900 

559-2 

659-9 

560.5 

561.1 

561.7 

562.3 

563-0 

563.6 

564.2 

564-8 

910 

565-4 

566.1 

566.7 

567-3 

567.9 

568.6 

569.2 

569.8 

570.4 

57i.o 

920 

571-7 

572-3 

572.9 

573-5 

574-1 

574.8 

575.4 

576.0 

576.6 

577.3 

930 

577-9 

578.5 

579-1 

579-7 

580.4 

581.0 

581.6 

582.2 

582.8 

583.5 

940 

584.1 

584-7 

585-3 

586.0 

586.6 

587-2 

587.8 

588.4 

589-1 

589.7 

950 

590-3 

590.9 

591-5 

592.2 

592.8 

593-4 

594-0 

594-7 

595-3 

595-9 

960 

596.5 

597-1 

597-8 

598.4 

599-0 

599-6 

600.2 

600.9 

601.5 

602.1 

970 

602.7 

603.4 

604.0 

604.6 

605.2 

605.8 

606.5 

607.1 

607.7 

608.3 

980 

608.9 

609.6 

610.2 

610.8 

611.4 

612.0 

612.7 

6i3-3 

613.9 

614.5 

990 

615.2 

615.8 

616.4 

617.0 

617.6 

618.3 

618.9 

619.5 

620.1 

620.7 

1000 

621.4 

622.0 

622.6 

623.2 

623.9 

624.5 

625.1 

625.7 

626.3 

627.0 

km.          Miles.          km.          Miles.          km.          Miles.           km. 

Miles. 

1000      621.4       6000    3728.2       II  000    6835.1       16000 

9941.9 

2000     1242.7        7000    4349.6      12000    7456.4      17000 

10563.3 

3000     1864.1       8000    4971.0      13000    8077.8       18000 

11184.7 

4000    2485.5       9000    5592.3      14000    8699.2       19000 

1  1  8o6.0 

5000    3106.8      10000    6213.7      15000    9320.5      20000 

12427.4 

SMITHSONIAN  TABLES. 


2O7 


TABLE   70. 

INTERCONVERSION    OF    NAUTICAL   AND    STATUTE    MILES. 

i  nautical  mile*  =  6080.27  feet- 


Nautical  Miles. 

Statute  Miles. 

Statute  Miles. 

Nautical  Miles. 

, 

1.1516 

1 

0.8684 

2 

2.3031 

2 

1.7368 

3 

34547 

3 

2.6052 

4 

4.6062 

4 

34736 

5 

5.7578 

5 

4.3420 

6 

6.9093 

6 

5.2104 

7 

8.0609 

7 

6.0788 

8 

9.2124 

8 

6.9472 

9 

10.3640 

9 

7.8155 

As  defined  by  the  United  States  Coast  Survey. 


TABLE   71. 


CONTINENTAL    MEASURES    OF    LENGTH    WITH    THEIR     METRIC    AND 

ENGLISH    EQUIVALENTS. 

The  asterisk  (*)  indicates  that  the  measure  is  obsolete  or  seldom  used. 


Measure. 

Metric  Equivalent. 

English  Equivalent. 

El  ^Netherlands)      .                 

i             metre. 

3  2808  feet. 

Fathom,  Swedish  —  6  feet  

1.7814       " 

5.8445     " 

Foot  Austrian*      

0.31608     " 

1.0370     " 

old  French* 

o  324.84.     " 

i  06^7     " 

Russian  

0.30480     " 

i              " 

Rheinlandisch  or  Rhenish  (Prussia*, 
Denmark,  Norway*). 
Swedish*                       

0.31385     " 
0.2060       " 

1.0297     " 
0.9741     " 

Spanish*  —  x/^  vara 

0.2786       " 

O.QI4.O      " 

*Klafter  Wiener  (Vienna)      

1.89648     " 

6.2221       " 

*I/ine   old  French  foot  

0.22558  cm. 

0.0888  inch. 

Mile  Austrian  post*  —  24000  feet 

7.^8sQ4  km. 

4  714    statute  miles 

1.852 

1.1508       "           " 

Swedish  —  36000  feet              ...... 

10.69 

6.642         "           " 

11.2986      " 

7.02           "           " 

Netherlands  (mill)                      

i               " 

0.6214       "           " 

Prussian  (law  of  1868)    . 
Danish                                  

7.500 
7.5^24      " 

4.660 
4.6804       "           " 

Palm   Netherlands  

o.i          metre. 

0.3281  feet. 

*Rode   Danish                           

3.7662 

12.356       " 

*  Ruthe   Prussian   Norwegian 

3.7662 

12   ^s6          '* 

Sa°"ene  (Russian)  

2.1336            " 

7              " 

*Toise  old  French  —  6  feet 

I  .Q4QO         *  ' 

6.3943     " 

*Vara   Spanish  "... 

0.8359     " 

2.7424     " 

Mexican          .        

0.8380 

2.7203     " 

Werst,  or  versta  (Russian)  =  500  sagene  .  . 

1.0668    km. 

3-500       " 

SMITHSONIAN  TABLES. 


208 


CONVERSION    OF   MEASURES    OF  TIME  AND  ANGLE. 


Arc  into  time TABLE  72 

Time  into  arc TABLE  73 

Days  into  decimals  of  a  year  and  angle TABLE  74 

Hours,  minutes  and  seconds  into  decimals  of  a  day  ...     .  TABLE  75 

Decimals  of  a  day  into  hours,  minutes  and  seconds  ....  TABLE  76 

Minutes  and  seconds  into  decimals  of  an  hour TABLE  77 

L/ocal  mean  time  at  apparent  noon        TABLE  78 

Sidereal  time  into  mean  solar  time TABLE  79 

Mean  solar  time  into  sidereal  time  TABLE  80 


20; 


TABLE   72. 


ARC    INTO    TIME. 


0 

h.  m. 

o 

h.  m. 

0 

h.  m. 

o 

h  m. 

o 

h.  m. 

o 

h.  m. 

/ 

m.  s. 

// 

s. 

0 

I 

2 

3 
4 
5 

6 

8 

9 

o  o 
o  4 
o  8 

0  12 

o  16 

0  20 

024 

o  28 

032 

o  36 

60 

6T 

62 

63 
64 

65 

66 
67 
68 
69 

4  o 
4  4 
4  8 
412 
4  16 
4  20 
424 
4  28 
432 
436 

120 

121 
122 
123 

124 

125 

126 
127 
128 
129 

8    o 
8    4 
8    8 
812 
8  16 

8  20 

8  24 
828 
832 
836 

180 

181 
182 

183 
184 
185 

186 
187 
188 
189 

12  0 

12  4 

12  8 
12  12 
12  16 
12  2O 
12  24 
12  28 
12  32 
12  36 

240 

241 
242 

243 
244 
245 

246 

247 
248 
249 

16  o 
16  4 
16  8 
16  12 
16  16 
16  20 
16  24 
1628 
1632 
1636 

300 

301 
302 
303 
3°4 
305 
306 

307 
308 

309 

20  o 
20  4 

20  8 
20  12 
20  l6 
20  20 
20  24 
20  28 
2032 
2036 

0 

i 

2 

3 
4 
5 
6 

8 
9 

o    o 
o    4 
o    8 

0  12 

o  16 
o  20 
o  24 

028 
032 
036 

0 

i 

2 

3 
4 
5 
6 

8 
9 

0.000 

0.067 

0-133 

0.200  | 
0.267  1 

0-333 
0.400 
0.467 

0-533 
0.600 

10 

o  40 

70 

440 

130 

840 

190 

12  40 

250 

16  40 

310 

2O  40 

10 

040 

10 

0.667 

ii 

12 
13 
M 

15 

16 

I? 
18 

19 

044 
048 

052 

056 

I  0 

i  4 
i  8 

I  12 

i  16 

7i 
72 

73 
74 
75 

76 

77 
78 
79 

444 
448 
452 
456 
5  o 
5  4 
5  8 
512 
5  16 

13* 
132 

^33 
134 
135 

136 
137 
138 
139 

844 
848 
852 
856 
9    o 
9    4 
9    8 
9  12 
9  16 

191 
192 

193 
194 
195 

196 
197 
198 
199 

1244 
1248 
12  52 
12  56 

13  o 

13  4 
13  8 
I3I2 

13  16 

251 
252 
253 
254 
255 
256 
257 
258 
259 

1644 
1648 
1652 
1656 
17  o 
17  4 
17  8 

17  12 

17  16 

3" 

312 

3i3 
3M 
315 

3i6 
317 
3i8 
3i9 

2044 
2048 
2052 
2056 
21  0 

21  4 

21  8 
21  12 
21  l6 

ii 

12 

13 
14 

15 

16 

17 
18 

19 

044 

o  48 

052 
056 

o 

4 
8 

12 

16 

ii 

12 

13 
14 

!5 

16 

17 
18 

19 

0-733 
0.800 
0.867 

0-933 
.000 
.067 
-133 

.200 
.267 

20 

I  20 

80 

5  20 

140 

9  20 

200 

13  20 

260 

17  20 

320 

21  2O 

20 

20 

20 

•333 

21 
22 

23 
24 

25 

26 

27 
28 
29 

I  24 
128 
I32 
136 
I  40 

i  44 
i  48 
i  52 
156 

Si 
82 
83 
84 
85 
86 

87 
88 
89 

524 
528 
532 
536 
540 
544 
548 
552 
556 

141 
142 

143 
144 
145 

146 
147 
148 
149 

924 
928 

932 
936 
940 

944 
948 
952 
9  56 

201 
202 
203 
204 

205 

206 
207 
208 
209 

13  24 
1328 
1332 
1336 
1340 
1344 
1348 
1352 
1356 

261 
262 
263 
264 
265 
266 
267 
268 
269 

17  24 
17  28 
1732 
1736 
1740 
1744 
1748 
1752 
17  56 

321 
322 
323 
324 
325 
326 
327 
328 
329 

21  24 
21  28 
21  32 
21  36 
21  40 

21  44 

21  48 
21  52 
21  56 

21 
22 
23 

24 

25 

26 

27 
28 
29 

24 

28 

32 
36 
40 
i  44 
i  48 
152 
156 

21 
22 

23 

24 

25 

26 

27 
28 
29 

.400 
.467 

•533 
.600 
.667 

-733 
.800 
.867 
•933 

30 

2  0 

90 

6  o 

150 

10    o 

210 

14  o 

270 

18  o 

330 

22  O 

30 

2     0 

30 

2.OOO 

3i 

3'2 

33 
34 
35 

36 
37 
38 
39 

2  4 
2  8 
2  12 
2  16 
2  2O 
224 
2  28 
2  32 
236, 

9i 
92 
93 
94 
95 
96 
97 
98 
99 

6  4 
6  8 

6  12 

6  16 

6  20 

6  24 
6  28 
632 
636 

I5i 
152 
153 
154 
155 
156 
157 
158 
159 

10    4 
10    8 

10  12 

10  16 

10  20 

10  24 

1028 

10  32 
10  36 

211 
212 
213 
214 

215 

216 
217 
218 
219 

14  4 
14  8 

14  12 

14  16 
14  20 
1424 
1428 
1432 
1436 

271 
272 
273 
274 
275 
276 

277 
278 

279 

18  4 
18  8 
18  12 
1816 
18  20 
18  24 
1828 
1832 
1836 

33i 
332 
333 
334 
335 
336 
337 
338 
339 

22  4 
22  8 
22  12 
22  l6 
22  20 
22  24 
2228 
2232 
22  36 

3i 
32 
33 
34 
35 
36 

% 

39 

2    4 

2     8 
2  12 
2  16 
2  2O 
2  24 
2  28 
232 
236 

3i 
32 
33 
34 
35 
36 
37 
38 
39 

2.067 

2.133 
2.2OO 
2.267 

2-333 
2.400 
2.467 

2-533 
2.600 

40 

2  40 

100 

6  40 

160 

10  40 

220 

1440 

280 

18  40 

340 

22  40 

40 

2  40 

40 

2.667 

4i 
42 

43 
44 
45 

46 
47 
48 

49 

244 
248 
2  52 
256 

3  o 
3  4 
3  8 
3  12 

316 

101 
102 
I03 
104 

105 

106 
107 
108 
109 

644 
648 
652 
656 
7  o 
7  4 
7  8 
7  12 
716 

161 
162 
163 
164 
165 
166 
167 
1  68 
169 

1044 

1048 
1052 
1056 

II     0 

ii    4 
ii    8 

II  12 

ii  16 

221 
222 
223 
224 

225 

226 

227 
228 
229 

1444 
1448 
1452 
1456 
15  o 
15  4 
15  8 
15  12 
15  16 

281 
282 
283 
284 
285 
286 
287 
288 
289 

1844 
1848 
1852 
1856 
19  o 
19  4 
19  8 
19  12 
19  16 

34i 
342 
343 
344 
345 
346 
347 
348 
349 

2244 
2248 
22  52 
22  56 

23  o 

23  4 
23  8 

23  12 

23  16 

41 
42 

43 
44 
45 

46 

47 
48 
49 

244 
248 
252 
256 

3    o 
3    4 
3    8 
3  12 
3i6 

4i 
42 
43 
44 
45 
46 
47 
48 
49 

2-733 
2.800 
2.867 

2-933 
3.000 
3.067 

3-133 
3.200 
3.267 

50 

3  20 

110 

7  20 

170 

II  20 

230 

15  20 

290 

19  20 

350 

23  20 

50 

3  20 

50 

3-333 

5i 
52 
53 
54 
55 
56 

8 

59 

3  24 
328 

332 
336 
340 
344 
348 
352 
356 

in 

112 

"3 

114 

115 

116 
117 
118 
119 

724 
728 
732 
736 
740 

744 
748 
752 
756 

171 
172 
173 
174 
175 
176 
177 
178 
179 

II  24 
II  28 
II  32 
II  36 
II  40 

ii  44 
ii  48 
ii  52 
ii  56 

231 
232 
233 
234 
235 
236 
237 
238 
239 

15  24 
15  28 
15  32 
15  36 
1540 
1544 
1548 
15  52 
15  56 

291 
292 

293 
294 
295 

296 

297 
298 

299 

1924 
19  28 
1932 
1936 
1940 
1944 
1948 
1952 
1956 

35i 
352 
353 
354 
355 
356 
357 
358 
359 

23  24 
2328 
2332 
2336 
2340 
2344 
2348 
2352 
2356 

5i 
.  52 
53 
54 
55 
56 
57 
58 

1    5q 

324 
328 
332 
336 

3  40 
344 
348 
352 
3  56 

5i 
52 
53 
54 
55 
56 
57 
58 
59 

3-4oo 
3.467 
3-533 
3.600 

3-667 

3-733 
3.800 
3.867 
3-933 

60 

4  o 

120 

8  o 

180 

12     0 

240 

16  o 

300 

20  0 

360 

24  o 

60 

4    o 

60 

4.000 

SMITHSONIAN  TABLES. 


2IO 


TIME    INTO    ARC. 


TABLE   73. 


Hours 

into    Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

Time. 

Arc. 

hrs. 

o 

hrs. 

o 

hrs. 

0 

hrs. 

o 

hrs. 

o 

hrs. 

0 

| 

15 

5 

75 

9 

135 

13 

195 

17 

255 

21 

315 

2 

3° 

6 

90 

10 

150 

14 

210 

18 

270 

22 

33° 

3 

45 

7 

105 

II 

165 

15 

225 

19 

285 

23 

345 

4 

60 

8 

1  20 

12 

1  80 

16 

240 

20 

300 

24 

Minutes    of  Time    into    Arc. 

Seconds  of  Time    into  Arc. 

m. 

0          / 

m. 

0          / 

m. 

0           / 

s. 

s 

s. 

1 

O 

15 

21 

5    15 

41 

10   15 

1 

o    15 

21 

5    15 

41 

10   15 

2 

O 

30 

22 

5   30 

42 

10  30 

2 

o    3° 

22 

5  30 

42 

10  '30 

3 

o 

45 

23 

5  45 

43 

10  45 

3 

o    45 

23 

5   45 

43 

10  45 

4 

I 

o 

24 

6 

o 

44 

II       0 

4 

I        O 

24 

6     o 

44 

II       0 

5 

I 

15 

25 

6   15 

45 

ii    15 

5 

i    15 

25 

6   15 

45 

ii    15 

6 

I 

3° 

26 

6   30 

46 

ii   30 

6 

i    30 

26 

6  3° 

46 

ii   30 

7 

I 

45 

27 

6  45 

47 

ii   45 

7 

i    45 

27 

6  45 

47 

ii   45 

8 

2 

o 

28 

7 

o 

48 

12       0 

8 

2        0 

28 

7      o 

48 

12       0 

9 

2 

15 

29 

7    15 

49 

12     15 

9 

2      15 

29 

7    15 

49 

12     15 

10 

2 

30 

30 

7   30 

50 

12    30 

10 

2     30 

30 

7  30 

50 

12    30 

ii 

2 

45 

31 

7  45 

51 

12  45 

ii 

2     45 

31 

7  45 

51 

12  45 

12 

3 

o 

32 

8 

o 

52 

13     o 

12 

^        O 

32 

8     o 

52 

13     o 

13 

3 

15 

33 

8 

15 

53 

13     15 

13 

3    15 

33 

8  15 

53 

13     15 

14 

3 

30 

34 

8  30 

54 

13    30 

H 

3    30 

34 

8  30 

54 

13    30 

15 

3 

45 

35 

8  45 

55 

13  45 

15 

3    45 

35 

8  45 

55 

13  45 

16 

4 

0 

36 

9 

o 

56 

•14 

0 

16 

4      o 

36 

9     o 

56 

14     o 

17 

4 

15 

37 

9 

15 

57 

14   15 

17 

4    15 

37 

9   15 

57 

H   15 

18 

4 

30 

38 

9 

30 

58 

14  30 

18 

4    30 

38 

9  30 

58 

14  30 

19 

4 

45 

39 

9 

45 

59 

14  45 

19 

4    45 

39 

9  45 

59 

14  45 

20 

5 

o 

40 

10 

0 

60 

15 

0 

20 

5      o 

40 

10       0 

60 

15       0 

Hundredths    of   a    Second    of  Time   into    Arc. 

Hundredth! 

of  a  Sec- 

.00 

.01 

.02 

.03 

.04 

.05 

.06 

.07 

.08 

.09 

ondof  Time. 

s. 

o.oo 

o.oo 

o'.'is 

0.30 

045 

0.60 

o'75 

090 

i.'os 

i.  20 

i./35 

.10 

1.50 

1-65 

i.  80 

i-95 

2.IO 

2.25 

2.40 

2-55 

2.70 

2.85 

.20 

3-0° 

3-15 

3-30 

3-45 

3-60 

3-75 

3-90 

4-05 

4.20 

4-35 

.30 

4-50 

4-65 

4.80 

4-95 

5-io 

5-25 

5-40 

5-55 

5.70 

5-85 

.40 

6.00 

6.15 

6.30 

6-45 

6.60 

6.75 

6.90 

7-05 

7.20 

7-35 

0.50 

7-50 

7-65 

7.80 

7.95 

8.10 

8.25 

8.40 

8-55 

8.70 

8.85 

.60 

9.00 

9.15 

9-30 

9-45 

9.60 

9-75 

9.90 

10.05 

10.20 

10.35 

.70 

10.50 

10.65 

10.80 

10.95 

II.  10 

11.25 

11.40 

II-55 

11.70 

11-85 

.80 

I2.OO 

12.15 

12.30 

12.45 

12.60 

12.75 

12.90 

13-05 

13.20 

13-35 

.90 

I3-50 

13-65 

13.80 

13-95 

14.10 

14-25 

14.40 

14-55 

14.70 

14.85 

SMITHSONIAN    TABLES. 


211 


TABLE   74-. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Common 
Year. 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

1 

o.ooooo 

0°  0' 

Jan.  i 

Jan.  i 

51 

0.13689 

49°  17' 

Feb.  20 

Feb.  20 

2 

.00274 

o  59 

2 

2 

52 

•13963 

50  16 

21 

21 

3 

.00548 

i  58 

3 

3 

53 

.14237 

51  15 

22 

22 

4 

.00821 

2  57 

4 

4 

54 

.14511 

52  14 

23 

23 

5 

0.01095 

3  57 

5 

5 

55 

0.14784 

53  13 

24 

24 

6 

.01369 

4  56 

6 

6 

56 

.15058 

54  13 

25 

25 

7 

.01643 

5  55 

7 

7 

57 

.15332 

55  12 

26 

26 

8 

.01916 

6  54 

8 

8 

58 

.15606 

56  ii 

27 

27 

9 

.02190 

7  53 

9 

9 

59 

.15880 

57  10 

28 

28 

10 

0.02464 

8  52 

10 

10 

60 

0.16153 

58  9 

Mar.  i 

29 

ii 

.02738 

9  5i 

ii 

ii 

61 

.16427 

59  8 

2 

Mar.  i 

12 

.03011 

10  51 

12 

12 

62 

.16701 

60  7 

3 

2 

13 

.03285 

ii  50 

13 

13 

63 

•16975 

61  7 

4 

3 

14 

.03559 

12  49 

14 

14 

64 

.17248 

62  6 

5 

4 

15 

0.03833 

13  48 

15 

15 

65 

0.17522 

63  5 

6 

5 

16 

.04107 

14  47 

16 

16 

66 

.17796 

64  4 

7 

6 

17 

.04381 

15  46 

17 

17 

67 

.  18070 

65  3 

8 

7 

18 

.04654 

16  45 

18 

18 

68 

.18344 

66  2 

9 

8 

19 

.04928 

17  44 

19 

19 

69 

.18617 

67  i 

10 

9 

20 

0.05202 

18  44 

20 

20 

70 

0.18891 

68  o 

ii 

10 

21 

.05476 

19  43 

21 

21 

71 

.19165 

69  o 

12 

ii 

22 

.05749 

20  42 

22 

22 

72 

.19439 

69  59 

13 

12 

23 

.06023 

21  41 

23 

23 

73 

.19713 

70  58 

14 

13 

24 

.06297 

22  40 

24 

24 

74 

.19986 

7i  57 

15 

14 

25 

0.06571 

23  39 

25 

25 

75 

0.20260 

72  56 

16 

15 

26 

.06845 

24  38 

26 

26 

76 

.20534 

73  55 

17 

16 

27 

.07118 

25  38 

27 

27 

77 

.20808 

74  54 

18 

17 

28 

.07392 

26  37 

28 

28 

78 

.21081 

75  54 

19 

18 

29 

.07666 

27  36 

29 

29 

79 

•21355 

76  53 

20 

19 

30 

0.07940 

28  35 

30 

3° 

80 

0.21629 

77  52 

21 

20 

31 

.08214 

29  34 

31 

31 

Si 

.21903 

78  51 

22 

21 

32 

.08487 

30  33 

Feb.  i 

Feb.  i 

82 

.22177 

79  50 

23 

22 

33 

.08761 

31  32 

2 

2 

83 

.22450 

80  49 

24 

23 

34 

•09035 

32  32 

3 

3 

84 

.22724 

81  48 

25 

24 

35 

0.09309 

33  3i 

4 

4 

85 

0.22998 

82  48 

26 

25 

36 

.09582 

34  30 

5 

5 

86 

.23272 

83  47 

27 

26 

37 

.09856 

35  29 

6 

6 

87 

.23546 

84  46 

28 

27 

38 

.10130 

36  28 

7 

7 

88 

.23819 

85  45 

29 

28 

39 

.10404 

37  27 

8 

8 

89 

.24093 

86  44 

30 

29 

40 

o.  10678 

38  26 

9 

9 

90 

0.24367 

87  43 

31 

30 

41 

.10951 

39  26 

10 

10 

91 

.24641 

88  42 

Apr.  i 

31 

42 

.11225 

40  25 

ii 

ii 

92 

.24914 

89  42 

2 

Apr.  i 

43 

.11499 

41  24 

12 

12 

93 

.25188 

90  41 

3 

2 

44 

.11773 

42  23 

13 

13 

94 

.25462 

91  40 

4 

3 

45 

0.12047 

43  22 

14 

14 

95 

0.25736 

92  39 

5 

4 

46 

.  12320 

44  21 

15 

15 

96 

.26010 

93  38 

6 

5 

.12594 

45  20 

16 

16 

97 

.26283 

94  37 

7 

6 

48 

.12868 

46  19 

17 

17 

98 

.26557 

95  36 

8 

7 

49 

.13142 

47  19 

18 

18 

99 

.26831 

96  35 

9 

8 

50 

0.13415 

48  18 

19 

19 

100 

0.27105 

97  35 

10 

9 

SMITHSONIAN  TABLES. 


212 


TABLE   74. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Day 
of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Common 
Year. 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

101 

0.27379 

98°34/ 

Apr.  ii 

Apr.  10 

151 

0.41068 

147°  51' 

May  31 

May  30 

102 

.27652 

99  33 

12 

IT 

152 

.41342 

148  50 

June  i 

31 

103 

.27926 

loo  32 

13 

12 

153 

.41615 

149  49 

2 

June  i 

104 

.28200 

101  31 

14 

13 

154 

.41889 

150  48 

3 

2 

105 

0.28474 

102  30 

15 

14 

155 

0.42163 

151  47 

4 

3 

106 

.28747 

103  29 

16 

15 

156 

•42437 

152  46 

5 

4 

107 

.29021 

104  29 

17 

16 

157 

.42710 

153  45 

6 

5 

108 

.29295 

105  28 

18 

17 

158 

.42984 

154  45 

7 

6 

109 

.29569 

106  27 

19 

18 

159 

.43258 

155  44 

8 

7 

MO 

0.29843 

107  26 

20 

19 

160 

0.43532 

156  43 

9 

8 

in 

.30116 

108  25 

21 

20 

161 

.43806 

157  42 

10 

9 

112 

.30390 

109  24 

22 

21 

162 

.44079 

158  41 

ii 

10 

H3 

.30664 

no  23 

23 

22 

163 

•44353 

159  40 

12 

n 

114 

•30938 

in  23 

24 

23 

164 

.44627 

160  39 

13 

12 

115 

0.31211 

112  22 

25 

24 

165 

0.44901 

161  39 

14 

13 

116 

•31485 

113  21 

26 

25 

166 

.45175 

162  38 

15 

14 

117 

•31759 

114  2O 

27 

26 

167 

.45448 

163  37 

16 

15 

118 

•32033 

H5  19 

28 

27 

1  68 

•45722 

164  36 

17 

16 

119 

.32307 

116  18 

29 

28 

169 

.45996 

165  35 

18 

17 

120 

0.32580 

117  17 

30 

29 

170 

0.46270 

166  34 

J9 

18 

121 

•32854 

118  17 

May  i 

30 

IT- 

•46543 

167  33 

20 

19 

122 

.33128 

119  16 

2 

May  i 

172 

.46817 

16833 

21 

20 

I23 

.33402 

120  15 

3 

2 

173 

.47091 

169  32 

22 

21 

124 

.33676 

121  14 

4 

3 

174 

•47365 

170  31 

23 

22 

125 

0-33949 

122  13 

5 

4 

175 

0.47639 

171  30 

24 

23 

126 

.34223 

123  12 

6 

5 

176 

.47912 

172  29 

25 

24 

127 

•34497 

124  II 

7 

6 

177 

.48186 

173  28 

26 

25 

128 

-34771 

125  10 

8 

7 

178 

.48460 

174  27 

27 

26 

129 

.35044 

126  10 

9 

8 

179 

.48734 

175  26 

28 

27 

130 

0.35318 

127  9 

10 

9 

180 

0.49008 

176  26 

29 

28 

131 

•35592 

128  8 

ii 

10 

181 

.49281 

177  25 

30 

29 

132 

.35866 

129  7 

12 

ii 

182 

•49555 

178  24 

July  i 

30 

133 

.36140 

130  6 

13 

12 

183 

.49829 

179  23 

2 

July  i 

134 

•36413 

131  5 

14 

13 

184 

.50103 

l8o  22 

3 

2 

135 

0.36687 

132  4 

15 

14 

185 

0.50376 

181  21 

4 

3 

136 

.36961 

133  4 

16 

15 

186 

.50650 

l82  20 

5 

4 

137 

.37235 

134  3 

17 

16 

187 

.50924 

183  20 

6 

5 

138 

.37509 

135   2 

18 

17 

188 

.51198 

184  19 

7 

6 

139 

.37782 

136  i 

19 

18 

189 

.51472 

185  18 

8 

7 

140 

0.38056 

137  o 

20 

19 

190 

0.51745 

186  17 

9 

8 

141 

.38330 

137  59 

21 

20 

191 

.52019 

187  16 

10 

9 

142 

.38604 

13858 

22 

21 

192 

•52293 

188  15 

ii 

10 

143 

.38877 

139  58 

23 

22 

193 

.52567 

189  14 

12 

ii 

144 

•39I5i 

HO  57 

24 

23 

194 

.52841 

190  14 

13 

12 

145 

0.39425 

141  56 

25 

24 

195 

0.53H4 

191  13 

14 

13 

146 

.39699 

142  55 

26 

25 

196 

.53388 

192  12 

15 

14 

147 

•39973 

143  54 

27 

26 

197 

.53662 

193  II 

16 

15 

148 

.40246 

M4  53 

28 

27 

198 

.53936 

194  10 

17 

16 

149 

.40520 

145  52 

29 

28 

199 

.54209 

J95  9 

18 

17 

150 

0.40794 

146  51 

30 

29 

200 

0.54483 

196  8 

19 

18 

SMITHSONIAN  TABLES. 


213 


TABLE    74. 


DAYS    INTO    DECIMALS    OF  A  YEAR    AND    ANGLE. 


Day 

of 
Year. 

Decimal 
of 
a  Year. 

Angle. 

Day  of  Month. 

Day 
of 
i  ear. 

Decimal 
of 
a  Year. 

Angle. 

[ 
Day  of  Month. 

Common 
Year. 

Bissextile 
Year. 

Common 
Year. 

Bissextile 
Year. 

201 

0-54757 

197°  8' 

July  20 

July  19 

251 

0.68446 

246°  24' 

Sept.  8 

Sept.  7 

202 

•55031 

198  7 

21 

20 

252 

.68720 

247  24 

9 

8 

203 

.55305 

199  6 

22 

21 

253 

.68994 

248  23 

10 

9 

204 

•55578 

200  5 

23 

22 

254 

.69268 

249  22 

ii 

10 

205 

0-55852 

201  4 

24 

23 

255 

0.69541 

250  21 

12 

ii 

206 

.56126 

202   3 

25 

24 

256 

.69815 

251  20 

*3 

12 

207 

.56400 

203   2 

26 

25 

257 

.70089 

252  19 

14 

13 

208 

.56674 

204   I 

27 

26 

258 

.70363 

253  18 

15 

14 

209 

.56947 

205   I 

28 

27 

259 

.70637 

254  17 

16 

15 

210 

0.57221 

206  o 

29 

28 

260 

0.70910 

255  *7 

17 

16 

211 

•57495 

206  59 

30 

29 

261 

.71184 

256  16 

18 

17 

212 

.57769 

207  58 

31 

30 

262 

.71458 

257  15 

J9 

18 

213 

.58042 

208  57 

Aug.  i 

31 

263 

.71732 

258  14 

20 

19 

214 

•58316 

209  56 

2 

Aug.  i 

264 

.72005 

259  13 

21 

20 

215 

0.58590 

210  55 

3 

2 

265 

0.72279 

260  12 

22 

21 

216 

.58864 

211  55 

4 

3 

266 

.72553 

26l  II 

23 

22 

217 

•59!38 

212  54 

5 

4 

267 

.72827 

262  II 

24 

23 

218 

•594" 

213  53 

6 

5 

268 

.73101 

263  10 

25 

24 

219 

.59685 

214  52 

7 

6 

269 

•73374 

264  9 

26 

25 

220 

0-59959 

215  5i 

8 

7 

270 

0.73648 

265  8 

27 

26 

221 

.60233 

216  50 

9 

8 

271 

•73922 

266  7 

28 

27 

222 

.60507 

217  49 

10 

9 

272 

.74196 

267  6 

29 

28 

223 

.60780 

218  49 

ii 

10 

273 

.74470 

268  5 

30 

29 

224 

.61054 

219  48 

12 

ii 

274 

•74743 

269  5 

Oct.  i 

30 

225 

0.61328 

220  47 

13 

12 

275 

0.75017 

270  4 

2 

Oct.  i 

226 

.61602 

221  46 

14 

13 

276 

•75291 

271  3 

3 

2 

227 

.61875 

222  45 

15 

14 

277 

.75565 

272  2 

4 

3 

228 

.62149 

223  44 

16 

15 

278 

•75838 

273  i 

5 

4 

229 

.62423 

224  43 

17 

16 

279 

.76112 

274  o 

6 

5 

230 

0.62697 

225  43 

18 

17 

280 

0.76386 

274  59 

7 

6 

231 

.62971 

226  42 

J9 

18 

281 

.76660 

275  59 

8 

7 

232 

•63244 

227  41 

20 

19 

282 

.76934 

276  58 

9 

8 

233 

.63518 

228  40 

21 

20 

283 

.77207 

277  57 

10 

9 

234 

.63792 

229  39 

22 

21 

284 

.77481 

27856 

ii 

10 

235 

o.  64066 

230  38 

23 

22 

285 

0-77755 

279  55 

12 

ii 

236 

.64339 

231  37 

24 

23 

286 

.78029 

280  54 

13 

12 

237 

•64613 

232  36 

25 

24 

287 

•78303 

281  53 

14 

13 

238 

.64887 

233  36 

26 

25 

288 

•78576 

282  52 

15 

14 

239 

.65161 

234  35 

27 

26 

289 

.78850 

283  52 

16 

15 

240 

0.65435. 

235  34 

28 

27 

290 

0.79124 

284  51 

17 

16 

241 

.65708 

236  33 

29 

28 

291 

•79398 

285  50 

18 

17 

242 

.65982 

237  32 

30 

29 

292 

.79671 

286  49 

19 

18 

243 

.66256 

238  31 

31 

30 

293 

•79945 

287  48 

20 

19 

244 

.66530 

239  30 

Sept.  i 

31 

294 

.80219 

288  47 

21 

20 

245 

0.66804 

240  30 

2 

Sept.  i 

295 

0.80493 

289  46 

22 

21 

246 

.67077 

241  29 

3 

2 

296 

.80767 

290  46 

23 

22 

247 

.67351 

242  28 

4 

3 

297 

.81040 

291  45 

24 

23 

248 

.67625 

243  27 

5 

4 

298 

.81314 

292  44 

25 

24 

249 

•67899 

244  26 

6 

5 

299 

.81588 

293  43 

26 

25 

250 

0.68172 

245  25 

7 

6 

300 

0.81862 

294  42 

27 

26 

SMITHSONIAN  TABLES. 


214 


TABLE   74. 


DAYS    INTO    DECIMALS    OF   A    YEAR    AND    ANGLE. 


Day  of    Month. 

Day  of    Month. 

Day 

Decimal 

Day 

Decimal 

of 

of 

Angle. 

of 

of 

Angle. 

Year. 

a  Year. 

Common 

Bissextile 

Year. 

a  Ytar. 

Common 

Bissextile 

Year 

Year. 

Year. 

Year. 

301 

0.82136 

295°4i' 

Oct.  28 

Oct.  27 

351 

0.95825 

344°58' 

Dec.  17 

Dec.  1  6 

302 

.82409 

296  40 

29 

28 

352 

.96099 

345  57 

18 

17 

303 

.82683 

297  40 

30 

29 

353 

.96372 

346  56 

19 

18 

304 

•82957 

298  39 

3i 

30 

354 

.96646 

347  56 

20 

J9 

305 

0.83231 

299  38 

Nov.    i 

31 

355 

0.96920 

348  55 

21 

20 

306 

•83504 

300  37 

2 

Nov.  i 

356 

.97194 

349  54 

22 

21 

307 

.83778 

301  36 

3 

2 

357 

.97467 

350  53 

23 

22 

308 

.84052 

302  35 

4 

3 

358 

•97741 

35i  52 

24 

23 

309 

.84326 

303  34 

5 

4 

359 

.98015 

352  51 

25 

24 

310 

0.84600 

304  34 

6 

5 

360 

0.98289 

353  50 

26 

25 

3ii 

.84873 

305  33 

7 

6 

36i 

•98563 

354  50 

27 

26 

312 

.85147 

306  32 

8 

7 

362 

.98836 

355  49 

28 

27 

313 

.85421 

307  3i 

9 

8 

1  363 

.99110 

356  48 

29 

28 

3H 

•85695 

308  30 

10 

9 

364 

.99384 

357  47 

30 

29 

315 

0.85969 

309  29 

ii 

10 

365 

0.99658 

358  46 

31 

30 

3i6 

.86242 

310  28 

12 

ii 

366 

•99932 

359  45 

31 

3J7 

.86516  . 

311  27 

13 

12 

3i8 

.86790 

312  27 

14 

13 

3i9 

.87064 

313  26 

15 

14 

Conversion  for  Hours. 

Conversion  for  Minutes. 

320 

321 
322 

0.87337 
.87611 
.87885 

3H  25 
315  24 
316  23 

16 

17 
18 

15 

16 
17 

Hrs. 

Dec.  of 
Year. 

Angle. 

Min. 

Dec.  of 
Year. 

Angle. 

•721 

8«TCQ 

7  T7    22 

IQ 

18 

6*6 
324 

•ooiDy 
•88433 

o1  /    •* 
3l8    21 

•*•  y 

20 

19 

I 

O.OOOII 

2.'5 

I 

0.00000 

0.04 

325 

0.88706 

319    21 

21 

20 

2 

23 

4-9 

2 

0 

.08 

326 

.88980 

320   20 

22 

21 

3 

34 

7-4 

3 

I 

.12 

327 

•89254 

321    19 

23 

22 

4 

46 

9-9 

4 

I 

,l6 

328 
329 

•89528 
.89802 

322  18 
323  17 

24 
25 

23 
24 

5 

0.00057 

£.Q 

12.3 

5 

0.00001 

0.21 

68 

14.8 

I 

•25 

330 

0.90075 

324  16 

26 

25 

7 

80 

17.2 

7 

I 

•29 

33i 

.90349 

325  15 

27 

26 

8 

91 

197 

8 

2 

•33 

332 

.90623 

326  15 

28 

27 

9 

103 

22.2 

9 

2 

•37 

333 

.90897 

327  14 

29 

28 

334 

.91170 

328  13 

30 

29 

10 

0.00114 

24.6 

10 

0.00002 

0.41 

ii 

126 

27.1 

20 

4 

.82 

335 

0.91444 

329   12 

Dec.    i 

30 

12 

137 

29.6 

3° 

6 

1.23 

336 

.91718 

330    II 

2 

Dec.  i 

13 

148 

32.0 

40 

8 

»* 

1.64 

337 

.91992 

331  10 

3 

2 

14 

1  60 

34-5 

50 

10 

2.05 

338 

.92266 

332     9 

4 

3 

339 

•92539 

333    9 

5 

4 

15 

0.00171 

37-0 

60 

O.OOOII 

2.46 

340 

341 
342 
343 

0.92813 
.93087 
•9336i 
•93634 

334    8 
335     7 
336    6 
337    5 

6 

8 
9 

•i 

8 

16 

17 
18 

19 

183 
194 
205 
217 

39-4 
41.9 

44-4 
46.8 

344 

.93908 

338    4 

10 

9 

20 

0.00228 

49-3 

345 

0.94182 

339    3 

ii 

10 

21 

240 

5L7 

346 

347 

.94456 
•94730 

340      2 

341       2 

12 
J3 

ii 

12 

22 
23 

251 
262 

54.2 
56.7 

348 

•95003 

342       I 

14 

13 

24 

274 

59-  * 

349 

.95277 

343    ° 

15 

14 

350 

0-95551 

343  59 

16 

15 

SMITHSONIAN  TABLES 


2T5 


TABLE  75. 

HOURS,    MINUTES    AND    SECONDS    INTO    DECIMALS    OF  A    DAY. 


Hours 

Day. 

Win, 

Day. 

Min. 

Day. 

Sec. 

Day. 

Sec. 

Day. 

1 

0.041  667 

1 

o.ooo  694 

31 

0.021  528 

1 

O.OOO  OI  2 

31 

o.ooo  359 

2 

•083  333 

2 

.001  389 

32 

.022  222 

2 

.OOOO23 

32 

.000370  | 

3 

.125  ooo 

3 

.002  083 

33 

.022  917 

3 

.000035 

33 

.000382  I 

4 

.166667 

4 

.002  778 

34 

.023611 

4 

.000046 

34 

.000394  | 

5 

0.208  333 

5 

0.003  47  2 

35 

0.024  305 

5 

o.ooo  058 

35 

o.ooo  405  1 

6 

.250000 

6 

.004  167 

36 

.025  ooo 

6 

.000069 

36 

.000417 

7 

.291  667 

7 

.004  86  1 

37 

.025  694 

7 

.000081 

37 

.000428 

8 

•333  333 

8 

.005  556 

38 

.026  389 

8 

.000  093 

38 

.000440 

9 

.375000 

9 

.006  250 

39 

.027  083 

9 

.000  104 

39 

.000451 

10 

0.416  667 

10 

0.006  944 

40 

0.027  778 

10 

o.ooo  116 

40 

o.ooo  463 

ii 

•458  333 

ii 

.007  639 

4i 

.028  472 

ii 

.000  127 

4i 

.000  475 

12 

.500000 

12 

•008  333 

42 

.029  167 

12 

.000139 

42 

.000  486 

13 

.541  667 

13 

.009  028 

43 

.029  86  1 

J3 

.000  150 

43 

.000  498 

14 

•583  333 

14 

.009  722 

44 

•030  556 

14 

.000  162 

44 

.000  509 

15 

0.625  00° 

15 

0.010417 

45 

0.031  250 

15 

o.ooo  174 

45 

o.ooo  521 

16 

.666667 

16 

.Oil  III 

46 

.031  944 

16 

.000  185 

46 

.000  532 

17 

•708333 

17 

.011806 

47 

.032  639 

17 

.000  197 

47 

.000544 

18 

.750000 

18 

.012500 

48 

•033  333 

18 

.000  208 

48 

.000  556 

19 

.791  667 

19 

,013  194 

49 

.034  028 

19 

.OOO  2  2O 

49 

.000  567 

20 

0-833  333 

20 

0.013  889 

50 

0.034  722 

20 

o.ooo  231 

50 

o.ooo  579 

21 

.875000 

21 

.014  583 

5i 

•035  4J7 

21 

.000243 

5i 

.000  590 

22 

.916  667 

22 

.015  278 

52 

.036  1  1  1 

22 

.000255 

52 

.000  602 

23 

.958  333 

23 

.015  972 

53 

.036  806 

23 

.000  266 

53 

.000613 

24 

I.OOOOOO 

24 

.016  667 

54 

.037  500 

24 

.000278 

54 

.000  625 

25 

0.017  361 

55 

0.038  194 

25 

o.ooo  289 

55 

o.ooo  637 

26 

.018  056 

56 

.038  889 

26 

.000  301 

56 

.000  648 

27 

.018750 

57 

•039  583 

27 

.000313 

57 

.000660 

28 

.019  444 

58 

.040  278 

28 

.000324 

58 

.000671 

29 

.020  139 

59 

.040  972 

29 

.000  336 

59 

.000  683 

30 

O.O2O  833 

60 

0.041  667 

30 

o.ooo  347 

60 

.000694 

TABLE  76. 

DECIMALS    OF   A    DAY    INTO    HOURS,  MINUTES   AND    SECONDS. 


Hundredths  of  a  Day. 

Ten  Thousandths  of  a  Day. 

Millionths  of  a  Day. 

d. 

ll.         111.         S. 

d. 

min.    sec. 

d. 

sec. 

0.01 

14  24 

0.0001 

8.64 

0.000001 

0.09 

.02 

28    48 

2 

17.28 

2 

0.17 

.03 

43     12 

3 

25.92 

3 

0.26 

.04 

57    36 

4 

34.56 

4 

0-35 

0.05 

I       12         0. 

0.0005 

43.20 

0.000005 

0.43 

.06 

I       26      24 

6 

51.84 

6 

0.52 

.07 

I      40      48 

7 

I        0.48 

7 

O.6o 

.08 

i     55     12 

8 

I        9.12 

8 

0.69 

.09 

2      9    36 

9 

I      17.76 

9 

0.78 

0.10 

2      24         0 

0.0010 

I      26.40 

0.000010 

0.86 

.20 

4    48      o 

20 

2      52.80 

20 

1-73 

.30 

7     12      o 

30 

4     19.20 

30 

2.59 

.40 

9    36      o 

40 

5    45-60 

40 

3-46 

0.50 

12         0         0 

0.0050 

7     12.00 

0.000050 

4-32 

.60 

14    24      o 

60 

8    38.40 

60 

5-18 

.70 

16     48      o 

70 

10      4.80 

70 

6.05 

.80 

19      12         0 

80 

ii     31.20 

80 

6.91 

•90 

21      36         0 

90 

12      57.60 

90 

7-78 

SMITHSONIAN  TABLES. 


216 


TABLE   77. 
MINUTES    AND    SECONDS    INTO    DECIMALS    OF    AN    HOUR. 


Min. 

Decimals  of 
an  hour. 

Min. 

Decimals  of 
an  hour. 

Sec. 

Decimals  of 
an  hour. 

Sec. 

Decimals  of 
an  hour. 

, 

0.016  667 

31 

0.516667 

1 

o.ooo  278 

31 

0.00861  1 

2 

•033  333 

32 

•533  333 

2 

.000556 

32 

.008889 

3 

•  .050000 

33 

.550000 

3 

.000  833 

33 

.009  167 

4 

.066667 

34 

.566667 

4 

.001  III 

34 

.009444 

5 

0.083  333 

35 

0.583  333 

5 

o.ooi  389 

35 

0.009  722 

6 

.100  ooo 

36 

.600000 

6 

.001  667 

36 

.010  ooo 

7 

.116  667 

37 

.616  667 

7 

.001  944 

37 

.010  278 

8 

•133333 

38 

•633  333 

8 

.002  222 

38 

.010  556 

9 

.150000 

39 

.650000 

9 

.002500 

39 

.010  833 

10 

o.i  66  667 

40 

0.666  667 

10 

0.002  778 

40 

O.OII  III 

ii 

•183  333 

41 

•683  333 

ii 

.003  056 

4i 

•011389 

12 

.200000 

42 

.700000 

12 

•003  333 

42 

.on  667 

13 

.216667 

43 

.716  667 

13 

.003  611 

43 

.on  944 

14 

•233  333 

44 

•733  333 

14 

.003  889 

44 

.012  222 

15 

0.250000 

45 

0.750  ooo 

15 

0.004  167 

45 

0.012  500 

16 

.266  667 

46 

.766  667 

16 

.004444 

46 

.012  778 

17 

•283  333 

47 

•783  333 

17 

.004  722 

47 

.013  056 

18 

.300000 

48 

.800000 

18 

.005  ooo 

48 

•013  333 

19 

.316  667 

49 

.816  667 

19 

.005  278 

49 

.013  6n 

20 

0-333  333 

50 

0.833  333 

20 

0.005  556 

50 

0.013  889 

21 

.350000 

5i 

.850000 

21 

•005  833 

5i 

.014  167 

22 

.366  667 

52 

.866  667 

22 

.006  III 

52 

.014  444 

23 

•383  333 

53 

•883  333 

23 

.006  389 

53 

.014  722 

24 

.400000 

54 

.900000 

24 

.006667 

54 

.015  ooo 

25 

0.416  667 

55 

0.916  667 

25 

0.006  944 

55 

0.015  278 

26 

•433  333 

56 

•933  333 

26 

.007  222 

56 

•015  556 

27 

.450000 

57 

.950000 

27 

.007500 

57 

•015  833 

28 

.466  667 

58 

.966  667 

28 

.007  778 

58 

.016  in 

29 

•483  333 

59 

•983  333 

29 

.008  056 

59 

.016  389 

30 

0.500000 

60 

I.OOOOOO 

30 

0.008  333 

60 

0.016  667 

TABLE   78. 


LOCAL    MEAN    TIME    AT    APPARENT    NOON 


Day  of 
Month. 

JAN. 

FEB. 

MAR. 

APR. 

MAY. 

JUNE. 

h.  m. 

h.  m. 

h.  m. 

h.   m. 

h.  m. 

h.  m. 

I 

12   4 

12  14 

12  12 

12   4 

II   57 

II  58 

8 

12   7 

12   14 

12   II 

12    2 

II   56 

ii  59 

16 

12   10 

12   14 

12   9 

12    0 

II  56 

12    0 

24 

12   12 

12   13 

12   6 

II   58 

ii  57 

12    2 

JUI/Y. 

AUG. 

SEPT. 

OCT. 

NOV. 

me. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

h.  m. 

i 

12   3 

12   6 

12    0 

II  50 

ii  44 

II  50 

8 

12   5 

12   5 

II  58 

II  48 

ii  44 

ii  53 

16 

12    6 

12   4 

ii  55 

II  46 

ii  45 

ii  56 

24 

12    6 

12    2 

ii  52 

II  45 

ii  47 

12    0 

SMITHSONIAN  TABLE*. 


2I7 


TABLE   79. 

SIDEREAL   TIME    INTO    MEAN 
SOLAR    TIME. 

The    tabular  values   are  to  be  subtracted 
from  a  sidereal  time  interval. 


TABLE   so. 

MEAN     SOLAR    TIME     INTO 
SIDEREAL   TIME. 

The  tabular  values  are  to  be  added  to  a 
mean  solar  time  interval. 


Hrs. 

Reduction 
to 
Mean  lime. 

Min. 

Reduc- 
tion 
t)  Mean 
Time. 

Min. 

Reduc- 
tion 
to  wean 
Time. 

Hrs. 

Reduction  to 
Sidereal 
Time, 

Min. 

Reduc- 
tion to 
Sidereal 
Time. 

Min. 

Reduc- 
tion to 
Sidereal 
Time. 

h. 

m. 

s. 

m. 

s. 

m. 

s. 

h. 

m. 

s. 

111. 

s. 

m. 

s. 

| 

O 

9.83 

| 

O. 

16 

31 

5.08 

1 

O 

9.86 

| 

0.16 

31 

5-09 

2 

O 

19.66 

2 

0.33 

32 

5-24 

2 

O 

19.71 

2 

0-33 

32 

5-26 

3 

0 

29.49 

3 

0.49 

33 

5-41 

3 

O 

29-57 

3 

0.49 

33 

5.42 

4 

0 

39-32 

4 

0.66 

34 

5-57 

4 

O 

39-43 

4 

0.66 

34 

5-59 

5 

0 

49-  15 

5 

0.82 

35 

5.73 

5 

o   49.28 

5 

0.82 

35 

5-75 

6 

0 

58.98 

6 

0.98 

36 

5-90 

6 

o  59-  T4 

6 

0.99 

36 

5-91 

7 

I 

8.81 

7 

i. 

15 

37 

6.06 

7 

9.00 

7 

.15 

37 

6.08 

8 

I 

18.64 

8 

.31 

38 

6.23 

8 

18.85 

8 

51 

38 

6.24 

9 

I 

28.47 

9 

•47 

39 

6-39 

9 

28.71 

9 

48 

39 

6.41 

10 

I 

38-30 

10 

.64 

40 

6-55 

10 

38.57 

10 

.64 

40 

6-57 

ii 

I 

48.13 

ii 

.80 

41 

6.72 

ii 

48.42 

1  1 

i.Sr 

41 

6-74 

12 

I 

57.96 

12 

•97 

42 

6.88 

12 

58.28 

12 

•97 

42 

6.90 

13 

2 

7.78 

13 

2. 

13 

43 

7-05 

13 

2 

8.13 

4 

2.14 

43 

7.06 

14 

2 

17.61 

14 

2.29 

44 

7.21 

2 

17.99 

14 

2.30 

44 

7-23 

15 

2 

27-44 

15 

2.46 

45 

7-37 

15 

2 

27-85 

15 

2.46 

45 

7-39 

16 

2 

37.27 

16 

2.62 

46 

7-54 

16 

2    37-70 

16 

2.63 

46 

7.56 

17 

2 

47.10 

17 

2-79 

47 

7.70 

17 

2    < 

47-56 

17 

2-79 

47 

7.72 

18 

2    56.93 

18 

2-95 

48 

7.86 

18 

2    57.42 

18 

2.C 

)6 

48 

7-89 

19 

3 

6.76 

J9 

3-n 

49 

8.03 

19 

3 

7-27 

J9 

3.12 

49 

8.05 

20 

3 

16.59 

20 

3-28 

50 

8.19 

20 

3 

17.13 

20 

3-: 

,9 

50 

8.21 

21 

3 

26.42 

21 

3-44 

51 

8.36 

21 

3   26.99 

21 

3-45 

51 

8.38 

22 

3  36.25 

22 

3-6o 

52 

8.52 

22 

3   36.84 

22 

3-6i 

52 

8.54 

23 

3  46-08 

23 

3-77 

53 

8.68 

23 

3   46.70 

23 

3-78 

53 

8.71 

24 

3   55.91 

24 

3-93 

54 

8.85 

24 

3   56.56 

24 

3-94 

54 

8.87 

25 

4.10 

55 

9.01 

25 

4.1 

i 

55 

9.04 

26 

4.26 

56 

9.17 

26 

4.27 

56 

9.20 

27 

4.42 

57 

9-34 

27 

4-43 

57 

9-36 

28 

4-59 

58 

9-50 

28 

4.60 

58 

9.53 

29 

4-75 

59 

9.67 

29 

4.76 

59 

9.69 

30 

4-92 

60 

9-83 

30 

4-93 

60 

9.86 

Reduction  for  Seconds—  sidereal  or 

mean  solar. 

The 

tabular  values  are  to  be  {  ^i^^o^a  ^mean 

1    V  time  interval. 

Sidereal 
Or 

0 

, 

2 

3 

4             5 

6 

7 

8 

9 

Mean  Time. 

s. 

s. 

s. 

s. 

s. 

s.              s. 

s. 

s. 

s. 

s. 

0 

o.oo 

0.00 

O.OI 

O.OI 

O.OI           O.OI 

0.02 

O.O2 

0.02 

0.03 

10 

.03 

•03 

•°3 

.04 

.04          .04 

.04 

•05 

•05 

.05 

20 

.06 

.06 

.06 

.06 

.07       .07 

.07 

.07 

.08 

.08 

30 

.08 

.09 

.09 

.09 

.09          .10 

.IO 

.10 

.10 

.11 

40 

.11 

.11 

.12 

.12 

.12              .12 

•13 

•13 

.13 

.13 

50 

0.14 

0.14 

O.I4 

0.15 

0.15           0.15 

0.15 

0.16 

0.16 

0.16 

SMITHSONIAN  TABLES. 


218 


MISCELLANEOUS  TABLES. 

WEIGHT  IN  GRAMMES  OF  A  CUBIC  CENTIMETRE  OF  AIR  : 

English  measures — Temperature  term TABLE    81 

Humidity  term ;  auxiliary  table      .     .  TABLE    82 

Humidity  and  pressure  terms,  combined  TABLE    83 

Metric  measures — Temperature  term TABLE    84 

Humidity  term ;  auxiliary  table         .     .  TABLE    85 

Humidity  and  pressure  terms,  combined  TABLE    86 

Conversion  of  avoirdupois  pounds  and  ounces  into  kilogrammes  TABLE    87 

Conversion  of  kilogrammes  into  avoirdupois  pounds  and  ounces  TABLE    83 

Conversion  of  grains  into  grammes TABLE    89 

Conversion  of  grammes  into  grains TABLE    90 

Conversion  of  units  of  magnetic  intensity TABLE    91 

Quantity  of  water  corresponding  to  given  depths  of  rainfall     .  TABLE    92 

Atmospheric  water  vapor  lines  in  the  visible  spectrum    .     .     .  TABLE    93 

Absorption  by  atmospheric  water  vapor  in  the  infra-red  spec- 
trum      TABLE  93^ 

Division  by  28  of  numbers  from  28  to  867972 TABLE    94 

Division  by  29  of  numbers  from  29  to  898971 TABLE    95 

Division  by  31  of  numbers  from  31  to  960969 TABLE    96 

Natural  sines  and  cosines .     »     .     .  TABLE    97 

Natural  tangents  and  cotangents    .     .     .     .:  -  v   .     .     .     ...  TABLE    98 

Logarithms  of  numbers     .     .     .  :  .'„     .;    •     .,  .     ....     .  TABLE    99 

Bigelow's  standard  system  of  symbols  and  equations       .     .     .  TABLE  100 

List  of  meteorological  stations l-  .''.-.    \     .     .  TABLE  101 

International  meteorological  symbols .     .  TABLE  102 

Beaufort's  notation  for  use  at  sea .     .     .  TABLE  103 

Acceleration  of  apparent  gravity    .     .     .     .     .     .     .     ...  TABLE  104 

219 


TABLE  81. 

WEIGHT   IN   GRAMMES  OF  ONE   CUBIC  CENTIMETRE   OF  AIR. 


Temperature  term  :  df= 


0.00129305 


i  +  0.0020389  (t  — 


Fahrenheit  temperature?. 


I  cubic  centimetre  of  dry  air  at  the  temperature  32°  F.  and  pressure  760  mm.,  under  the 
standard  value  of  gravity  at  latitude  45°  and  sea-level,  weighs  0.00129305  gramme. 


Temper- 
ature. 

* 

Log  8{ 

Temper- 
ature. 

* 

LogSt 

Temper- 
ature. 

* 

LogSt 

F. 

o.oo 

—  10 

F. 

o.oo 

—  10 

F. 

0.00 

—  IO 

-45° 

15339 

7-18579 

30° 

12983 

7.11339 

75° 

11888 

7.07512 

-40 

15155 

.18056 

31 

12957 

.11250 

76 

11866 

.07430 

~35 

14977 

•I754I 

32 

12931 

.11162 

77 

11844 

.07349 

-3° 

14802 

.17031 

33 

12904 

.11073 

78 

11822 

.07268 

-25 

14631 

.16527 

34 

12878 

.10985 

79 

11800 

.07187 

0.00 

o.oo 

o.oo 

-20 

14464 

7.  16029 

35 

12852 

7.10897 

80 

11778 

7.07107 

-18 

14398 

•15831 

36 

12826 

.10809 

81 

11756 

.07026 

-16 

14333 

.15634 

37 

12800 

.10721 

82 

11734 

.06946 

-14 

14269 

.15439 

38 

12774 

.10633 

83 

11713 

.06865 

—  12 

14205 

.15244 

39 

12749 

.  10546 

84 

11691 

.06785 

o.oo 

0.00 

0.00 

-10 

14142 

7-15050 

40 

12723 

7.10459 

85 

11670 

7.06705 

-  8 

14079 

.14856 

41 

12698 

.10372 

86 

11648 

.06625 

-  6 

14017 

.14664 

42 

12672 

.  10285 

87 

11627 

.06546 

-  4 

13955 

.14472 

43 

12647 

.10198 

88 

11605 

.06466 

—  2 

13894 

.  14282 

44 

12622 

.IOII2 

89 

11584 

.06387 

o.oo 

o.oo 

0.00 

+  o 

13833 

7.14092 

45 

12597 

7.10025 

90 

11563 

7.06307 

I 

13803 

.13997 

46 

12572 

.09939 

9i 

11542 

.06228 

2 

13773 

.13903 

47 

12547 

•09853 

92 

11521 

.06149 

3 

13743 

.13808 

48 

12522 

.09767 

93 

11500 

.06070 

4 

13713 

.13714 

49 

12497 

.09682 

94 

11479 

.05992 

0.00 

o.oo 

o.oo 

5 

13684 

7.13621 

50 

12473 

7.09596 

95 

11458 

7.059!3 

6 

13654 

.13527 

5i 

12448 

.09511 

96 

11438 

•05835 

7 

13625 

•13434 

52 

12424 

.09426 

97 

11418 

.05757 

8 

13596 

.13340 

53 

12400 

.09341 

98 

11397 

•05678 

9 

13567 

.13247 

54 

12375 

.09256 

99 

11376 

.05600 

0.00 

o.oo 

o.oo 

10 

13538 

7.I3I55 

55 

J235i 

7.09171 

100 

11356 

7-05523 

ii 

13509 

.13062 

56 

12327 

.09087 

101 

11336 

•05445 

12 

13480 

.12970 

57 

12303 

.09002 

102 

11315 

•05367 

13 

13452 

.12877 

58 

12280 

.08918 

103 

11295 

.05290 

14 

13423 

.12785 

59 

12256 

.08834 

104 

11275 

.05213 

o.oo 

0.00 

0.00 

15 

13395 

7.12694 

60 

12232 

7.08750 

105 

11255 

7.05136 

16 

13367 

.12602 

61 

12209 

.08667 

106 

11235 

.05058 

17 

13338 

.12510 

62 

12185 

.08583 

107 

11215 

.04982 

18 

13310 

.12419 

63 

12162 

.08500 

108 

11196 

.04905 

19 

13282 

.12328 

64 

12138 

.08416 

109 

11176 

.04828 

0.00 

0.00 

0.00 

20 

13255 

7.12237 

65 

12115 

7.08334 

110 

11156 

7.04752 

21 

13227 

.12147 

66 

12092 

.08251 

112 

11117 

•04599 

22 

13200 

.12056 

67 

12069 

.08168 

114 

11078 

.04447 

23 

13172 

.11966 

68 

12046 

.08085 

116 

11040 

.04296 

24 

i3T45 

.11876 

69 

12023 

.08003 

118 

IIOOI 

.04145 

o.oo 

o.oo 

o.oo 

25 

13118 

7.11786 

70 

I200I 

7.07921 

120 

10963 

7-03994 

26 

13091 

.11696 

7i 

11978 

.07839 

125 

10870 

.03621 

27 

13064 

.11606 

72 

11956 

.07757 

130 

10776 

.03248 

28 

13037 

•11517 

73 

11933 

.07675 

135 

10686 

.02883 

29 

13010 

.11428 

74 

11910 

.07593 

140 

10597 

.02518 

SMITHSONIAN  TABLES. 


22O 


TABLE  82. 
WEIGHT   IN   GRAMMES  OF  ONE   CUBIC  CENTIMETRE  OF  AIR. 

Humidity  term  :  Values  of  0.3781?.     Auxiliary  to  Table  83. 

e=.  Vapor  pressure  iu  inches.  (Landolt  and  Bornstein,  7905.) 

Temperature  by  normal  hydrogen  thermometer. 


Dew- 
Point. 

£. 

Vapor 
Pressure. 

(7<er.) 

0.378^. 

Dew- 
Point. 

e. 
Vapor 
Press- 
ure. 

* 

0.378^. 

Dew- 
Point. 

e. 

Vapor 
Press- 
ure. 

(Water.} 

0.378*. 

Dew- 
Point. 

e. 

Vapor 
Press- 
ure. 

(Water) 

0.378^. 

F- 

Inch. 

Inch. 

F. 

Inch. 

Inch. 

F. 

Inch. 

Inch. 

F. 

Inches. 

Indies. 

—  40° 

O.OO^r 

O.O02 

5° 

0.0495 

0.019 

50° 

0.3614 

0.137 

95° 

.648 

0.623 

9 

.0044 

.002 

6 

.0520 

.020 

51 

•3750 

.142 

96 

.700 

.642 

38 

.0046 

.C02 

7 

•0547 

.021 

52 

.3890 

.147 

97 

.752 

.662 

37 

.0048 

.002 

8 

•0575 

.022 

53 

.4036 

•153 

98 

.806 

.683 

36 

.0052 

.002 

9 

.0606 

.023 

54 

.4186 

.158 

99 

.862 

.704 

—  35 

0.0054 

0.002 

10 

0.0637 

0.024 

55 

0.4341 

0.164 

100 

920 

0.726 

34 

.0057 

.002 

ii 

.0670 

.025 

56 

.4501 

.170 

101 

.978 

•748 

33 

.0061 

.002 

12 

.0704 

.027 

57 

.4665 

.176 

102 

2.039 

.771 

32 

.0064 

.002 

13 

•0739 

.028 

58 

.4836 

.183 

I03 

2.100 

•794 

3i 

.0068 

.003 

H 

.0777 

.029 

59 

•  5011 

.189 

IO4 

2.164 

.818 

-30 

0.0072 

0.003 

15 

0.0816 

0.031 

60 

0.5192 

0.196 

105 

2  229 

0.842 

29 

.0077 

.003 

1  6 

.0856 

.032 

61 

.5378 

.203 

106 

2.296 

.868 

28 

.0081 

.003 

17 

.0898 

•°34 

62 

•5571 

.211 

107 

2.365 

.894 

27 

.0086 

.003 

18 

.0941 

.036 

63 

•5769 

.218 

108 

2-435 

.920 

26 

.0092 

.003 

19 

.0989 

.038 

64 

•5973 

.226 

109 

2.507 

.948 

—  25 

0.0097 

O.O04 

20 

o.  1036 

0.039 

65 

0.6181 

0.234 

110 

2  582 

0.976 

-4 

.0103 

.004 

21 

.1086 

.041 

66 

•6399 

.242 

in 

2.658 

005 

23 

.0109 

.OO4 

22 

•U39 

•043 

67 

.6623 

.250 

112 

2-735 

033 

22 

.0115 

.004 

23 

.1194 

•045 

68 

.6853 

•259 

H3 

2.8IS 

064 

21 

.0122 

.005 

24 

.1252 

.047 

69 

.7090 

.268 

114 

2.897 

•095 

—  20 

0.0129 

0.005 

25 

0.1311 

0.050 

70 

0-7337 

0.277 

115 

2  981 

.127 

19 

.0136 

.005 

26 

•1373 

.052 

7i 

.7583 

.287 

116 

3.067 

-159 

18 

.0144 

.005 

27 

.1438 

•054 

72 

•7845 

.297 

117 

3-155 

.192 

17 

•0153 

.006 

28 

.1506 

•057 

73 

.8113 

.307 

118 

3-245 

227 

16 

.0162 

.OO6 

29 

•1575 

.060 

74 

.8388 

.317 

119 

3-337 

.262 

-15 

O.OI7I 

0.006 

30 

0.1648 

0.062 

75 

0.8673 

0.328 

120 

3432 

.297 

H 

.Ol8l 

.007 

3i 

.1724 

.065 

76 

.8967 

•339 

121 

3-530 

334 

13 

.019: 

.007 

32 

.1803 

.068 

77 

.9270 

•350 

122 

3.629 

•372 

12 

.O2OI 

.008 

33 

.1877 

.071 

78 

.9582 

.362 

123 

3  7oi 

.410 

11 

.0213 

.008 

34 

•1953 

.074 

79 

.9902 

•  374 

124 

3835 

-449 

—  10 

O.0224 

0.008 

35 

0.2032 

0.077 

80 

.0232 

0.387 

125 

3-941 

•49° 

9 

.0237 

.OO9 

36 

.2115 

.080 

Si 

.0572 

.400 

126 

4.051 

•531 

8 

.0250 

.OO9 

37 

.2199 

.083 

82 

.0922 

.413 

127 

4  163 

573 

7 

.0263 

.OIO 

38 

.2287 

.c86 

83 

.1282 

.426 

128 

4.277 

.617 

6 

] 

.0278 

.Oil 

39 

.2378 

.090 

84 

.1651 

.440 

129 

4-394 

.661 

O.O294 

O.OII 

40 

0.2473 

0.094 

85 

.2032 

0-455 

130 

4-5'4 

.706 

4 

.0310 

.012 

4i 

.2570 

.097 

86 

.2423 

.470 

131 

4.637 

•753 

3 

.0328 

.012 

42 

.2671 

.101 

87 

.2826 

.485 

132 

4763 

.801 

2 

•0345 

.013 

43 

.2776 

.105 

88 

•3239 

.500 

133 

4.891 

849 

I 

.0364 

.014 

44 

.2884 

.109 

89 

•3665 

.516 

134 

5.022 

.898 

0 

0.0384 

0.015 

45 

0.2996 

0.113 

90 

.4102 

o.533 

135 

5-157 

i  949 

4-    i 

.0404 

.015 

46 

.3111 

.118 

91 

•4552 

•550 

136 

5  294 

2  OOI 

2 

.0426 

.016 

47 

•3231 

.122 

92 

5014 

•567 

137 

5-434 

2.054 

3 

..448 

.017 

48 

•3354 

.127 

93 

1.5489 

•585 

138 

5578 

2  108 

4 

.0471 

.018 

49 

.3482 

.132 

94 

15976 

.604 

139 

5.726 

2.165 

-f    5 

0.0495 

O.OI9 

50 

.3614 

0.137 

95 

1.6477 

0.623 

140 

5.874 

2.221 

*  Values  for  temperatures  less  than  32°  F.  refer  to  vapor  over  ice. 
221 


TABLE   83. 
WEIGHT    IN    GRAMMES    OF    ONE    CUBIC    CENTIMETRE    OF    AIR. 


Humidity  and  pressure  terms  combined  :  —  = 


29.921  29.921 

b  =  Barometric  pressure  in  inches  ;  e  —  Vapor  pressure  in  inches. 


h. 

h 

Loa   h 

h. 

h 

h 

h. 

h 

h 

29.921 

Log 

29.921 

29.291 

"  29.921 

29.921 

29.921 

Inch's. 

—  10 

Inches. 

—  10 

Inches. 

—  10 

10.0 

0.3342 

9.52402 

15.0 

0.5013 

9.70012 

20.0 

0.6684 

9.82505 

10.  1 

•3376 

•52835 

15-1 

.5047 

.70300 

20.1 

.6718 

.82722 

10.2 

.3409 

.53262 

15-2 

.5080 

.70587 

20.2 

.6751 

.82938 

10.3 

•3442 

.53686 

J5-3 

.5113 

.70871 

20.3 

.6784 

-83152 

10.4 

.3476 

.54106 

15-4 

•5147 

-7II54 

20.4 

.6818 

.83365 

10.5 

0-3509 

9-54521 

15.5 

0.5180 

9-7I435 

20.5 

0.6851 

9.83578 

10.6 

•3543 

-54933 

15-6 

.5214 

.71715 

20.6 

.6885 

.83789 

10.7 

.3576 

-55341 

15-7 

.5247 

.71992 

20.7 

.6918 

.83999 

10.8 

.3609 

•55745 

15-8 

.5281 

.72268 

20.8 

.6952 

.84209 

10.9 

•3643 

-56145 

15-9 

.5314 

.72542 

20.9 

-6985 

.84417 

11.0 

0.3676 

9-56542 

16.0 

0-5347 

9.72814 

21.0 

0.7018 

9.84624 

ii.  i 

.3710 

.56935 

16.1 

.5381 

.73085 

21.  1 

.7052 

.84831 

II.  2 

•3743 

-57324. 

16.2 

.5414 

•73354 

21.2 

.7085 

.85036 

"•3 

•3777 

•57710 

16.3 

.5448 

.73621 

21-3 

.7119 

.85240 

11.4 

.3810 

.58093 

16.4 

.5481 

.73887 

21.4 

.7152 

.85444 

11.5 

0.3843 

9.58472 

16.5 

0.5515 

9-74I5I 

21.5 

0.7186 

9.85646 

11.6 

.3877 

.58848 

16.6 

-5548 

.74413 

21.6 

.7219 

.85848 

11.7 

.3910 

.59221 

16.7 

-558I 

.74674 

21.7 

.7252 

.86048 

11.8 

•3944 

•59591 

16.8 

•5615 

•74933 

21.8 

.7286 

.86248 

11.9 

•3977 

•59957 

16.9 

.5648 

•75191 

21.9 

.7319 

.86447 

12.0 

0.4011 

0.60321 

17.0 

0.5682 

9-75447 

22.0 

0-7353 

9.86645 

12.  1 

.4044 

'.60681 

17.1 

.5715 

.75702 

22.1 

-7386 

.86842 

12.2 

.4077 

.61038 

17.2 

•5748 

•75955 

22.2 

.7420 

.87038 

12.3 

.4111 

.61393 

17.3 

.5782 

.76207 

22.3 

-7453 

-87233 

12.4 

.4144 

.61745 

17.4 

.5815 

•76457 

22.4 

.7486 

•87427 

12.5 

0.4178 

9.62093 

17.5 

0.5849 

9.76706 

22.5 

0.7520 

9.87621 

12.6 

.4211 

.62439 

17.6 

.5882 

.76954 

22.6 

•7553 

.87813 

12.7 

.4244 

.62782 

17.7 

.5916 

.77200 

22.7 

.7587 

.88005 

12.8 

.4278 

.63123 

17.8 

•5949 

•77444 

22.8 

.7620 

.88196 

12.9 

•4311 

•63461 

17.9 

.5982 

.77687 

22.9 

.7653 

.88386 

13.0 

0.4345 

9-63797 

18.0 

0.6016 

9.77930 

23.0 

0.7687 

9-88575 

I3-I 

.4378 

.64130 

18.1 

.6049 

.78170 

23.1 

.7720 

.88764 

13.2 

.4412 

.64460 

18.2 

.6083 

.78410 

23-2 

•7754 

.88951 

13-3 

•4445 

.64788 

18.3 

.6116 

.78648 

23-3 

.7787 

.89138 

13-4 

.4478 

.65113 

18.4 

.6149 

.78884 

23-4 

.7821 

.89324 

13.5 

0.4512 

9.65436 

18.5 

0.6183 

9.79120 

23.5 

0.7854 

9.89509 

13-6 

•4545 

.65756 

18.6 

.6216 

•79354 

23.6 

.7887 

.89693 

13-7 

•4579 

.66074 

18.7 

.6250 

•79587 

23-7 

.7921 

.89877 

13-8 

.4612 

.66390 

18.8 

.6283 

.79818 

23-8 

-7954 

.90060 

13-9 

.4646 

.66704 

18.9 

.6317 

.80049 

23-9 

.7988 

.90242 

14.0 

0.4679 

9-67015 

19.0 

0.6350 

9.80278 

24.0 

0.8021 

9.90424 

14.1 

.4712 

.67324 

19.1 

•6383 

.80506 

24.1 

.8054 

.90604 

14.2 

.4746 

.67631 

19.2 

.6417 

•80733 

24.2 

.8088 

.90784 

14.3 

•4779 

•67936 

19.3 

.6450 

.80958 

24-3 

.8121 

.90963 

14.4 

.4813 

•68239 

19.4 

.6484 

.81183 

24.4 

-8i55 

.91141 

14.5 

0.4846 

9.68539 

19.5 

0.6517  !  9.81406 

24.5 

0.8188 

9.91319 

14.6 

.4879 

.68837 

19.6 

.6551    .81628 

24.6 

.8222 

.91496 

14.7 

•49T3 

.69134 

19.7 

-6584 

.81849 

24-7 

.8255 

.91672 

14.8 

.4946 

.69429 

19.8 

.6617 

.82069 

24.8 

.8289 

.91848 

14.9 

.4980 

.69721 

19.9 

.6651 

.82288 

24.9 

.8322 

.92022 

SMITHSONIAN  TABLES. 


222 


TABLE  83. 

WEIGHT  IN  GRAMMES  OF  ONE  CUBIC  CENTIMETRE  OF  AIR. 

Humidity  and  pressure  terms  combined  :  —  = = °'37  e  m 

b==  Barometric  pressure  in  inches  ;  e==  Vapor  pressure  in  inches. 


h. 

h 

Loq       h 

h. 

h 

Loa      h 

h. 

h 

1  nn         h 

29.921 

29.921 

29.921 

29.  92  1 

29.921 

LOQ 

29.921 

Inches. 

—  IO 

Inches. 

—  10 

Inches. 

—  IO 

25.00 

0.8355 

9.92196 

27.25 

0.9107 

9.95939 

29.50 

0.9859 

9-99385 

25-05 

.8372 

.92283 

27.30 

.9124 

.96019 

29.55 

.9876 

.99458 

25.10 

.8389 

.92370 

27-35 

.9141 

.96008 

29.60 

.9893 

•99532 

25-15 

.8405 

.92456 

27.40 

•9157 

.96177 

29.65 

•9909 

.99605 

25.20 

.8422 

.92542 

27-45 

.9174 

.96256 

29.70 

.9926 

.99678 

25.25 

0.8439 

9.92628 

27.50 

0.9191 

9.96336 

29.75 

0-9943 

9.99751 

25-30 

.8456 

.92714 

27-55 

.9208 

.96414 

29.80 

.9960 

.99824 

25-35 

.8472 

.92800 

27.60 

.9224 

.96493 

29.85 

•9976 

.99897 

25.40 

.8489 

.92886 

27.65 

.9241 

.96572 

29.90 

•9993 

.99970 

25-45 

.8506 

.92971 

27.70 

.9258 

.96650 

29-95 

1.  0010 

0.00042 

25.50 

0.8522 

9.93056 

27.75 

0.9274 

9.96728 

30.00 

1.0026 

0.00115 

25.55 

.8539 

.93141 

27.80 

.9291 

.96807 

30.05 

1.0043 

.00187 

25.60 

.8556 

.93226 

27-85 

.9308 

.96885 

30.10 

1.  0060 

.00259 

25.65 

.8573 

.93311 

27.90 

•9325 

.96963 

30.15 

1.0076 

.00331 

25.70 

.8589 

.93396 

27-95 

•9341 

.97040 

30.20 

1.0093 

.00403 

25.75 

0.8606 

9.93480 

28.00 

0.9358 

9.97118 

30.25 

I.  OIIO 

0.00475 

25.80 

.8623 

•93564 

28.05 

•9375 

•97195 

30.3° 

1.0127 

.00547 

25.85 

.8639 

•93648 

28.10 

•9391 

.97273 

30.35 

1.0143 

.00618 

25.90 

.8656 

.93732 

28.15 

.9408 

•97350 

30.40 

1.  0160 

.00690 

25.95 

•8673 

.93816 

28.20 

.9425 

.97427 

30.45 

1.0177 

.00761 

26.00 

0.8690 

9.93900 

28.25 

0.9441 

9.97504 

30.50 

1.0193 

0.00832 

26.05 

.8706 

.93983 

28.30 

.9458 

.9758i 

30.55 

1.  0210 

.00903 

26.10 

.8723 

.94066 

28.35 

•9475 

.97657 

30.60 

I.O227 

.00975 

26.15 

.8740 

.94149 

28.40 

•9492 

•97734 

30.65 

I.O244 

.01045 

26.20 

.8756 

.94233 

28.45 

.9508 

.97810 

30.70 

I.O26O 

.01116 

26.25 

0.8773 

9.94315 

28.50 

0.9525 

9.97887 

30.75 

1.0277 

0.01187 

26.30 

.8790 

.94398 

28.55 

•9542 

.97963 

30.80 

1.0294 

.01257 

26.35 

.8806 

.94480 

28.60 

.9558 

•98039 

30.85 

I.03IO 

.01328 

26.40 

.8823 

.94563 

28.65 

•9575 

.98115 

30.90 

1.0327 

.01398 

26.45 

.8840 

.94645 

28.70 

•9592 

.98191 

30.95 

1.0344 

.01468 

26.50 

0.8857 

9.94727 

28.75 

0.9609 

9.98266 

31.00 

I.036I 

0.01539 

26.55 

.8873 

.94809 

28.80 

.9625 

.98342 

3I'°5 

1.0377 

.01608 

26.60 

.8890 

.94891 

28.85 

.9642 

.98417 

31.10 

1.0394 

.01678 

26.65 

.8907 

.94972 

28.90 

.9659 

.98492 

3LI5 

I.04II 

.01748 

26.70 

.8924 

.95054 

28.95 

.9675 

.98567 

31.20 

1.0427 

.01818 

26.75 

0.8940 

9.95135 

29.00 

0.9692 

9.98642 

31.25 

1.0444 

0.01887 

26.80 

.8957 

.95216 

29.05 

.9709 

.98717 

3L30 

I.O46l 

.01957 

26.85 

.8974 

.95297 

29.10 

.9726 

.98792 

31-35 

1.0478 

.02026 

26.90 

.8990 

.95378 

29-15 

.9742 

.98866 

31.40 

1.0494 

.02095 

26.95 

.9007 

•95458 

29.20 

•9759 

.98941 

3L45 

I.05II 

.02164 

27.00 

0.9024 

9.95539 

29.25 

0.9776 

9.99015 

31.50 

1.0528 

0.02233 

27.05 

.9040 

.95619 

29.30 

.9792 

.99089 

31-55 

1.0544 

.02302 

27.10 

.9057 

.95699 

29.35 

.9809 

.99163 

31.60 

1.0561 

.02371 

27-15 

•9°74 

.95779 

29.40 

.9826 

.99237 

31.65 

1.0578 

.02439 

27.20 

.9091 

.95859 

29-45 

.9843 

.993H 

31.70 

1.0594 

.02508 

SMITHSONIAN  TABLES. 


223 


TABLE  84. 

WEIGHT    IN    GRAMMES    OF    ONE    CUBIC    CENTIMETRE    OF    AIR. 


Temperature  term  : 


r  ;.  '    , 

_j_  0.003670  t 


Centigrade  temperature. 


i  cubic  centimetre  of  dry  air  at  the  temperature  o°  C,  and  pressure  760  mm.,  under  the 
standard  value  of  gravity  at  latitude  45°  and  sea-level,  weighs  0.00129305  gramme. 


t. 

^t,  760 

Log  8t>  76o 

t. 

\  760 

L?0  Sti  ?6o 

t. 

St,  760 

Log  \  76o 

c. 

0.00 

—  IO 

c. 

o.oo 

—  10 

c. 

0.00 

—  IO 

-34° 

14774 

7.16950 

-  4?o 

13148 

7.11885 

I8?0 

12129 

7.08383 

—  33 

14712 

.16768 

—  4.0 

13123 

.11804 

18.5 

12108 

8309 

-32 

14651 

.16587 

—  3-5 

13099 

.11723 

19.0 

12088 

8234 

-3i 

1459° 

.16407 

-  3-° 

13074 

.11642 

19-5 

12067 

8160 

o.oo 

0.00 

o.oo 

-30 

14530 

7.16227 

-  2.5 

13050 

7.11562 

20.0 

12046 

7.08085 

-29 

14471 

.16049 

—  2.0 

13026 

.11481 

20.5 

12026 

Son 

-28 

14412 

.15871 

-  1-5 

13002 

.11401 

21.  0 

12005 

7937 

-27 

14353 

.15693 

—  1.0 

12978 

.11321 

21.5 

11985 

7863 

I  -26 

14295 

.15517 

-  0.5 

12954 

.11241 

22.0 

11965 

7789 

0.00 

o.oo 

0.00 

-25 

14237 

7.15341 

0.0 

12931 

7.11162 

22.5 

11944 

7.07716 

-24 

14179 

.15166 

+  0.5 

12907 

.11082 

23.0 

11924 

7642 

-23 

14123 

.14991 

1.0 

12884 

.11006 

23-5 

11904 

7569 

—  22 

14066 

.14818 

1.5 

12860 

.10923 

24.0 

11884 

7496 

—  21 

14010 

.14645 

2.0 

12836 

.10844 

24.5 

11864 

7422 

0.00 

0.00 

0.00 

-20.0 

13955 

7.14472 

2.5 

12813 

7.10765 

25.0 

11844 

7.07349 

-19-5 

13927 

.14386 

3.o 

12790 

.10686 

25-5 

11824 

7276 

—  19.0 

13900 

.14301 

3-5 

12766 

.  10607 

26.0 

11804 

7204 

-18.5 

13872 

.14215 

4.0 

12744 

.10529 

26.5 

11784 

7I3J 

-18.0 

13845 

.14130 

4-5 

12720 

.10450 

27.0 

11765 

7058 

o.oo 

0.00 

o.oo 

-17.5 

13818 

7.14044 

5.0 

12698 

7.10372 

27.5 

1  1745 

7.06986 

-17.0 

13791 

•13959 

5-5 

12675 

.  10294 

28.0 

11726 

6913 

-16.5 

13764 

.13874 

6.0 

12652 

.10216 

28.5 

11706 

6841 

—  16.0 

13737 

.13790 

6.5 

12629 

.10138 

29.0 

11687 

6769 

-I5-5 

13710 

.13705 

7-0 

12607 

.10069 

29-5 

11667 

6697 

0.00 

0.00 

0.00 

-15.0 

13684 

7.13621 

7.5 

12584 

7.09982 

30.0 

11648 

7.06625 

-14-5 

13657 

.13536 

8.0 

12562 

9905 

30.5 

11629 

6554 

—  14.0 

13631 

.13452 

8-5 

12539 

9828 

31.0 

11610 

6482 

-13-5 

13604 

.13368 

9.0 

12517 

9750 

3i-5 

H591 

6411 

-13-0 

13578 

.13285 

9-5 

12495 

9673 

32.0 

11572 

6340 

0.00 

o.oo 

0.00 

-12.5 

13552 

7.13201 

10.0 

12473 

7.09596 

32.5 

11553 

7.06268 

—  12.0 

13526 

.13117 

10.5 

12451 

9519 

33-o 

11534 

6197 

-H.5 

13500 

.13034 

II.O 

12429 

9443 

33-5 

11515 

6126 

—  II.O 

13473 

.12951 

TI-5 

12407 

9366 

34-0 

11496 

6055 

-10.5 

13449 

.12868 

12.0 

12385 

9290 

34-5 

11477 

5984 

o.oo 

0.00 

o.oo 

-10.0 

13423 

7.12785 

12.5 

12363 

7.09214 

35.0 

11459 

7.05913 

-  9-5 

13398 

.12703 

13.0 

12342 

9T37 

35-5 

11440 

5843 

-  9.0 

13372 

.12620 

!3-5 

12320 

9061 

36-0 

11421 

5772 

-  8.5 

13347 

.12538 

14.0 

12299 

8986 

36.5 

11403 

5702 

-  8.0 

13322 

.  12456 

14.5 

12277 

8910 

37-0 

11385 

5632 

0.00 

0.00 

0.00 

-  7.5 

13297 

7.12374 

15.0 

12256 

7-08834 

37.5 

11366 

7-05562 

-  7.0 

13271 

.12292 

15.5 

12235 

8759 

38.0 

11348 

5492 

-  6.5 

13246 

.12210 

16.0 

12213 

8683 

38.5 

11330 

5422 

-  6.0 

13222 

.12128 

16.5 

12192 

8608 

39-o 

11311 

5352 

-  5-5 

13197 

.12047 

17.0 

12171 

8533 

39-5 

11293 

5282 

0.00 

o.oo 

0.00 

-  5.0 

13172 

7.11966 

17.5 

12150 

7.08458 

40.0 

11275 

7.05213 

SMITHSONIAN  TABLES. 


224 


TABLE   84-. 
WEIGHT    IN    GRAMMES    OF    ONE    CUBIC    CENTIMETRE    OF    AIR. 

Temperature  term  (Continued). 


t. 

\  760 

Log  8t,  760 

t. 

^t.  760 

Log  St,  760 

t. 

^1,760 

Log  8t>  76o 

c. 

o.oo 

—  IO 

C. 

o.oo 

—  10 

c. 

0.00 

—  IO 

40° 

11275 

7.05213 

50° 

10926 

7-03845 

60° 

10597 

7.02518 

4i 

11239 

.05074 

5i 

10892 

.03710 

61 

10565 

.02388 

42 

11204 

.04936 

52 

10858 

•03576 

62 

10534 

.02258 

43 

11168 

.04798 

53 

10825 

.03443 

63 

10502 

.02128 

44 

11133 

.04660 

54 

10792 

.03309 

64 

10471 

.01999 

o.oo 

0.00 

0.00 

45 

11098 

7.04523 

55 

10759 

7.03177 

65 

10440 

7.01870 

46 

11063 

.04387 

56 

10726 

.03044 

66 

10409 

.01742 

47 

11028 

.04251 

57 

10694 

.02912 

67 

10379 

.01614 

48 

10994 

.04115 

58 

10661 

.02780 

68 

10348 

.01486 

49 

10960 

.03980 

59 

10629 

.02649 

69 

10318 

.01358 

TABLE  85. 


Humidity  term  :  Values  of  0.378*?.     Auxiliary  to  Table  86. 
e  =  Vapor  pressure  in  mm.     (Landolt-Bornstein,  1905.} 


I  Dewpoint. 

e. 

Vapor 
Pressure. 

(fee.) 

0.378^. 

Dewpoint. 

e. 

Vapor 
Pressure. 

(Water.} 

0.378;-. 

Dewpoint. 

e. 

Vapor 
Pressure. 

(Water.} 

0.378^. 

C. 

mm. 

mm. 

C. 

mm. 

mm. 

C. 

mm. 

mm. 

—  50° 

0.034 

O.OI 

0° 

4-579 

i-73 

30 

31-555 

H-93 

45 

o.o6[ 

o  02 

I 

4.921 

1.86 

31 

33.4I6 

12  63 

40 

o  105 

0.04 

2 

5-286 

2.00 

32 

35-372 

13-37 

35 

°-i73 

0.07 

3 

5-675 

2.15 

33 

37.427 

14.15 

30 

0.292 

0  II 

4 

6.088 

2.30 

34 

39.586 

14.96 

—  25 

0.484 

0.18 

5 

6.528 

2.47 

35 

41.853 

15.82 

24 

0-534 

O.20 

6 

6-997 

2.65 

36 

44-23 

16.72 

23 

0589 

O.22 

7 

7494 

283 

37 

46.73 

17.66 

22 

0.648 

O.24 

8 

8.023 

3-03 

38 

49.35 

18.65 

21 

0.714 

0.27 

9 

8.584 

3.24 

39 

52.09 

19.69 

^20 

0.787 

0.30 

10 

9.179 

3.47 

40 

54-97 

20.78 

19 

0.868 

0-33 

ii 

9.810 

3-71 

4i 

57.98 

21.92 

18 

0-955 

0.36 

12 

10.479 

3.96 

42 

61.13 

23.12 

17 

1.048 

O.4O 

13 

11.187 

4.23 

43 

64.43 

24-35 

16 

1.148 

0-44 

14 

11.936 

4.51 

44 

67.89 

25.66 

—  15 

•257 

0.48 

15 

12.728 

4.81 

45 

7I.50 

27.02 

14 

•375 

0.52 

16 

I3-565 

5.13 

46 

75  28 

28.46 

13 

.506 

057 

17 

14.450 

5.46 

47 

79-23 

29-95 

12 

650 

0.62 

18 

15-383 

5.82 

48 

8336 

3L5I 

II 

.806 

0.68 

19 

16.367 

6.19 

49 

87.67 

33-H 

—  10 

1.974 

o.75 

20 

17.406 

6.58 

50 

92.17 

34.84 

9 

2.154 

0.81 

21 

18.503 

6-99 

51 

96-87 

36.62 

8 

2  347 

0.89 

22 

19.661 

7-43 

52 

101.77 

38.47 

7 

2-557 

0.97 

23 

20.883 

7  90 

53 

106.88 

40.40 

6 

2.785 

1.05 

24 

22.178 

8.38 

54 

112.  21 

42.42 

—  5 

3-032 

i.i5 

25 

23-546 

8.90 

55 

117.77 

44-52 

4 

3.299 

1.25 

26 

24987 

945 

56 

123.56 

46.71 

3 

3-586 

1.36 

27 

26.505 

IO.O2 

57 

12959 

48.98 

2 

3.894 

1.47 

28 

28.  103 

10.62 

58 

135.87 

5L36 

-    I 

4.223 

i.  60 

29 

29.785 

11.26 

59 

142.41 

53.83 

0 

4-579 

1-73 

30 

31-555 

11-93 

60 

149.21 

56.40 

SMITHSONIAN  TABLES. 


225 


TABLE  86. 

WEIGHT   IN    GRAMMES  OF   ONE   CUBIC  CENTIMETRE   OF   AIR. 

$         h        i)  —  0.378*? 
Humidity  and  pressure  terms  combined  :  —  =  -7—  = ^ 

b=  Barometric  pressure  in  mm.  ;  e=  Vapor  pressure  in  mm. 


h. 

h 

760'  • 

h 
L°9  760- 

h. 

h 

760* 

h 
Log  _.  • 

760 

h. 

h 

76o' 

L°°  760- 

mm. 

—  10 

mm. 

—  10 

mm. 

—  IO 

300 

Q-3947 

9.59631 

400 

0.5263 

9.72125 

450 

0.5921 

9.77240 

302 

•3974 

•59919 

401 

•5276 

.72233 

45i 

•5934 

.77336 

304 

.4000 

.60206 

402 

-5289 

.72341 

452 

•  5947 

•77432 

306 

.4026 

.60491 

403 

•5303 

•72449 

453 

•5961 

.77528 

308 

.4053 

.60774 

404 

•53i6 

•72557 

454 

.5974 

.77624 

310 

0.4079 

9.61055 

405 

0.5329 

9.72664 

455 

0.5987 

9.77720 

312 

.4105 

•61334 

406 

•5342 

.72771 

456 

.6000 

.77815 

3H 

.4132 

.61612 

407 

•5355 

.72878 

457 

.6013 

.77910 

3i6 

.4158 

.61887 

408 

-5369 

•72985 

458 

.6026 

.78005 

3i« 

.4184 

.62161 

409 

.5382 

.73091 

459 

.6040 

.78100 

320 

0.4211 

9.62434 

410 

0-5395 

9.73I97 

460 

0.6053 

9.78194 

322 

.4237 

.62704 

411 

.5408 

•73303 

461 

.6066 

.78289 

324 

.4263 

.62973 

412 

.5421 

.73408 

462 

.6079 

.78383 

326 

.4289 

.63240 

413 

•5434 

.73514 

463 

.6092 

•78477 

328 

.4316 

.63506 

414 

•5447 

.73619 

464 

.6105 

•78570 

330 

0.4342 

9.63770 

415 

0.5461 

9.73723 

465 

0.6118 

9.78664 

332 

.4368 

.64032 

416 

•5474 

.73828 

466 

.6132 

.78757 

334 

•4395 

.64293 

417 

•5487 

.73932 

467 

.6145 

.78850 

336 

.4421 

.64552 

418 

•5500 

.74036 

468 

.6158 

•78943 

338 

•4447 

.64810 

419 

•5513 

.74140 

469 

.6171 

.79036 

340 

0.4474 

9.65066 

420 

0.5526 

9.74244 

470 

0.6184 

9.79128 

342 

.4500 

.65321 

421 

•5540 

•74347 

471 

.6197 

.79221 

344 

.4526 

.65574 

422 

•5553 

•74450 

472 

.6210 

•79313 

346 

•4553 

.65826 

423 

•5566 

.74553 

473 

.6224 

•79405 

348 

•4579 

.66076 

424 

•5579 

•74655 

474 

.6237 

.79496 

350 

0.4605 

9.66325 

425 

0.5592 

9-74758 

475 

0.6250 

9.79588 

352 

.4632 

•66573 

426 

•5605 

.74860 

476 

.6263 

.79679 

354 

•4658 

.66819 

427 

,5618 

.74961 

477 

.6276 

.79770 

356 

.4684 

.67064 

428 

.5632 

•75063 

478 

.6289 

.79861 

358 

.4711 

•67307 

429 

•5645 

.75^64 

479 

•6303 

.79952 

360 

0.4737 

9-67549 

430 

0.5658 

9-75265 

480 

0.6316 

9.80043 

362 

•4763 

.67790 

43i 

•5671 

.75366 

481 

.6329 

.80133 

364 

.4789 

.68029 

432 

•  5684 

•75467 

482 

.6342 

.80223 

366 

.4816 

.68267 

433 

•5697 

•75567 

483 

.6355 

.80313 

368 

.4842 

.68503 

434 

•5711 

•75668 

484 

.6368 

.80403 

370 

0.4868 

9.68739 

435 

0.5724 

9.75768 

485 

0.6382 

9.80493 

372 

•4895 

.68973 

436 

•5737 

•75867 

486 

-6395 

.80582 

374 

.4921 

.69206 

437 

•5750 

.75967 

487 

.6408 

.80672 

376 

•4947 

•69437 

438 

•5763 

.76066 

488 

.6421 

.80761 

378 

•4974 

.69668 

439 

.5776 

.76165 

489 

.6434 

.80850 

380 

0.5000 

9.69897 

440 

0.5790 

9.76264 

490 

0.6447 

9.80938 

382 

.5026 

.70125 

441 

•5803 

.76362 

491 

.6461 

.81027 

384 

•5053 

•70352 

442 

.5816 

.76461 

492 

.6474 

.81115 

386 

•5079 

.70577 

443 

.5829 

.76559 

493 

.6487 

.81203 

388 

•5105 

.70802 

444 

.5842 

.76657 

494 

.6500 

.81291 

390 

0.5132 

9.71025 

445 

0.5855 

9.76755 

495 

0.6513 

9.81379 

392 

•5158 

.71247 

446 

.5868 

.76852 

496 

.6526 

.81467 

394 

.5184 

.71468 

447 

•  5882 

.76949 

497 

.6540 

.81556 

396 

•  5211 

.71688 

448 

.5895 

.77046 

498 

.6553 

.81642 

398 

•5237 

.71907 

449 

.5908 

•77143 

499 

.6566 

.81729 

SMITHSONIAN  TABLE*. 


226 


TABLE  86. 
WEIGHT  IN   GRAMMES  OF  ONE  CUBIC  CENTIMETRE  OF  AIR. 

8         h        b  —  0.378^ 
Humidity  and  pressure  terms  combined  :  — -  =  —^-  = -^ — 

b=  Barometric  pressure  in  mm.  ;  e—  Vapor  pressure  in  mm. 


h. 

h 

760 

Log-!-. 
760 

h. 

h 

760' 

M-jfc 

h. 

h 

76o' 

L°97^" 

mm. 

—  10 

mm. 

—  10 

mm. 

—  10 

500 

0.6579 

9.81816 

550 

0.7237 

9-85955 

600 

0.7895 

9-89734 

501 

.6592 

.81902 

55i 

•  7250 

.86034 

601 

.7908 

.89806 

502 

.6605 

.81989 

552 

.7263 

.86112 

602 

.7921 

.89878 

503 

.6618 

.82075 

553 

.7276 

.86191 

603 

•7934 

.89950 

504 

.6632 

.82162 

554 

.7290 

.86270 

604 

•  7947 

.90022 

505 

0.6645 

9.82248 

555 

0.7303 

9.86348 

605 

0.7961 

9.90094 

506 

.6658 

•82334 

556 

.7316 

.86426 

606 

•7974 

.90166 

507 

.6671 

.82419 

557 

.7329 

.86504 

607 

.7987 

.90238 

508 

.6684 

.82505 

558 

•7342 

.86582 

608 

.8000 

.90309 

509 

•  6697 

.82590 

559 

•7355 

.86660 

609 

.8013 

.90380 

510 

0.6711 

9.82676 

560 

0.7368 

9.86737 

610 

0.8026 

9.90452 

5ii 

.6724 

.82761 

56i 

.7382 

.86815 

611 

.8040 

.90523 

5^2 

.6737 

.82846 

562 

•7395 

.86892 

612 

.8053 

.90594 

513 

.6750 

.82930 

563 

.7408 

.86969 

613 

.8066 

.90665 

5H 

.6763 

.83015 

564 

.7421 

.87046 

614 

.8079 

.90735 

515 

0.6776 

9.83099 

565 

0-7434 

9.87123 

615 

0.8092 

9.90806 

5i6 

.6789 

.83184 

566 

•  7447 

.87200 

616 

.8105 

.90877 

517 

.6803 

.83268 

567 

.7461 

.87277 

617 

.8118 

.90947 

5i8 

.6816 

.83352 

568 

•7474 

.87353 

618 

.8132 

.91017 

519 

.6829 

.83435 

569 

.7487 

.87430 

619 

•8145 

.91088 

520 

0.6842 

9.83519 

570 

0.7500 

9.87506 

620 

0.8158 

9.91158 

521 

•6855 

.83602 

57i 

.7513 

.87582 

621 

.8171 

.91228 

522 

.6869 

.83686 

572 

•7526 

.87658 

622 

.8184 

.91298 

523 

.6882 

.83769 

573 

-7540 

.87734 

623 

.8197 

.91367 

524 

.6895 

.83852 

574 

.7553 

.87810 

624 

.8211 

•9*437 

525 

0.6908 

9.83934 

575 

0.7566 

9-87885 

625 

0.8224 

9.91507 

526 

.6921 

.84017 

576 

•7579 

.87961 

626 

•8237 

•9J576 

527 

.6934 

.84100 

577 

.7592 

.88036 

627 

.8250 

.9*645 

528 

.6947 

.84182 

578 

.7605 

.88111 

628 

.8263 

.9!7i5 

529 

.6961 

.84264 

579 

.7618 

.88186 

629 

.8276 

•  9L784 

530 

0.6974 

9.84346 

580 

0.7632 

9.88261 

630 

0.8289 

9-9*853 

53i 

.6987 

.84428 

58i 

•  7645 

.88336 

631 

•8303 

.91922 

532 

.7000 

.84510 

582 

.7658 

.88411 

632 

•  8316 

.91990 

533 

.7013 

.84591 

583 

.7671 

.88486 

633 

.8329 

.92059 

534 

.7026 

.84673 

584 

.7684 

.88560 

634 

.8342 

.92128 

535 

0.7040 

9.84754 

585 

0.7697 

9.88634 

635 

0.8355 

9.92196 

536 

•7053 

.84835 

586 

.7711 

.88708 

636 

.8368 

.92264 

537 

.7066 

.84916 

587 

.7724 

.88782 

637 

.8382 

.92332 

538 

.7079 

.84997 

588 

•  7737 

.88856 

638 

.8395 

.92401 

539 

.7092 

.85078 

589 

.7750 

.88930 

639 

.8408 

.92469 

540 

0.7105 

9.85158 

590 

0.7763 

9.89004 

640 

0.8421 

9.92537 

54i 

.7118 

.85238 

59i 

.7776 

.89077 

641 

•8434 

.92604 

542 

.7132 

.85318 

592 

.7789 

.89151 

642 

.8447 

.92672 

543 

.7145 

•85399 

593 

.7803 

.89224 

643 

.8461 

.92740 

544 

.7158 

.85478 

594 

.7816 

.89297 

644 

.8474 

.92807 

545 

0.7171 

9.85558 

595 

0.7829 

9.89370 

645 

0.8487 

9.92875 

546 

.7184 

.85638 

596 

.7842 

.89443 

646 

.8500 

.92942 

547 

.7197 

.85717 

597 

.7855 

.89516 

647 

.8513 

.93009 

548 

.7211 

•85797 

598 

.7868 

•89589 

648 

.8526 

.93076 

549 

•7224 

.85876 

599 

.7882 

.89662 

649 

•8539 

.93143 

SMITHSONIAN  TABLES. 


227 


TABLE  86. 

WEIGHT   IN    GRAMMES   OF   ONE   CUBIC  CENTIMETRE   OF  AIR. 

d         h 

Humidity  and  pressure  terms  combined  :  —  =  —y-r  = 

d0       760 


760 


=  Barometric  pressure  in  mm.  ;  e  =  Vapor  pressure  in  mm. 


h. 

h 

760' 

Log  «•-. 

760 

h. 

h 

760' 

L«°-^ 

h. 

h 

760' 

^ 

mm. 

.   —  10 

mm. 

—  10 

mm. 

—  10 

650 

0.8553 

9.93210 

700 

0.9211 

9.96428 

750 

0.9868 

9-99425 

651 

.8566 

.93277 

701 

.9224 

.96490 

75i 

.9882 

•99483 

652 

.8579 

•93341 

702 

•9237 

•96552 

752 

.9895 

•99540 

653 

.8592 

.93410 

703 

.9250 

.96614 

753 

.9908 

•99598 

654 

.8605 

.93476 

704 

.9263 

.96676 

754 

.9921 

•99656 

655 

0.8618 

9-93543 

705 

0.9276 

9.96738 

755 

0-9934 

9.99713 

656 

.8632 

.93609 

706 

.9289 

•96799 

756 

•9947 

.99771 

657 

.8645 

.93675 

707 

•9303 

.96860 

757 

.9961 

.99828 

658 

.8658 

•93741 

708 

.9316 

.96922 

758 

•9974 

.99886 

659 

.8671 

.93807 

709 

•9329 

.96983 

759 

.9987 

•99943 

660 

0.8684 

9-93873 

710 

0.9342 

9.97044 

760 

1.  0000 

o.ooooo 

661 

.8697 

-93939 

711 

•9355 

.97106 

761 

.0013 

.00057 

662 

.8711 

.94004 

712 

.9368 

.97167 

762 

.0026 

.00114 

663 

.8724 

.94070 

7i3 

.9382 

.97228 

763 

.0039 

.00171 

664 

.8737 

.94135 

714 

•9395 

.97288 

764 

•0053 

.00228 

665 

0.8750 

9.94201 

715 

0.9408 

9-97349 

765 

1.0066 

0.00285 

666 

.8763 

.94266 

716 

.9421 

.97410 

766 

.0079 

.00342 

667 

.8776 

.94331 

717 

•9434 

.97470 

767 

.0092 

.00398 

668 

.8790 

•94396 

718 

•9447 

•97531 

768 

.0105 

.00455 

669 

.8803 

•9446i 

719 

.946i 

•97592 

769 

.0118 

.00511 

670 

0.8816  ' 

9.94526 

720 

0.9474 

9.97652 

770 

1.0132 

0.00568 

671 

.8829 

•94591 

721 

.9487 

.97712 

771 

.0145 

.00624 

672 

.8842 

.94656 

722 

•9500 

.97772 

772 

.0158 

.00680 

673 

.8855 

.94720 

723 

•9513 

•97832 

773 

.0171 

.00736 

674 

.8869 

.94785 

724 

.9526 

•97892 

774 

.0184 

.00793 

675 

0.8882 

9.94849 

725 

0-9539 

9-97952 

775 

1.0197 

0.00849 

676 

•8895 

•949*3 

726 

•9553 

.98012 

776 

.0211 

.00905 

677 

.8908 

.94978 

727 

.9566 

.98072 

777 

.0224 

.00961 

678 

.8921 

.95042 

728 

•9579 

.98132 

778 

.0237 

.01017 

679- 

.8934 

.95106 

729 

•9592 

.98191 

779 

.0250 

.01072 

680 

0.8947 

9.95170 

730 

0.9605 

9.98250 

780 

1.0263 

0.01128 

681 

.8960 

.95233 

73i 

.9618 

.98310 

78i 

.0276 

.01184 

682 

.8974 

•95297 

732 

.9632 

.98370 

782 

.0289 

.01239 

683 

.8987 

.9536i 

733 

.9645 

.98429 

783 

.0303 

.01295 

684 

.9000 

•95424 

734 

.9658 

.98488 

784 

.0316 

.01350 

685 

0.9013 

9.95488 

735 

0.9671 

9.98547 

785 

1.0329 

0.01406 

686 

.9026 

•95551 

736 

.9684 

.98606 

786 

.0342 

.01461 

687 

.9039 

.95614 

737 

•9697 

-98665 

787 

•0355 

.01516 

688 

.9053 

.95677 

738 

.9711 

.98724 

788 

.0368 

.01571 

689 

.9066 

•95740 

739 

.9724 

•98783 

789 

.0382 

.01626 

690 

0.9079 

9.95804 

740 

0-9737 

9.98842 

790 

1.0395 

0.01681 

691 

.9092 

.95866 

741 

•9750 

.98900 

791 

.0408 

.01736 

692 

•9105 

.95929 

742 

.9763 

.98959 

792 

.0421 

.01791 

693 

.9118 

.95992 

743 

.9776 

.99018 

793 

.0434 

.01846 

694 

.9132 

.96054 

744 

.9789 

.99076 

794 

.0447 

.01901 

695 

0.9145 

9.96117 

745 

0.9803 

9-99*34 

795 

I.046I 

0.01955 

696 

.9158 

.96180 

746 

.9816 

.99192 

796 

.0474 

.02010 

697 

.9171 

.96242 

747 

.9829 

.99251 

797 

.0487 

.02064 

698 

.9184 

.96304 

748 

.9842 

.99309 

798 

.0500 

.02119 

699 

.9197 

.96366 

749 

.9855 

.99367 

799 

.0513 

.02173 

SMITHSONIAN  TABLES. 


228 


TABLE  87. 
AVOIRDUPOIS    POUNDS   AND    OUNCES    INTO    KILOGRAMMES. 

i  avoirdupois  pound  —  0.4535924  kilogramme, 
i  avoirdupois  ounce  =  0.0283495  kilogramme. 


Pounds. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

kg. 

0 

0.0000 

0.0454 

0.0907 

0.1361 

0.1814 

0.2268 

0.2722 

0.3175 

0.3629 

0.4082 

i 

0.4536 

0.4990 

0-5443 

0.5897 

0.6350 

0.6804 

0.7257 

0.7711 

0.8165 

0.8618 

2 

0.9072 

0.9525 

0.9979 

1.0433 

1.0886 

I.I340 

I.I793 

1.2247 

1.2701 

I.3I54 

3 

1.3608 

1.4061 

I45I5 

1.4969 

1.5422 

1.5876 

1.6329 

1.6783 

1.7237 

1.7690 

4 

1.8144 

1.8597 

1.9051 

1.9504 

1.9958 

2.0412 

2.0865 

2.1319 

2.1772 

2.2226 

5 

2.2680 

2.3133 

2.3587 

2.4040 

2-4494 

2.4948 

2.5401 

2.5855 

2.6308 

2.6762 

6 

2.7216 

2.7669 

2.8123 

2.8576 

2.9030 

2.9484 

2-9937 

3.0391 

3.0844 

3-1298 

7 

3-1751 

3.2205 

3-2659 

3-3II2 

3-3566 

34019 

3-4473 

3-4927 

3.5380 

3.5834 

8 

3.6287 

3-674I 

3.7195 

3.7648 

3.8102 

3.8555 

3.9009 

3.9463 

3.9916 

4.0370 

9 

4.0823 

4.1277 

4.I73I 

4.2184 

4.2638 

4.3091 

4.3545 

4.3998 

4.4452 

4.4906 

Ounces. 

.0 

' 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

kg. 

kg. 

kg. 

kg- 

kg. 

kg. 

kg. 

kg- 

kg. 

kg. 

0 

o.oooo 

0.0028 

0.0057 

0.0085 

O.OII3 

O.OI42 

0.0170 

0.0198 

0.0227 

0.0255 

i 

.0283 

.0312 

.0340 

.0369 

.0397 

.0425 

.0454 

.0482 

.0510 

•0539 

2 

.0567 

•0595 

.0624 

.0652 

.0680 

.0709 

.0737 

.0765 

.0794 

.0822 

3 

.0850 

.0879 

.0907 

.0936 

.0964 

.0992 

.IO2I 

.1049 

.1077 

.1106 

4 

.1134 

.1162 

.1191 

.1219 

.1247 

.1276 

.1304 

.1332 

.1361 

.1389 

5 

0.1417 

o.  1446 

0.1474 

0.1503 

O.I53I 

o.  1559 

0.1588 

0.1616 

0.1644 

0.1673 

6 

.1701 

.1729 

.1758 

.1786 

.1814 

.1843 

.1871 

.1899 

.1928 

.1956 

7 

.1984 

.2013 

.2041 

.2070 

.2098 

.2126 

•2155 

.2183 

.2211 

.2240 

8 

.2268 

.2296 

.2325 

.2353 

.2381 

.2410 

.2438 

.2466 

•2495 

.2523 

9 

•2551 

.2580 

.2608 

.2637 

.2665 

.2693 

.2722 

•2750 

.2778 

.2807 

10 

0.2835 

0.2863 

0.2892 

0.2920 

o.  2948 

0.2977 

0.3005 

0.3033 

0.3062 

0.3090 

ii 

.3118 

.3147 

.3175 

.3203 

.3232 

.3260 

.3289 

•3317 

•3345 

•3374 

12 

.3402 

•3430 

•3459 

.3487 

•3515 

•3544 

.3572 

.3600 

.3629 

•3657 

13 

.3685 

-37I4 

•3742 

•3770 

•3799 

.3827 

.3856 

.3884 

.3912 

•3941 

14 

•3969 

•3997 

.4026 

.4054 

.4082 

4III 

•4139 

.4167 

.4196 

.4224 

15 

.4252 

.4281 

4309 

.4337 

.4366 

•4394 

.4423 

•4451 

•4479 

.4508 

SMTHSONIAN  TABLES. 


22Q 


TABLE   88. 

KILOGRAMMES    INTO    AVOIRDUPOIS    POUNDS   AND    OUNCES. 

i  kilogramme  =  2.204622  avoirdupois  pounds. 


Kilo- 

0.0 

O.I 

0.2 

0.3 

0.4 

0.5 

0.6 

0. 

7 

0.8 

0.9 

grammes. 

Av.  Ibs. 

Av.  Ibs. 

Av. 

Ibs. 

Av.  Ibs. 

Av.  Ibs. 

Av.  Ibs 

Av.  Ibs. 

Av.  Ibs. 

Av.  Ibs. 

Av.  Ibs. 

0 

o.ooo 

O.22O 

O. 

441 

0.66  1 

0.882 

1.  102 

L323 

1.543 

1.764 

1.984 

i 

2.205 

2.425 

2.646 

2.866 

3.086 

3.307 

3-527 

3.748 

3.968 

4.189 

2 

4.409 

4.630 

4- 

850 

5.071 

5.291 

5.512 

5-732 

5.952 

6.173 

6-393 

3 

6.614 

6.834 

7-055 

7.275 

7.496 

7.716 

7-937 

8.157 

i 

^-378 

8.598  1 

4 

8.818 

9-039 

9-259 

9.480 

9.700 

9.921 

10.141 

10.362 

10.582 

10.803 

5 

11.023 

11.244 

11.464 

11.684 

11.905 

12.125 

12.346 

12.566 

12.787 

13.007 

6 

13.228 

13.448 

13.669 

I3-S 

89 

14.110 

H.330 

14.551 

14.771 

14.991 

15.212 

7 

15432 

I5-653 

15- 

873 

16.094 

16.314 

16.535 

16.755 

16.976 

17.196 

17.417 

8 

17.637 

17.857 

18.078 

18.298 

18.519 

18.739 

18.960 

19.180 

19.401 

19.621 

9 

19.842 

2O.O62 

20. 

283 

20.503 

20.723 

20.944 

21.164 

21.385 

21.605 

21.826 

Tenths  of  a  Kilogramme  into 

Ounces. 

Hundredths  of 
into  Decimals  of  a 

a  Kilogramme 
Pound  and  Ounces. 

kg. 

Oz. 

kg. 

Oz. 

kg. 

Av.  Ibs.      Oz. 

kg. 

Av.  Ibs.      Oz. 

O.I 

3-5274 

0.6 

21.1644 

O.OI 

O.O22   =  0.35 

0.06 

0.132   =   2.12 

.2 

7.0548 

•7 

24.6918 

.02 

.044  =  0.71 

.07 

.154  =  2.47 

•3 

10.5822 

.8 

28.2192 

-03 

.066  =  1.  06 

.08 

.176  =  2.82 

•4 

14.1096 

•9 

31-7466 

.04 

.088  =  1.41 

.09 

.198  ==  3.17 

•5 

17-6370 

I.O 

35-2740 

.05 

.no  =  1.76 

.10 

.220  =  3.53 

TABLE  89. 


GRAINS    INTO    GRAMMES. 

i  grain  =  0.06479892  gramme. 


Grains. 

0 

1 

2 

3 

4 

5 

6 

7 

8 

9 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

gram's. 

0 

0.0000 

0.0648 

0.1296 

0.1944 

0.2592 

0.3240 

0.3888 

0.4536 

0.5184 

0.5832 

10 

0.6480 

0.7128 

0.7776 

0.8424 

0.9072 

0.9720 

1.0368 

I.IOI6 

1.1664 

1.2312 

20 

1.2960 

1.3608 

1.4256 

1.4904 

1-5552 

1.6200 

1.6848 

1.7496 

1.8144 

1.8792 

30 

1.9440 

2.0088 

2.0736 

2.1384 

2.2032 

2.2680 

2.3328 

2.3976 

2.4624 

2.5272 

40 

2.5920 

2.6568 

2.7216 

2.7864 

2.8512 

2.9160 

2.9808 

3.0456 

3-II03 

3-I75I 

50 

3-2399 

3.3047 

3.3 

695 

3-4343 

3-4991 

3.5639 

3.6287 

3.6935 

3.7583 

3-8231 

60 

3.8879 

3.9527 

4.0175 

4.0823 

4.1471 

4.2119 

4.2767 

4.3415 

4.4063 

4.47II 

70 

4-5359 

4.6007 

4.6655 

4.7303 

4.7951 

4.8599 

4.9247 

4.9895 

5-0543 

5.H9I 

80 

5-1839 

5.2487 

5.3I35 

5.3783 

5.4431 

5.5079 

5.5727 

5.6375 

5.7023 

5.7671 

90 

5.8319 

5.8967 

5.9615 

6.0263 

6.0911 

6.1559 

6.2207 

6.2855 

6.3503 

6.4I5I 

Tenths  of  a  Grain. 

Hundredths 

of  a  Grain. 

Grain. 

gramme. 

Grain. 

gramme. 

Grain. 

gramme. 

Grain. 

gramme. 

O.I 

0.0065 

0.6 

0.0389 

O.OI 

0.0006 

0.06 

0.0039 

.2 

.0130 

•7 

.0454 

.02 

.0013 

.07 

.0045 

•3 

.0194 

.8 

.0518 

.03 

.0019 

.08 

.0052 

•4 

.0259 

•9 

-0583 

.04 

.0026 

.09 

.0058 

-5 

.0324 

I.O 

.0648 

•05 

.0032 

.10 

.0065 

SMITHSONIAN  TABLES. 


230 


GRAMMES    INTO    GRAINS. 

i  gramme  =  15.432351  grains. 


TABLE   so. 


Grammes. 

.0 

.1 

.2 

.3 

.4 

.5 

.6 

.7 

.8 

.9 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

0 

0.00 

1-54 

3.09 

4.63 

6.17 

7-72 

9.26 

I0.8o 

12.35 

13.89 

I 

15-43 

16.98 

18.52 

2O.O6 

21.  6l 

23.15 

24.69 

26.24 

27.78 

29.32 

2 

30.86 

32.41 

33-95 

35-49 

37.04 

38.58 

40.12 

41.67 

43-21 

44-75 

3 

46.30 

47.84 

49.38 

50.93 

52.47 

54.01 

55.56 

57-10 

58.64 

60.19 

4 

61.73 

63.27 

64.82 

66.36 

67.90 

69.45 

70.99 

72.53 

74.08 

75.62 

5 

77.16 

78.71 

80.25 

81.79 

83.33 

84.88 

86.42 

87.96 

89-51 

9L05 

6 

92-59 

94.14 

95.68 

97.22 

98.77 

100.31 

101.85 

103.40 

104.94 

106.48 

7 

108.03 

109.57 

in.  ii 

112.66 

114.20 

U5.74 

117.29 

118.83 

120.37 

121.92 

8 

123.46 

125.00 

126.55 

128.09 

129.63 

131-18 

132.72 

134.26 

i35.8o 

137.35 

9 

138-89 

140.43 

141.98 

143-52 

145.06 

146.61 

148.15 

149.69 

151-24 

152.78 

0 

i 

2 

3 

4 

5 

6 

7 

8 

9 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

Grains. 

0 

O.OO 

1543 

30.86 

46.30 

61.73 

77.16 

92.59 

108.03 

123.46 

138.89 

10 

154.32 

169.76 

185.19 

200.62 

216.05 

231.49 

246.92 

262.35 

277.78 

293.21 

20 

308.65 

324.08 

339-51 

354.94 

370.38 

385.81 

401.24 

416.67 

432.11 

447-54 

30 

462.97 

478.40 

493.84 

509.27 

524.70 

540.13 

555.56 

57LOO 

586.43 

601.86 

40 

617.29 

632.73 

648.16 

663.59 

679.02 

694.46 

709.89 

725.32 

740.75 

756.19 

50 

771.62 

787.05 

802.48 

817.91 

833.35 

848.78 

864.21 

879.64 

895.08 

910.51 

60 

925.94 

94L37 

956.81 

972.24 

987.67 

1003.10 

1018.54 

1033.97 

1049.40 

1064.83 

70 

080.26 

1095.70 

IIII.I3 

1126.56 

II4L99 

H5743 

1172.86 

1188.29 

1203.72 

1219.16 

80 

234-59 

1250.02 

1265.45 

1280.89 

1296.32 

I3II.75 

I327.I8 

1342.62 

1358.05 

137348 

90 

388.9I 

1404.34 

1419.78 

1435.21 

1450.64 

1466.07 

I48I.5I 

1496.94 

1512.37 

1527.80 

gramme. 

Grain.        gramme.       Grain. 

gramme 

Grain.         gramme.      Grain. 

O.OI 

0.154              0.06               0.926 

O.OOI 

0.015               0.006            0.093 

.02 

.309                .07               1.080 

.002 

.031                 .007              .108 

.03 

•463                 -oS               1.235 

.003 

.046                .008              .123 

.04 

.617                 .09               1-389 

.004 

.062                .009              .139 

•05 

.772                .10               1.543 

.005 

.077                 .010               .154 

TABLE    91. 
CONVERSION    OF    UNITS    OF    MAGNETIC    INTENSITY. 


English   Units. 

Dynes. 

Dynes. 

English    Units. 

, 

0.046  1  08 

O.I 

2.16882 

2 

.092  216 

.2 

4.33764 

3 

.138324 

•3 

6.50646 

4 

.184  432 

•4 

8.675  28 

5 

0.230  540 

0.5 

10.844  10 

6 

.276  648 

.6 

13.01292 

7 

.322  756 

•  7 

15.181  74 

8 

.368  864 

.8 

17.35056 

9 

.414972 

•9 

I9.5I938 

The   English   unit   of    magnetic    intensity   is  the  force   which    acting   for    i    second 

on   a   unit    of    magnetism,    associated  with   a   mass   of    i    grain,  produces   a 
velocity  of    i    foot  per    second. 

The    C.  G.  S.  unit   of    magnetic   intensity  is  the   dyne  —  the   force   which,   acting   on 

one  gramme  for  one  second,   generates  a  velocity  of    i    centimetre  per  second. 

The   dimensions   of  magnetic   intensity   are 

231 


TABLE  92. 

QUAIMTITYOF    RAI  N  FALL  CORRESPOND!  NG  TO  GIVEN    DEPTHS. 


Gallons 

per  acre. 

Depth  of  rainfall,  inches. 

Cubic  inches 
per  acre. 

United 
States  or 
Queen 
Anne. 

Imperial 
(British). 

Tons  per 
acre  (2,  ooo 
pounds  )  . 

62,726.4 

271.5 

226 

j  i 

o  02 

125  45"* 

CA'l 

452 

o  o^ 

188,179 

815 

678 

Z'O 

3      A 

o  04 

25O  QO5 

I  086 

QO/J. 

O  O5 

v^,6*2 

1,358 

I,I^O 

•O 

5  6 

o  06         

^76,358 

1,620 

1,^56 

6  8 

o  07                     

439,084 

1,900 

1,582 

7  Q 

o  08               

501,810 

2,171 

1,  808 

Q  O 

O  OQ 

564,536 

2,442 

2,0^4 

IO  I 

o  10       .          .         .  .    

627,264 

2,715 

2,261 

II   ^ 

O  25 

1,568,160 

6,789 

5,652 

28 

O  5O 

•*,  1^6,^20 

'  1^,577 

II,  ^O} 

56 

o  75 

4,704,480 

20,366 

16,055 

85 

I  CO                                                     ..... 

6,272,640 

27,154 

22,607 

II-5 

1.25 

7,840,800 

77    Q47 

28,250 

141 

I   SO 

9  408,960 

4O%^7I 

7-5    Q  I  I 

I7O 

I  75 

lo  Q77,  12o 

47  S2O 

1Q    56^ 

108 

2  OO 

12  545,28o 

S4  ^OQ 

45,214 

226 

2  25 

14   II^,44O 

6l  OQ7 

50,866 

255 

2  5O 

I5,68l  600 

67  866 

56,517 

283 

2  75 

I7,24Q,76o 

74  674 

62,l69 

-JI  i 

3.00. 

18,817,920 

81,463 

67,821 

T.T.Q 

4.OO  

25,090,560 

108,617 

9O,428 

452 

5.00. 

31,363,200 

135,772 

II3,O35 

565 

6.00  ..... 

37,6^5,840 

162,926 

135,642 

678 

232 


TABLE  93. 
ATMOSPHERIC  WATER  VAPOR  LINES  IN  THE  VISIBLE  SPECTRUM. 


Wave  lengths. 
ij.ij. 

Num- 
ber of 
lines. 

Inten- 
sity. 

Wave  lengths. 
pfi 

Num- 
ber of 
line.=. 

Inten- 
sity. 

c;2Q2  3.—  52Q6  O 

4? 

oo 

501  S.I46 

i 

5861  8-5870  o   ...... 

7 

CO 

5015  650.  . 

i 

5870.864  

i 

5915.840  

i 

^871.  7-5876  o 

8 

oo 

5916.0-5918.2. 

6 

oo 

q8?6  778 

I 

5018  6^5 

4 

^876  6-587Q  4 

4 

oo 

5QIQ.I75. 

ooo 

^870  820 

I 

5010  276.  . 

5 

^870  045 

I 

5QIQ.86o.  .  . 

7 

cSSo  7-^88  [  o 

2 

o 

5Q2O  T.05 

oo 

5881  14.7 

I 

5920.776  

I 

r88r  120 

o 

^Q2I  3.-  5Q22  6 

7 

o 

5882  084 

I 

CQ22  7^5 

2 

r882  2  "^887.  2 

7 

o 

5Q22  Q-^02^  4 

2 

o 

C.884  I  2O 

5 

502^  865 

I 

r884  4-^885  8 

2 

oo 

5Q24  O4O 

2 

5886  193 

5 

5024  40O 

4 

5886  560 

I 

5Q24  Q75 

OOO 

5886  6-5886  9 

2 

o 

5Q25  22O 

2 

5887  4.45 

5 

5026  8^,5. 

OOO 

5887  880 

-2 

5028  5IO.  . 

2 

5888  056 

00 

5Q20  O—5Q^I.2. 

5 

OO 

s888  020 

2 

5072  "^06.  . 

5 

q88q  TOT. 

CO 

50^2.  Q08.  . 

2 

5880  855 

7. 

50^^.2—5040  2.  . 

14 

OOO 

^800  100 

2 

594O.64O.  .  . 

I 

s8oo  4-^SQo  Q 

2 

oo 

594I.OOI.. 

oo 

5891  708 

I 

594l.2qo.  . 

5 

^801  72O 

o 

5041  47O 

ooo 

rgor  878 

4. 

5Q4I  845.  - 

2 

5802  608  . 

T 

5942.500  

oco 

C.8Q7  268 

o 

SQ42  6^5 

I 

c8o7  725 

I 

5042  780 

7, 

5804.6-5806.6.  . 

5 

o 

5944.530  

I 

er8o6  710 

I 

5044  O45 

I 

^80?  O4.7 

2 

5045  4—  50  i  5  5 

2 

oo 

c8Q7  7-s8Q8  2 

4 

OO 

5045  865. 

I 

c8o8  778 

4 

5046.22T. 

7 

^808.6-^800  o 

2 

oo 

5046  864 

ooo 

5800  215 

2 

5047.O62.  . 

I 

5800  752 

oo 

5Q47.28^. 

2 

5000  17.5 

2 

5047.6—5040*2 

4 

ooo 

5900  260     .... 

4 

5040-^00.  . 

2 

50OO  6-50OI  5 

•I 

oo 

5Q4Q  8-5054.6.  .  . 

II 

OO 

50OI  682.  . 

6 

5055.170.  . 

I 

50O2  238  

ooo 

5056.0—5056.6. 

4 

OOO 

59°2-363  

COCCI  O^^ 

I 
ooo 

5958098  

CQC8  4.6O 

I 

I 

CQOI  74.8 

I 

^061  6-^066  6 

c 

oo 

500^.9-5907.7  

IT. 

oo 

5966.885  

I 

5Qo8  O7O 

I 

5067.  540 

oo 

5008  4.25 

I 

5068  058  . 

2 

5QOO  21^ 

•7 

5068.280 

(  OO 

5000  668 

oo 

5068.405. 

2 

5010  108 

I 

506o.2—5Q7O.O. 

•z 

OO 

5QIO  5—  5QIO  Q 

i 

oo 

5071  557.  .  .  . 

I 

5qiO.q87 

2 

5075  7,1.0.  . 

I 

CQI  I  T  —  CQI  O  Q 

7 

oo 

5076  604 

OO 

CQI  -i  2  12 

•5 

5077  252 

I 

^014.  4.^0 

6 

5077  6—647Q  7 

TI 

ooo 

233 


TABLE  93. 

ATMOSPHERIC  WATER  VAPOR  LINES  IN  THE  VISIBLE  SPECTRUM. 


Wave  lengths 
!J-!J< 

Num- 
ber of 

lines. 

Inten- 
sity. 

Wave  lengths. 
WJL 

Num- 
ber of 
lines. 

Inten- 
sity. 

6480  285 

6941.260.    

OOO 

6480.4-6483.3    

4 

oooo 

6941-475  
604.2  4O2 

I 

2 

6483.468  

i 

6942.630  

I 

6491015  
6493.1-6493.5  

6/iQ/i   79  c 

2 

i 

00 
J 

6944  060.  .  .  
6947.782  
6947.863  

3 
5 

00 

6949.240.  

I 

0490  OO2  

2 

6Q  1Q  "*IO 

i 

6497.8-6514.5  

7 

00 

695  1  oio         

i 

6514.9^6    
6516.080    

2 
OOO 

6:)5;V828  

i 

65  [6.750     

I 

6954.0-6955.9          .. 

2 

00 

far  i  fa  Qr  c 

6956.660  ")    

4 

65I7.V65I9.4 

3 

oo 

6956.716/  

i 

6959.  704  

3 

6961.515  

4 

6522.1-6523.9  

4 

6964.812  

i 

6526.0-6530  8  

2 

OOO 

6971.135  

o 

6977.715  

3 

°532-595  

6981.722  

i 

"oo^1  /•*  

6985.220  

o 

6534-8-6542.6      

3 

OOO 

6986.833  

3 

"544-  J  4°  
6546.0-6^47  Q 

2 

oo 

6988   125  

o 

fic/iA  9cc 

6989.237  

3 

°54s-855   

6SS2  865 

I 

6990.632  

i 

6993'776  - 

2 

6554  °25  

{.rcf.   -jnQ 

6994.360    

I 

D55o-3°°   

6qq8  078 

O 

6557-4-'^558  4  •..  .. 

6^60  800 

J  ? 

6999.223  

2 

7OO4  ^7^ 

O 

6563.7-6569.0  

4 

oo 

7004.995  

2 

uo/^-o  ^u   
6^7^  08^ 

I 

7°°5-3-7oio  i  

2 

O 

7011.590  

2 

7016.^0. 

I 

6934-°75    



7016  675  

3 

DVo/  9i>/  

7023.770  

2 

60^0  87^ 

2 

7°27.2I3  

O 

6940.4-^6  

2 

7027.740  

2 

ABSORPTION  BY  ATMOSPHERIC  WATER  VAPOR  IN  THE 
INFRA-RED  SPECTRUM. 

Mr.  F.  E.  Fowle,  Jr.,  has  recently  shown  (see  Smithsonian  Miscellane- 
ous Collections,  volume  47)  that  the  transmission  of  solar  radiation  in  the 
following  bands  of  water  vapor  absorption  lying  in  the  infra-red  spectrum 
may  be  expressed  by  the  formula  e  =  e0amB,  in  which  e  and  e0  are  the  inten- 
sities of  radiation  at  these  wave  lengths  at  the  earth's  surface  and  outside 
the  atmosphere  respectively  ;  a,  the  transmission  coefficient  for  vertical  sun; 
m,  the  amount  of  air  traversed  by  the  solar  beam  as  compared  with  that  for 
zenith  sun,  and  d  the  amount  of  water  vapor  in  the  vertical  column  of  the 
air  as  determined  by  the  formula  d  =  0.23^,  in  which  e0  is  the  vapor  pressure 
in  centimetres  at  the  surface  of  the  earth  as  computed  from  readings  with 
the  wet  and  dry  bulb  thermometers. 

234 


TABLE   93A. 

ABSORPTION    BY  ATMOSPHERIC  WATER  VAPOR   IN   THE    INFRA-RED 

SPECTRUM. 


Name  of  band. 

Wave- 
lengths. 

Transmis- 
sion coef- 
ficient a. 

The  infra-red  bands  may  perhaps  be  composed 
of  numerous  fine  lines  which  the  bolographic 
apparatus  does  not  separately  distinguish. 
Wide  bands  of  very  great  atmospheric  water- 
vapor  absorption   are   found   in  the   infra-red 
spectrum  as  follows  : 

a 

A* 
0.718 
0.814 
0.896 
0-933 
0-945 
0.974 
1.119 

•134 
.172 

•331 

•451 
.469 

0.91 
0.92 
0.90 
0.63 
0.69 
0.91 

0-54 
0.60 
o  92 
o  74 
0.36 
0-55 

Name. 

Wave  lengths. 

Absorption  at 
Washington. 

p    

A*          A* 
0.926-0.978 
1.095-1.165 
1.319-1.498 
1.762-1.977 

2.520-2.845 

0.3  too.  5 
0.5  too.  8 
o  .  7  to  o  .  i 
o  .  9  to  i  .  o 

'•°{PS?,y} 

<T     

r  

$ 

*!  

x|r 

*1  

12 

X  

In  ^ 

In*  
*i  

See  Vol.  I,  Annals  Astrophysical  Observatory,  Smith- 
sonian Institution. 

F.  Paschen  gives  {Annalen  d.  Physik  u.  Chemie,  51,  p.  14,  1894;  tlie 
absorption  by  a  layer  33  centimetres  thick  of  water  vapor  at  100°  C.  and 
atmospheric  pressure  as  follows  : 


Wave  length           .        .    . 

n        /A 

2  20—3  IO 

jU.               JU. 

£5.77-7.67 

M              /"• 
7.67-IO  (?) 

Percentage  absorption  .  .  . 

80 

94 

94-13 

The  following  table  gives  the  results  obtained  by  Rubens  and  Aschkinass 
{Ajinaleii  d.  Physik  u.  Chemie,  64,  p.  598,  1898)  as  to  the  absorption  by  a 
layer  75  centimetres  thick  of  water  vapor  saturated  at  100°  C.  This  amount 
of  vapor  is  about  equivalent  to  a  layer  of  water  0.6  millimeter  thick  or  to 
i  /  50  of  the  water  in  a  total  vertical  atmospheric  column  whose  dew-point 
at  sea-level  is  10°  C.  The  region  of  spectrum  examined  includes  most  of 
the  region  of  terrestrial  radiation. 


Wave  length  

/* 
7.0 

V- 

8.0 

JU.               JU. 

9.0-12.0 

/"• 
12.4 

I* 

12.8 

M 
13.4 

M 

14.0 

Percentage  absorption  .  .  . 

75 

40 

6 

20 

13 

28 

22 

Wave  length  

V- 

14.  •* 

p- 
15.0 

M 

IS-7 

M- 

16.0 

/* 
17.5 

f* 
183 

M 
2O.O 

Percentage  absorption  .  .  . 

43 

35 

65 

52 

88 

80 

IOO 

235 


TABLE   94 
DIVISION    BY    28    OF    NUMBERS    FROM    28    TO    867972. 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

0 

-28 

56 

84 

112 

.140 

1  68 

196 

224 

252 

D. 

oo 

28 

56 

84 

840 

Q- 

00 

01 

02 

03 

30 

.  i 

29 

57 

85 

H3 

141 

169 

197 

225 

253 

D. 

12 

40 

68 

96 

812 

Q. 

04 

05 

06 

07 

29 

2 

30 

58 

86 

114 

142 

170 

198 

226 

254 

D. 

24 

52 

80 

784 

Q. 

08 

09 

10 

28 

3 

31 

59 

87 

H5 

H3 

171 

199 

227 

255 

D. 

08 

36 

64 

92 

756 

Q. 

II 

12 

13 

14 

27 

4 

32 

60 

88 

116 

144 

172 

200 

228 

256 

D. 

20 

48 

76 

728 

Q. 

15 

16 

17 

26 

5 

33 

61 

89 

117 

145 

173 

201 

229 

257 

D. 

04 

32 

60 

88 

700 

Q. 

18 

19 

20 

21 

25 

6 

34 

62 

9° 

118 

146 

174 

202 

230 

258 

D. 

16 

44 

72 

672 

Q. 

22 

23 

24 

24 

7 

35 

63 

9i 

119 

147 

175 

203 

231 

259 

D. 

oo 

28 

56 

84 

644 

Q. 

25 

26 

27 

28 

23 

8 

36 

64 

92 

1  20 

148 

176 

2O4 

232 

260 

D. 

12 

40 

68 

96 

616 

Q. 

29 

30 

31 

32 

22 

9 

37 

65 

93 

121 

149 

177 

205 

233 

261 

D. 

24 

52 

80 

588 

Q. 

33 

34 

35 

21 

10 

38 

66 

94 

122 

150 

178 

206 

234 

262 

D. 

08 

36 

64 

92 

560 

Q. 

36 

37 

38 

39 

20 

ii 

39 

67 

95 

I23 

151 

179 

207 

235 

263 

D. 

20 

48 

76 

532 

4O 

41 

4.2 

IQ 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

• 

*TW 

*+fc 

1  \7 

12 

40 

68 

96 

124 

152 

1  80 

208 

236 

264 

D. 

04 

32 

60. 

88 

504 

Q. 

43 

44 

45 

46 

18 

13 

4i 

69 

97 

125 

153 

181 

209 

237 

265 

D. 

16 

44 

72 

476 

Q. 

47 

48 

49 

17 

14 

42 

70 

98 

126 

154 

182 

210 

238 

266 

D. 

00 

28 

56 

84 

448 

Q. 

50 

51 

52 

53 

16 

15 

43 

7i 

99 

127 

155 

183 

211 

239 

267 

D. 

12 

40 

68 

96 

420 

a 

54 

55 

56 

57 

15 

16 

44 

72 

100 

128 

156 

184 

212 

240 

268 

D. 

24 

52 

80 

392 

a 

58 

59 

60 

14 

17 

45 

73 

101 

129 

157 

185 

213 

241 

269 

D. 

08 

36 

64 

92 

364 

Q- 

61 

62 

63 

64 

13 

18 

46 

74 

102 

130 

158 

186 

214 

242 

270 

D. 

20 

48 

76 

336 

Q. 

65 

66 

67 

12 

19 

47 

75 

103 

131 

159 

187 

215 

243 

271 

D. 

04 

32 

60 

88 

308 

a 

68 

69 

70 

71 

II 

20 

48 

76 

104 

132 

160 

188 

216 

244 

272 

D. 

16 

44 

72 

280 

Q. 

72 

73 

74 

10 

21 

49 

77 

105 

133 

161 

189 

217 

245 

273 

D. 

00 

28 

56 

84 

252 

Q. 

75 

76 

77 

78 

9 

22 

50 

78 

106 

134 

162 

190 

218 

246 

274 

D. 

T2 

40 

68 

96 

224 

Q. 

79 

80 

81 

82 

8 

23 

5i 

79 

107 

135 

163 

191 

2I9 

247 

275 

D. 

24 

52 

80 

196 

Q. 

83 

84 

85 

7 

24 

52 

80 

108 

136 

164 

192 

220 

248 

276 

D. 

08 

36 

64 

92 

1  68 

Q. 

86 

87 

88 

89 

6 

25 

53 

81 

109 

137 

165 

193 

221 

249 

277 

D. 

20 

48 

76 

140 

Q. 

90 

91 

92 

5 

26 

54 

82 

no 

138 

166 

194 

222 

250 

278 

D. 

04 

32 

60 

88 

112 

Q. 

93 

94 

95 

96 

4 

27 

55 

83 

III 

139 

167 

*95 

223 

251 

279 

D. 

16 

44 

72 

84 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

97 

98 

99 

3 

SMITHSONIAN  TABLES- 


236 


TABLE   95. 

DIVISION    BY    29    OF    NUMBERS    FROM    29    TO    898971 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

0 

29 

58 

87 

116 

145 

174 

203 

232 

261 

D. 

oo 

29 

58 

8.7 

870 

Q. 

00 

01 

02 

03 

30 

i 

30 

59 

88 

117 

146 

175 

204 

233 

262 

D. 

16 

45 

74 

841 

Q. 

04 

05 

06 

29 

2 

31 

60 

89 

118 

147 

176 

205 

234 

263 

D. 

03 

32 

61 

90 

812 

Q. 

07 

08 

09 

10 

28 

3 

32 

61 

90 

119 

148 

177 

206 

235 

264 

D. 

19 

48 

77 

783 

Q. 

II 

12 

13 

27 

4 

33 

62 

91 

120 

149 

178 

207 

236 

265 

D. 

06 

35 

64 

93 

754 

Q. 

14 

15 

16 

17 

26 

5 

34 

63 

92 

121 

150 

179 

208 

237 

266 

D. 

22 

51 

80 

725 

Q. 

18 

19 

20 

25 

6 

35 

64 

93 

122 

151 

180 

209 

238 

267 

D. 

09 

38 

67 

96 

696 

Q. 

21 

22 

23 

24 

24 

7 

36 

65 

94 

123 

152 

181 

2IO 

239 

268 

D. 

25 

54 

83 

667 

Q. 

25 

26 

27 

23 

8 

37 

66 

95 

124 

153 

182 

211 

240 

269 

D. 

12 

41 

70 

99 

638 

Q. 

28 

29 

30 

31 

22 

9 

38 

67 

96 

125 

154 

183 

212 

241 

270 

D. 

28 

57 

86 

609 

Q. 

32 

33 

34 

21 

10 

39 

68 

97 

126 

155 

184 

2I3 

242 

271 

D. 

15 

44 

73 

580 

Q. 

35 

36 

37 

20 

ii 

40 

69 

98 

127 

156 

185 

214 

243 

272 

D. 

02 

31 

60 

89 

55i 

Q. 

38 

39 

40 

41 

19 

12 

41 

70 

99 

128 

157 

186 

215 

244 

273 

D. 

18 

47 

76 

522 

Q. 

42 

43 

44 

18 

13 

42 

71 

100 

129 

158 

187 

216 

245 

274 

D. 

05 

34 

63 

92 

493 

Q. 

45 

46 

47 

48 

17 

14 

43 

72 

IOI 

I30 

159 

188 

217 

246 

275 

D. 

21 

50 

79 

464 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

49 

50 

51 

16 

15 

44 

73 

102 

I3I 

160 

189 

218 

247 

276 

D. 

08 

37 

66 

95 

435 

B, 

52 

53 

54 

55 

15 

16 

45 

74 

103 

132 

161 

190 

219 

248 

277 

. 

24 

53 

82 

406 

Q. 

56 

57 

58 

14 

17 

46 

75 

IO4 

133 

162 

191 

220 

249 

278 

D. 

ii 

40 

69 

98 

377 

Q. 

59 

60 

61 

62 

13 

18 

47 

76 

105 

134 

163 

192 

221 

250 

279 

D. 

27 

56 

85 

348 

Q. 

63 

64 

65 

12 

19 

48 

77 

106 

135 

164 

193 

222 

251 

280 

D. 

14 

43 

72 

319 

Q. 

66 

67 

68 

II 

20 

49 

78 

107 

136 

165 

194 

223 

252 

281 

D. 

01 

30 

59 

88 

290 

Q. 

69 

70 

71 

72 

10 

21 

50 

79 

108 

137 

166 

J95 

224 

253 

282 

D. 

17 

46 

75 

261 

Q. 

73 

74 

75 

9 

22 

51 

80 

109 

138 

167 

196 

225 

254 

283 

D. 

04 

33 

62 

91 

232 

Q. 

76 

77 

78 

79 

8 

23 

52 

81 

no 

139 

168 

197 

226 

255 

284 

D. 

20 

49 

78 

203 

Q. 

80 

81 

82 

7 

24 

53 

82 

in 

140 

169 

198 

227 

256 

285 

D. 

Q. 

07 
83 

1 

65 
85 

94 
86 

174 
6 

25 

54 

83 

112 

141 

170 

199 

228 

257 

286 

D. 

23 

52 

81 

145 

Q. 

87 

88 

89 

5 

26 

55 

84 

113 

142 

171 

200 

229 

258 

287 

D. 

10 

39 

68 

97 

116 

Q. 

90 

91 

92 

93 

4 

27 

56 

85 

114 

143 

172 

201 

230 

259 

288 

D. 

26 

55 

84 

87 

Q. 

94 

95 

96 

3 

28 

57 

86 

115 

144 

173 

202 

231 

260 

289 

D. 

13 

42 

71 

58 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

Q. 

97 

98 

99 

2 

1 

SMITHSONIAN  TABLES. 


237 


TABLE   96. 
DIVISION    BY  31  OF  NUMBERS  FROM  31   TO  96O969. 


0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

0 

i 

2 

3 
4 
5 
6 

7 
8 
9 

10 

ii 

12 
13 
14 
15 

31 
32 

33 
34 
35 
36 
37 
38 

39 
40 

42 

43 
44 
45 
46 

62 

63 
64 
65 
66 
67 
68 
69 
70 

72 

73 
74 
75 
76 

77 

93 
94 
95 
96 

97 
98 
99 

100 
101 
102 
103 
104 

105 

106 
107 
108 

124 
125 
126 
127 
128 
129 
130 

132 
133 

135 
136 
137 
138 
139 

155 
156 
157 
158 

160 
161 
162 

163 
164 

165 
166 

167 
1  68 
169 
170 

186 

187 
188 
189 
190 

192 
193 
194 

195 
196 
197 
198 
199 
200 

2OI 

217 
218 
219 

220 
221 
222 
223 
224 
225 
226 
227 
228 
229 
230 
231 
232 

248 

249 
250 

251 
252 
253 
254 
255 
256 
257 
258 
259 
260 
261 
262 
263 

279 
280 
281 
282 
283 
284 
285 
286 

287 
288 
289 
290 
291 
292 
293 
294 

1  tO  OKD  OO  O  KD  OO  OKD  O*O  O  tO  OiO  OO  OO  O  O  OO  OO  OO  O  O  OJO  DO  OO  O  *O  OO  OJO  OJO  O  KD  OKD  OO  OO  O  JO  OC  OO  OO  O 

oo 
00 
24 
04 
17 
07 
10 
10 

01 

55 
05 
48 
08 

II 

62 
02 
86 
06 

& 

72 
12 

93 
03 

930 
30 

899 
29 
868 
28 
837 
27 

27 
17 
20 
20 

13 
23 

34 
14 
58 
18 

21 

44 
24 

65 
15 
89 
19 
82 
22 

75 
25 

96 
16 

806 
26 
775 
25 
744 
24 

713 
23 

06 
26 
30 
30 
23 
33 
16 
36 

37 
27 
61 
31 

54 
34 

47 
37 

68 
28 
92 
32 

85 
35 
78 
38 

99 
29 

682 
22 
651 
21 
620 
20 
589 
19 

09 
39 
02 
42 
26 
46 
19 
49 

40 
40 

33 
43 

57 
47 
50 
50 

41 

64 
44 
88 
48 
81 
51 

95 
45 

558 
18 
527 
17 
496 
16 
465 
15 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

16 

17 
18 

19 

20 
21 
22 
23 

24 

25 
26 
27 
28 
29 
30 

47 

48 

49 

50 

52 

53 
54 

55 
56 

57 
58 

59 
60 
61 

78 

79 
80 

81 
82 
83 
84 
85 
86 

87 
88 
89 
90 

92 

109 
no 
in 

112 

"3 
114 

H5 
116 

117 
118 
119 

120 
121 
122 
123 

140 
141 
142 
143 
144 

145 
146 
147 
148 
149 
150 

152 
153 
154 

171 
172 

173 
174 

175 
176 

177 
178 
179 
180 
181 
182 

183 
184 

185 

202 
203 
204 
205 
206 
207 
208 
209 
210 
211 
212 
213 
214 
215 

216 

233 

234 
235 
236 

237 
238 

239 
240 

241 
242 
243 
244 

245 
246 

247 

264 
265 
266 
267 
268 
269 
270 
271 
272 

273 
274 

275 
276 

277 
278 

295 
296 

297 
298 

299 
300 
301 
302 

303 
304 
305 
306 

307 
308 

309 

12 

52 

05 
55 

29 
59 

22 

62 

43 
53 
36 
56 
60 
60 

53 
63 

74 
54 

67 
57 

6*1 

84 
64 

98 
58 

434 
14 

403 
13 
372 
12 

15 
65 
08 
68 

OI 

71 

25 
75 

-46 
66 

39 
69 

56 
76 

77 
67 
70 
70 
63 
73 
87 
77 

94 
74 

310 
10 
279 
9 

248 
8 
217 
7 

18 
78 
n 
81 
04 
84 
28 
88 

21 

91 

94 

07 
97 

49 
79 
42 
82 
35 
85 

59 
89 

80 
80 
73 
83 
66 
86 
90 
90 

83 
93 
76 
96 
69 
99 

97 
87 

1  86 
6 
155 
5 
124 

9I 

$2 

45 
95 
38 
98 

62 
2 

0 

100 

200 

300 

400 

500 

600 

700 

800 

900 

SMITHSONIAN  TABLES. 


238 


TABLE  97. 


NATURAL   SINES   AND    COSINES. 
Natural   Sines. 


Prop. 

Angle. 

0' 

10' 

20' 

30' 

40' 

50' 

60/ 

Angle. 

Parts 

forl'. 

0° 

.0000  oo 

.0029  09 

.0058  18 

.0087  27 

.0116  35 

.0145  44 

•0174  52 

89° 

i 

.017452 

.0203  6 

.0232  7 

.0261  8 

.0290  8 

.0319  9 

.0349  o 

88 

2 

.0349  o 

.0378  i 

.0407  i 

.0436  2 

•0465  3 

•0494  3 

•0523  4 

87 

3 

•0523  4 

•0552  4 

.0581  4 

.0610  5 

•0639  5 

.0668  5 

.0697  6 

86 

4 

.0697  6 

.0726  6 

•0755  6 

.0784  6 

.0813  6 

.0842  6 

.0871  6 

85 

5 

.0871  6 

.09005 

.0929  5 

•0958  5 

.0987  4 

.10164 

•10453 

84 

6 

•  1045  3 

.10742 

.1103  i 

.1132  o 

.1160  9 

.1189  8 

.1218  7 

83 

7 

.1218  7 

.12476 

.12764 

•  13053 

•1334 

.1363 

.1392 

82 

8 

.1392 

.1421 

.1449 

.1478 

•1507 

•1536 

.1564 

81 

2.9 

9 

.1564 

•1593 

.1622 

.1650 

.1679 

.1708 

.1736 

80 

2.9 

10 

•1736 

•  1765 

.1794 

.1822 

•  1851 

.1880 

.1908 

79 

2-9 

ii 

.1908 

•1937 

•  1965 

.1994 

.2022 

.2051 

.2079 

78 

2.9 

12 

.2079 

.2108 

•  2136 

.2164 

.2193 

.2221 

.2250 

77 

2.8 

13 

.2250 

.2278 

.2306 

•  2334 

•2363 

.2391 

.2419 

76 

2.8 

14 

.2419 

.2447 

.2476 

.2504 

.2532 

.2560 

.2588 

75 

2.8 

15 

.2588 

.2616 

.2644 

.2672 

.2700 

.2728 

.2756 

74 

2.8 

16 

.2756 

.2784 

.2812 

.2840 

.2868 

.2896 

.2924 

73 

2.8 

17 

.2924 

.2952 

•  2979 

.3007 

.3035 

.3062 

.3090 

72 

2.8 

18 
19 

.3090 
•  3256 

.3118 

•3145 

^3338 

.3201 
•3365 

•3228 

•3393 

-3256 
.3420 

70 

2.8 

2.7 

20 

.3420 

.3448 

•3475 

•3502 

•3529 

•3557 

.3584 

69 

2.7 

21 

.3584 

.3611 

•3638 

•3665 

.3692 

•3719 

•3746 

68 

2.7 

22 

•3746 

•3773 

.3800 

.3827 

.3854 

•3881 

•3907 

67 

2.7 

23 

•3907 

•3934 

.3961 

.3987 

.4014 

.4041 

.4067 

66 

2.7 

24 

.4067 

.4094 

.4120 

.4147 

•4173 

.4200 

.4226 

65 

2.7 

25 

.4226 

•4253 

•4279 

•4305 

.4331 

•4358 

•4384 

64 

2.6 

26 

•4384 

.4410 

•4436 

.4462 

.4488 

.4514 

•4540 

63 

2.6 

27 

•4540 

•4566 

•4592 

.4617 

•4643 

.4669 

•4695 

62 

2.6 

28 

•4695 

.4720 

.4746 

•4772 

•4797 

•4823 

.4848 

61 

2.6 

29 

.4848 

.4874 

.4899 

.4924 

•4950 

•4975 

.5000 

60 

2.5 

30 

.5000 

•5025 

•5050 

•5075 

.5100 

•5125 

•5150 

59 

2.5 

31 

•  5150 

.5175 

.5200 

•  5225 

•5250 

•5275 

•5299 

58 

2.5 

32 

•5299 

•5324 

•5348 

•5373 

.5398 

.5422 

•5446 

57 

2.5 

33 

•5446 

•5471 

•5495 

•5519 

•5544 

•5568 

•5592 

56 

2.4 

34 

•5592 

.5616 

.5640 

.5664 

.5688 

•5712 

•5736 

55 

2.4 

35 

•5736 

.5760 

.5783 

.5807 

•5831 

.5854 

•5878 

54 

2.4 

36 

.5878 

•5925 

•5948 

•5972 

•5995 

.6018 

53 

2.3 

37 

.6018 

.6041 

.6065 

.6088 

.6111 

.6134 

.6157 

52 

2.3 

38 

•6i57 

.6180 

.6202 

.6225 

.6248 

.6271 

.6293 

2.3 

39 

.6293 

•6316 

•6338 

.6361 

•6383 

.6406 

.6428 

50 

2.3 

40 

.6428 

.6450 

.6472 

.6494 

•6517 

.6539 

•  6561 

49 

2.2 

41 

.6561 

•6583 

.6604 

.6626 

.6648 

.6670 

.6691 

48 

2.2 

42 

.6691 

.6713 

•6734 

•6756 

.6777 

.6799 

.6820 

47 

2.2 

43 

.6820 

.6841 

.6862 

.6884 

.6905 

.6926 

.6947 

46 

2.1 

44 

.6947 

.6967 

.6988 

.7009 

.7030 

.7050 

.7071 

45 

2.1 

i       i 

1 

60' 

50/ 

40'     30' 

20' 

10' 

0' 

Angle.  | 

SMITHSONIAN  TABLES. 


Natural    Cosines. 
239 


NATURAL   SINES   AND    COSINES. 
Natural    Sines. 


TABLE  97. 


Prop. 

Angle. 

0' 

10' 

20' 

30' 

40'     50/ 

60' 

Angle. 

Parts 

forl'. 

45° 

.7071 

.7092 

.7112 

•7133 

•7T53 

•7173 

•7193 

44° 

2.0 

46 

.7193 

.7214 

•7234 

•  7254 

.7274 

•7294 

.7314 

43 

2.0 

47 

.73H 

•7333 

•7353    -7373 

•7392 

.7412 

•7431 

42 

2.0 

48 

•7431 

•7451 

.7470 

•  749° 

•7509 

.7528 

•7547 

41 

1.9 

49 

•7547 

.7566 

.7585 

.7604 

.7623 

.7642 

.7660 

40 

I.O 

50 

.7660 

.7679 

.7698 

.7716 

•7735 

•  7753 

.7771 

39 

J-9 

51 

.7771 

.7790 

.7808 

.7826 

•7844 

.7862 

.7880 

3« 

1.8 

52 

.7880 

.7898 

.7916 

•7934 

•  7951 

.7969 

.7986 

37 

1.8 

53 

.7986 

.8004 

.8021 

.8039 

.8056 

.8073 

.8090 

36 

i-7 

54 

.8090 

.8107 

.8124 

.8141 

.8158 

.8175 

.8192 

35 

1-7 

55 

.8192 

.8208 

.8225 

.8241 

.8258 

.8274 

.8290 

34 

1.6 

56 

.8290 

.8307 

•8323 

.8339 

.8355 

-8371 

.8387 

33 

1.6 

57 

.8387 

.8403 

.8418 

•  8434 

.8450 

.8465 

.8480 

32 

1.6 

58 

.8480 

.8496 

.8511 

.8526 

.8542 

•8557 

•8572 

3i 

1-5 

59 

.8572 

•  8587 

.8601 

.8616 

.8631 

.8646 

.8660 

30 

1-5 

60 

.8660 

.8675 

.8689 

.8704 

.8718 

.8732 

.8746 

2Q 

1.4 

61 

.8746 

.8760 

•  8774 

.8788 

.8802 

.8816 

.8829 

28 

1.4 

62 

.8829 

.8843 

•  8857 

.8870 

.8884 

•8897 

.8910 

27 

1.4 

63 

.8910 

.8923 

.8936 

.8949 

.8962 

•8975 

.8988 

26 

1-3 

64 

.8988 

.9001 

.9013 

.9026 

.9038 

•9051 

.9063 

25 

i-3 

65 

.9063 

•9075 

.9088 

.9100 

.9112 

.9124 

•9135 

24 

1.2 

66 

9*35 

.9147    .9159 

.9171 

.9182 

.9194 

.9205 

23 

1.2 

67 

.9205 

.9216 

.9228 

.9239 

.9250 

.9261 

.9272 

22 

I.I 

68 

.9272 

•  9283 

.9293 

.9304    .9315 

•9325 

•9336 

21 

I.I 

69 

•9336 

.9346 

.9356 

.9367    -9377 

.9387 

•9397 

20 

I.O 

70 

•9397 

.9407 

.9417 

.9426    .9436 

.9446 

•9455 

J9 

I.O 

7i 

•9455 

.9465 

•  9474 

.9483    .9492 

•  9502 

•9511 

18 

0.9 

72 

•9511 

.9520 

.9528 

•  9537 

•9546 

•9555 

•9563 

17 

0.9 

73 

•9563 

•  9572 

.958o 

.9588 

•9596 

.9605 

.9613 

16 

0.8 

74 

•9613 

.9621 

.9628 

.9636 

.9644 

.9652 

.9659 

15 

0.8 

75 

•9659 

.9667 

.9674 

.9681 

.9689 

.9696 

•  9703 

14 

0.7 

76 

•9703 

.9710 

.9717 

.9724 

•9730 

•9737 

•  9744 

J3 

0.7 

77 

•9744 

•  9750 

•9757 

.9763 

.9769 

•9775 

.9781 

12 

0.6 

78 

.9781 

.9787 

•9793 

•9799 

•9805 

.9811 

.9816 

II 

0.6 

79 

.9816 

.9822 

.9827 

•9833 

.9838 

.9843 

.9848 

10 

0.5 

80 

.9848 

.9853 

•  9858 

.9863 

.9868 

.9872 

.9877 

9 

0-5 

Si 

.9877 

.9881 

.9886 

.9890 

.9894 

.9899 

.9903 

8 

0.4 

82 

.9903    .9907 

.9911 

.9914 

.9918 

.9922 

•9925 

7 

0.4 

S3 

•9925 

.9929 

•9932 

•9936 

•9939 

•  9942 

•9945 

6 

o-3 

84 

•9945 

.9948 

•9951 

•9954 

•9957 

•9959 

.9962 

5 

0-3 

85 

.9962 

.9964 

.9967 

.9969 

.9971 

•9974 

.9976 

4 

0.2 

86 

•9978 

.9980 

.9981 

.9983 

•9985 

.9986 

3 

0.2 

87 

.9986 

.9988 

.9989 

.9990 

.9992 

•9993 

•9994 

2 

O.I 

88 

•9994 

•9995 

.9996 

•9997 

•9997 

.9998 

•9998 

I 

O.I 

89 

.9998 

•9999 

•9999 

I.OOOO    I.OOOO 

I.OOOO 

I.OOOO 

0 

O.O 

60' 

50'     40' 

30'     20' 

10' 

0' 

Angle. 

SMITHSONIAN  TABLES. 


Natural    Cosines 

240 


TABLE  98. 


NATURAL    TANGENTS    AND    COTANGENTS. 
Natural    Tangents. 


Angle. 

0' 

10' 

20' 

30' 

40' 

50' 

60' 

Angle. 

Prop.  Parts 
for  1'. 

0° 

.00000 

.0029  i 

.00582 

.00873 

.01164 

•0145  5 

.01746 

89° 

2.9 

I 

.0174  6 

.0203  6 

.0232  8 

.0261  9 

.0291  o 

.0320  i 

.0349  2 

88 

2-9 

2 

.0349  2 

•0378  3 

.0407  5 

.0436  6 

.0465  8 

.0494  9 

.0524  I 

87 

2.9 

3 

.0524  I 

•0553  3 

.0582  4 

.0611  6 

.0640  8 

.0670  o 

.0699  3 

86 

2-9 

4 

.0699  3 

.0728  5 

•0757  8 

.0787  o 

.08163 

.0845  6 

.0874  9 

85 

2-9 

5 

.0874  9 

.0904  2 

•0933  5 

.0962  9 

•0992  3 

.1021  6 

.10510 

84 

2-9 

6 

.1051  o 

.10805 

.11099 

•H394 

.11688 

.11983 

.12278 

83 

2.9 

7 

.12278 

•12574 

.12869 

•13165 

.1346 

.1376 

.1405 

82 

3.0 

8 

.1405 

•1435 

.1465 

•  1495 

.1524 

•1554 

.1584 

81 

3-o 

9 

.r584 

.1614 

.1644 

•1673 

.1703 

•!733 

.1763 

80 

3-0 

10 

.1763 

•1793 

.1823 

•1853 

.1883 

.1914 

.1944 

79 

3-o 

n 

.1944 

.1974 

.2004 

•2035 

.2065 

.2095 

.2126 

78 

3-0 

12 

.2126 

.2156 

.2186 

.2217 

.2247 

.2278 

.2309 

77 

3-1 

13 

.2309 

•2339 

.2370 

.2401 

•2432 

.2462 

•2493 

76 

3-i 

14 

•2493 

.2524 

•2555 

•2586 

.2617 

.2648 

.2679 

75 

3-1 

15 

.2679 

.2711 

.2742 

•2773 

.2805 

•2836 

.2867 

74 

3-i 

16 

.2867 

.2899 

.2931 

.2962 

.2994 

.3026 

•3057 

73 

3-2 

17 

.3057 

.3089 

.3121 

•3153 

•3185 

.3217 

.3249 

72 

3-2 

18 

•3249 

.3281 

.3314 

•3346 

•3378 

•3411 

•3443 

7i 

3-2 

!9 

•3443 

•3476 

.3508 

•3541 

•3574 

.3607 

.3640 

70 

3-3 

20 

.3640 

.3673 

.3706 

•3739 

•3772 

•3805 

.3839 

69 

3-3 

21 

.3839 

.3872 

.3906 

•3939 

•3973 

.4006 

.4040 

68 

3-4 

22 

.4040 

.4074 

.4108 

.4142 

.4176 

.4210 

•4245 

67 

34 

23 

.4245 

.4279 

•4314 

•4348 

•4383 

.4417 

•4452 

66 

3-5 

24 

•4452 

.4487 

.4522 

•4557 

•4592 

.4628 

.4663 

65 

3-5 

25 

4663 

.4699 

•4734 

.4770 

.4806 

.4841 

.4877 

64 

3-6 

26 

.4877 

•4913 

•4950 

.4986 

.5022 

•5059 

•5095 

63 

3-6 

27 

•5095 

•5132 

•5169 

.5206 

•5243 

.5280 

•5317 

'  62 

3-7 

28 

•5317 

•5354 

•5392 

•5430 

.5467 

•5505 

•5543 

61 

3-8 

29 

•5543 

.558i 

•5619 

•5658 

.5696 

•5735 

•5774 

60 

3-8 

30 

•5774 

.5812 

.5851 

.5890 

•5930 

•5969 

.6009 

59 

3-9 

3i 

.6009 

.6048 

.6088 

.6128 

.6168 

.6208 

.6249 

58 

4.0 

32 

.6249 

.6289 

•6330 

.6371 

.6412 

•6453 

.6494 

57 

4.1 

33 

.6494 

•6536 

.6577 

.6619 

.6661 

.6703 

.6745 

56 

4-2 

34 

.6745 

.6787 

.6830 

.6873 

.6916 

.6959 

.7002 

55 

4-3 

35 

.7002 

.7046 

.7089 

•7133 

.7177 

.7221 

•7265 

54 

4-4 

36 

.7265 

.7310 

•7355 

.7400 

•7445 

.7490 

.7536 

53 

4-5 

37 

.7536 

.758i 

.7627 

•7673 

.7720 

.7766 

•7813 

52 

4.6 

38 

.7813 

.7860 

.7907 

•7954 

.8002 

.8050 

.8098 

5i 

4-7 

39 

.8098 

.8146 

.8195 

.8243 

.8292 

.8342 

•8391 

50 

4-9 

40 

•8391 

.8441 

.8491 

.8541 

•8591 

.8642 

•8693 

49 

5-0 

4i 

.8693 

.8744 

.8796 

.8847 

.8899 

.8952 

.9004 

48 

5-2 

42 

.9004 

.9057 

.9110 

.9163 

.9217 

.9271 

•9325 

47 

5-4 

43 

.9325 

.9380 

•9435 

.9490 

•9545 

.9601 

•9657 

46 

5-5 

44 

.9657 

•9713 

.9770 

.9827 

.9884 

.9942 

I.OOOO 

45 

5-7 

60' 

50' 

40' 

30' 

20' 

10' 

0' 

Angle. 

Natural    Cotangents 

241 


TABLE  98. 


NATURAL   TANGENTS  AND    COTANGENTS. 
Natural    Tangents. 


Angle. 

0' 

10' 

20' 

30' 

40X 

50' 

60' 

Angle. 

Prop.  Parts 
for  V. 

45° 

I.OOOO 

1.0058 

.0117 

.0176 

1.0235 

.0295 

•0355 

44° 

5.9 

46 

1.0355 

1.0416 

.0477 

•0538 

1-0599 

.0661 

.0724 

43 

6.1 

47 

.0724 

1.0786 

.0850 

.0913 

1.0977 

.1041 

.1106 

42 

6-4 

48 

.1106 

1.1171 

.1237 

1.1303 

1.1369 

.1436 

.1504 

4i 

6.6 

49 

.1504 

I.I57I 

.1640 

.1708 

1.1778 

.1847 

.1918 

40 

6.9 

50 

.1918 

1.1988 

.2059 

.2131 

1.2203 

.2276 

•2349 

39 

7.2 

5i 

.2349 

1.2423 

.2497 

•2572 

1.2647 

.2723 

.2799 

38 

7-5 

52 

.2799 

1.2876 

.2954 

•  3032 

1.3111 

.3190 

.3270 

37 

7-9 

53 

.3270 

I-335I 

•3432 

.35H 

1-3597 

.3680 

-3764 

36 

8.2 

54 

.3764 

1.3848 

•3934 

.4019 

1.4106 

•4193 

.4281 

35 

86 

55 

.4281 

1-4370 

.4460 

•4550 

1.4641 

•4733 

.4826 

34 

9-1 

56 

.4826 

1.4919 

•  5013 

.5108 

1.5204 

•5301 

-5399 

33 

9-6 

57 

•5399 

1-5497 

•5597 

•5697 

I-5798 

.5900 

.6003 

32 

10.  1 

58 

.6003 

1.6107 

.6212 

.6319 

1.6426 

1.6534 

.6643 

3i 

10.7 

59 

.6643 

1-6753 

.6864 

.6977 

1.7090 

.7205 

.7321 

30 

II-3 

60 

.7321 

1.7437 

•7556 

.7675 

1.7796 

.7917 

1.8040 

29 

I2.O 

61 

.8040 

1.8165 

.8291 

.8418 

1.8546 

1.8676 

1.8807 

28 

12.8 

62 

.8807 

i  .8940 

.9074 

1.9210 

1-9347 

1.9486 

1.9626 

27 

13-6 

63 

.9626 

1.9768 

.9912 

2.0057 

2.0204 

2-0353 

2.0503 

26 

14.6 

64 

2.0503 

2.0655 

2.0809 

2.0965 

2.1123 

2.1283 

2.  1445 

25 

15.7 

65 

2.1445 

2.1609 

2.1775 

2.  1943 

2.2113 

2.2286 

2.2460 

24 

16.9 

66 

2.2460 

2.2637 

2.2817 

2.2998 

2.3183 

2.3369 

2.3559 

23 

I8.3 

67 

2-3559 

2.3750 

2.3945 

2.4142 

2.4342 

2-4545 

2-4751 

22 

19.9 

68 

2-4751 

2.4960 

2.5172 

2.5386 

2-5605 

2.5826 

2.6051 

21 

21.7 

69 

2.6051 

2.6279 

2.6511 

2.6746 

2.6985 

2.7228 

2-7475 

2O 

23-7 

70 

2.7475 

2.7725 

2.7980 

2.8239 

2.8502 

2.8770 

2.9042 

19 

7i 

2.9042 

2.9319 

2.9600 

2.9887 

3.0178 

3.0475 

3.0777 

18 

72 

3.0777 

3.1084 

3.1397 

3.I7I6 

3.2041 

3-237I 

3-2709 

17 

73 

3.2709 

3-3052 

3-3402 

3-3759 

3-4124 

3-4495 

3.4874 

16 

74 

3.4874 

3-5261 

3.5656 

3.6059 

3.6470 

3-6891 

3-7321 

15 

75 

3-7321 

3.7760 

3.8208 

3.8667 

3.9136 

3.9617 

4.0108 

14 

76 

4.0108 

4.0611 

4.1126 

4.1653 

4.2193 

4-2747 

4.3315 

13 

77 

4.3315 

4.3897 

4.4494 

4.5107 

4.5736 

4.6382 

4.7046 

12 

78 

4.7046 

4.7729 

4.8430 

4.9J52 

4.9894 

5.0658 

5.1446 

II 

79 

5.1446 

5.2257 

5.3093 

5.3955 

5.4845 

5.5764 

5-6713 

IO 

80 

5-6713 

5.7694 

5.8708 

5.9758 

6.0844 

6.1970 

6.3138 

9 

81 

6.3138 

6.4348 

6.5606 

6.6912 

6.8269 

6.9682 

7-U54 

8 

82 

7-IT54 

7.2687 

7.4287 

7.5958 

7.7704 

7.9530 

8.1443 

7 

83 

8.1443 

8-3450 

8-5555 

8.7769 

9.0098 

9-2553 

9.5H4 

6 

84 

9.5144 

9.7882 

10.0780 

10.3854 

10.7119 

11.0594 

11.4301 

5 

85 

11.4301 

11.8262 

12.2505 

12.7062 

13.1969 

13.7267 

14.3007 

4 

86 

14.3007 

14.9244 

15.6048 

16.3499 

17.1693 

18.0750 

19.0811 

3 

87 

19.0811 

20.  2056 

21.4704 

22.9038 

24.5418 

26.4316 

28.6363 

2 

88 
89 

28.6363 
57.2900 

3I.24I6 
68.7501 

34.3678 
85.9398 

38.1885 
114.5887 

42.9641 
171-8854 

49.1039 
343-7737 

57.2900 

CO 

I 
O 

60' 

50' 

40' 

30' 

20' 

10' 

0' 

Angle. 

Natural    Cotangents. 

242 


TABLE   99. 


LOGARITHMS    OF    NUMBERS. 


N. 

01234 

56789 

d. 

Prc 

>p.  F 

'arts 

i. 

0 

oooo  3010  4771  6021 

6990  7782  8451  9031  9542 

i 

2 

3 
1  4 
5 
6 

8 
9 

oooo  0414  0792  1139  1461 

3010  3222  3424  3617  3802 
4771  4914  5051  5185  5315 
6021  6128  6232  6335  6435 
6990  7076  7160  7243  7324 

7782  7853  7924  7993  8062 
8451  8513  8573  8633  8692 
9031  9085  9138  9191  9243 
9542  9590  9638  9685  9731 

1761  2041  2304  2553  2788 
3979  4150  4314  4472  4624 
5441  5563  5682  5798  5911 
6532  6628  6721  6812  6902 
7404  7482  7559  7634  7709 
8129  8195  8261  8325  8388 
8751  8808  8865  8921  8976 
9294  9345  9395  9445  9494 
9777  9823  9868  9912  9956 

i 

2 

3 
4 
5 
6 

9 

43 

n 

12,9 

17,2 

21,5 

25,8 
30,1 

34,4 
38,7 

42 

4,2 
8,4 

12,6 

16,8 

21,0 

25,2 
29,4 
33,6 
37,8 

41 

4,1 

8,2 

12,3 
16,4 
20,5 

24,6 

28,7 

32,8 
36,9 

40 

4,0 
8,0 

I2,O 

16,0 
20,0 
24,0 
28,0 

32,0 

36,0 

10 

oooo  0043  0086  0128  0170 

0212  0253  0294  0334  0374 

41 

ii 

12 

15 

16 

18 

0414  0453  0492  0531  0569 
0792  0828  0864  0899  0934 
1139  TI73  I2°6  I239  I27i 
1461  1492  1523  1553  J584 
1761  1790  1818  1847  1875 

2O4I  2O68  2095  2122  2148 
2304  2330  2355  2380  2405 

2553  2577  26oi  2625  2648 
2788  2810  2833  2856  2878 

0607  0645  0682  0719  0755 
0969  1004  1038  1072  1106 
1303  1335  1367  1399  1430 
1614  1644  1673  1703  1732 
1903  1931  1959  1987  2014 

2175  2201  2227  2253  2279 
2430  2455  2480  2504  2529 
2672  2695  27l8  2742  2765 
2900  2923  2945  2967  2989 

38 

35 

32 

30 
28 
26 

25 
24 

22 

i 

2 

3 
4 

! 

9 

39 

3,9 

7,8 
u,7 
15,6 
19,5 
23-4 
27,3 
31,2 
35,i 

38 

3,8 
7,6 
11,4 
15,2 
19,0 

22,8 

26,6 
30,4 
34,2 

37 

3,7 
7,4 
n,  i 
14,8 
18,5 

22,2 

25,9 
29,6 

33,3 

36 

3,6 

7,2 

10,8 
14,4 
18,0 

21,6 

25,2 
28,8 
32,4 

20 

3010  3032  3054  3075  3096 

3118  3139  3160  3l8l  3201 

21 

21 
22 
23 
24 

25 
26 

27 
28 
29 

3222  3243  3263  3284  3304 
3424  3444  3464  3483  3502 
3617  3636  3655  3674  3692 
3802  3820  3838  3856  3874 

3979  3997  4014  4031  4048 
4150  4166  4183  4200  4216 

4314  4330  4346  4362  4378 
4472  4487  4502  4518  4533 
4624  4639  4654  4669  4683 

3324  3345  3365  3385  3404 
3522  3541  3560  3579  3598 
3711  3729  3747  3766  3784 
3892  3909  3927  3945  3962 
4065  4082  4099  4116  4133 
4232  4249  4265  4281  4298 
4393  4409  4425  4440  4456 
4548  4564  4579  4594  4609 
4698  4713  4728  4742  4757 

20 
19 

18 
18 

17 
16 

16 
15 

15 

i 

2 

3 
4 

1 

9 

35 

3,5 

io',5 
14,0 
17,5 

21,0 

24,5 
28,0 

34 

IO,2 

13,6 
17,0 
20,4 
23,8 
27,2 
30,6 

33 

1:1 

9,9 
13,2 
16,5 
19,8 
23,1 
26,4 

32 

il;l 

16,0 
19,2 

22,4 
25,6 
28,8 

30 

4771  4786  4800  4814  4829 

4843  4857  4871  4886  4900 

14 

3i 

32 
33 
34 
35 
36 

37 
38 
39 

'  4914  4928  4942  4955  4969 
5051  5065  5079  5092  5105 
5185  5198  5211  5224  5237 

5315  5328  5340  5353  5366 
5441  5453  5465  5478  5490 
5563  5575  5587  5599  5611 
5682  5694  5705  5717  5729 
5798  5809  5821  5832  5843 
5911  5922  5933  5944  5955 

4983  4997  Son  5024  5038 
5119  5132  5145  5159  5172 
5250  5263  5276  5289  5302 

5378  5391  5403  54i6  5428 
5502  5514  5527  5539  5551 
5623  5635  5647  5658  5670 
5740  5752  5763  5775  5786 
5855  5866  5877  5888  5899 
5966  5977  5988  5999  6010 

14 

13 
13 
13 

12 
12 
12 
II 
II 

i 

2 

3 
4 
5 
6 

9 

31 

9,3 
12,4 

15,5 
18,6 
2.  ,7 

24,8 
27,9 

30 

30 
6  o 
90 

12  O 

15  0 

180 

21  O 

24  o 

270 

29 

54 

11,6 
14,5 
17,4 
20.3 
23,2 

28 

2,8 

5,6 
8,4 

11,2 
14,0 

16,8 
19,6 

22,4 
25,2 

40 

6021  6031  6042  6053  6064 

6075  6085  6096  6107  6117 

II 

4i 
42 

43 
44 
45 
46 

47 
48 
49 

6128  6138  6149  6160  6170 
6232  6243  6253  6263  6274 
6335  6345  6355  6365  6375 
6435  6444  6454  6464  6474 
6532  6542  6551  6561  6571 
6628  6637  6646  6656  6665 
6721  6730  6739  6749  6758 
6812  6821  6830  6839  6848 
6902  6911  6920  6928  6937 

6180  6191  6201  6212  6222 
6284  6294  6304  6314  6325 
6385  6395  6405  6415  6425 
6484  6493  6503  6513  6522 
6580  6590  6599  6609  6618 
6675  6684  6693  6702  6712 
6767  6776  6785  6794  6803 
6857  6866  6875  6884  6893 
6946  6955  6964  6972  6981 

10 
10 
10 
10 
10 

9 
9 
9 
9 

i 

2 

3 
4 

i 

i 

9 

27 

2,7 

5,4 
8,1 
10,8 
13,5 
16,2 
18,9 

21,6 

26 

2,6 

10,4 
i3,o 
15,6 
18,2 

20,8 

23,4 

25 

2,5 

5,o 

7,5 
10,0 
12,5 

i7ls 
20,0 

22,5 

24 

2,4 
4,8 

& 

I2,O 

14,4 

16,8 
19,2 

21,6 

50 

6990  6998  7007  7016  7024 

7033  7042  7050  7059  7067 

9 

N. 

01234 

56789 

d. 

Prc 

>p.  1 

'art! 

i. 

SMITHSONIAN  TABLE*. 


243 


LOGARITHMS    OF    NUMBERS. 


TABLE   99 


N. 

01234 

56789 

d. 

Prop.  Parts. 

50 

5i 
52 
53 
54 
55 
56 

57 
58 
59 

60 

61 
62 
63 
64 

65 
66 

67 
68 
69 

70 

7i 
72 

73 
74 
75 
76 

9 

79 
80 

81 
82 
83 
84 

85 
86 

87 
88 
89 

90 

9i 
92 

93 
94 
95 
96 

97 
98 
99 

100 

6990  6998  7007  7016  7024 

7033  7042  7050  7059  7067 

9 

8 
8 
8 
8 
8 
8 
8 
7 
7 

i 

2 

3 

4 
5 
6 

9 
i 

2 

3 

4 

S 
I 

9 
i 

2 

3 

4 

9 

i 

2 

3 

4 

9 

23 

$ 

6,9 
9,2 
«,5 
13,8 
16,1 
18,4 
20,7 

18 

1,8 
3,6 
5,4 

7,2 

9,o 
10,8 

12,6 

14,4 
16,2 

13 

1,3 

2,6 

3,9 

5,2 

6,5 
7,8 
9,1 
10,4 

«,7 

8 

0,8 
1,6 
2,4 
3,2 
4,0 
4,8 
5,6 
6,4 

7,2 

22 

2,2 

8 

8,8 

11,0 

13,2 
15,4 
17,6 
19,8 

17 

i,7 
3,4 

i:« 

8,5 

10,2 

11,9 
13,6 
15,3 

12 

1,2 
2,4 

3,6 
4,8 
6,0 

II 

10,8 

7 

o,7 
1,4 

2,1 
2,8 

3,5 

4,2 

4,9 
5,6 
6,3 

21 

2,1 

e 

10,5 

12,6 

\i% 
18,9 

16 

1,6 

$ 
lit 

9,6 

11,2 
12,8 
14,4 

11 

1,1 
2,2 

3,3 
4,4 

l:l 
l:l 

9,9 

6 

0,6 

1,2 

1,8 

2,4 

% 
tl 

5,4 

20 

2,0 

4,0 
6,0 
8,0 

10,0 
12,  0 

14,0 

16,0 
18,0 

15 

i,5 
3,o 

8 

7,5 
9,o 
io,5 

12,0 

13,5 

10 

1,0 

2,0 

3,o 
4,o 
5,o 
6,0 
7,o 
8,0 
9,o 

5 

o,5 

1,0 

i,5 

2,0 
2,5 

3,0 
3,5 
4,0 
4,5 

19 

1,9 
3,8 
5,7 
7,6 
9,5 
11,4 
13,3 
15,2 
I7,i 

14 

i,4 

2,8 

% 

7,o 

8,4 
9,8 

11,2 
12,6 

9 

°:l 
1:1 

4,5 

8 
K 

4 

o,4 
0,8 

1,2 

1,6 

2,0 

n 

i:l 

7076  7084  7093  7101  7110 
7160  7168  7177  7185  7193 
7243  7251  7259  7267  7275 
7324  7332  7340  7348  7356 
7404  7412  7419  7427  7435 
7482  7490  7497  7505  7513 
7559  7566  7574  7582  7589 
7634  7642  7649  7657  7664 
7709  7716  7723  7731  7738 

7118  7126  7135  7143  7152 
7202  7210  7218  7226  7235 
7284  7292  7300  7308  7316 
7364  7372  7380  7388  7396 
7443  7451  7459  7466  7474 
7520  7528  7536  7543  7551 
7597  7604  7612  7619  7627 
7672  7679  7686  7694  7701 
7745  7752  776o  7767  7774 

7782  7789  7796  7803  7810 

7818  7825  7832  7839  7846 

7 

7853  7860  7868  7875  7882 
7924  7931  7938  7945  7952 
7993  8000  8007  8014  8021 
8062  8069  8075  8082  8089 
8129  8136  8142  8149  8156 
8195  8202  8209  8215  8222 
8261  8267  8274  8280  8287 
8325  8331  8338  8344  8351 
8388  8395  8401  8407  8414 

7889  7896  7903  7910  7917 
7959  7966  7973  7980  7987 
8028  8035  8041  8048  8055 
8096  8102  8109  8116  8122 
8162  8169  8176  8182  8189 
8228  8235  8241  8248  8254 
8293  8299  8306  8312  8319 
8357  8363  8370  8376  8382 
8420  8426  8432  8439  8445 

7 

7 
7 
7 
7 
7 
6 
6 
6 

8451  8457  8463  8470  8476 

8482  8488  8494  8500  8506 

6 

8513  8519  8525  8531  8537 
8573  8579  8585  8591  8597 
8633  8639  8645  8651  8657 
8692  8698  8704  8710  8716 
8751  8756  8762  8768  8774 
8808  8814  8820  8825  8831 
8865  8871  8876  8882  8887 
8921  8927  8932  8938  8943 
8976  8982  8987  8993  8998 

8543  8549  8555  8561  8567 
8603  8609  8615  8621  8627 
8663  8669  8675  8681  8686 
8722  8727  8733  8739  8745 
8779  8785  8791  8797  8802 
8837  8842  8848  8854  8859 
8893  8899  8904  8910  8915 
8949  8954  8960  8965  8971 
9004  9009  9015  9020  9025 

6 
6 
6 
6 
6 
6 
6 
6 
5 

9031  9036  9042  9047  9053 

9058  9063  9069  9074  9079 

5 

9085  9090  9096  9101  9106 
9138  9143  9149  9154  9159 
9191  9196  9201  9206  9212 
9243  9248  9253  9258  9263 
9294  9299  9304  9309  9315 
9345  9350  9355  9360  9365 
9395  94oo  9405  94io  9415 
9445  9450  9455  946o  9465 
9494  9499  9504  9509  9513 

9112  9117  9122  9128  9133 
9165  9170  9175  9180  9186 
9217  9222  9227  9232  9238 
9269  9274  9279  9284  9289 
9320  9325  9330  9335  9340 
9370  9375  938o  9385  9390 
9420  9425  9430  9435  9440 
9469  9474  9479  9484  9489 
95i8  9523  9528  9533  9538 

5 
5 
5 
5 
5 
5 
5 
5 
5 

5 

9542  9547  9552  9557  9562 

9566  9571  9576  9581  9586 

959°  9595  9600  9605  9609 
9638  9643  9647  9652  9657 
9685  9689  9694  9699  9703 

973i  9736  974i  9745  9750 
9777  9782  9786  9791  9795 
9823  9827  9832  9836  9841 
9868  9872  9877  9881  9886 
9912  9917  9921  9926  9930 
9956  9961  9965  9969  9974 

9614  9619  9624  9628  9633 
9661  9666  9671  9675  9680 
9708  9713  9717  9722  9727 

9754  9759  9763  9768  9773 
9800  9805  9809  9814  9818 
9845  9850  9854  9859  9863 
9890  9894  9899  9903  9908 
9934  9939  9943  9948  9952 
9978  9983  9987  9991  9996 

5 
5 
5 
5 
5 
4 
4 
4 
4 

oooo  0004  0009  0013  0017 

0022  0026  0030  0035  0039 

4 

N. 

01234 

56789 

d. 

Prop.  Parts. 

SMITHSONIAN  TABLES. 


244 


TABLE   1OO. 

BIGELOW'S  STANDARD  SYSTEM  OF  NOTATION  AND 

FORMULA. 

Metre  =  39.37011  inches  ;  log.  [1.5951666]. 

Kilogramme  =  15432.350  grains  troy  ;  log.  [4. 1884321]  . 

Gravitation  constants,  g  =  980.60  ;  k  =  .00260. 

A  cubic  cm.  of  dry  air  at  o°  C.,  pressure  760  mm.,  weighs  0.00129305 
gramme;  log.  7.1116153  —  10. 

A  cubic  cm.  of  saturated  aqueous  vapor  at  o°  C.  weighs  .00080427 
gramme;  log.  6.9054019 — 10. 

A  cubic  cm.  of  pure  water  at  maximum  density  weighs  i.oooo  gramme  ; 
log.  [o]. 

A  cubic  cm.  of  mercury  at  o°  C.  weighs  13.5958  grammes  ;  log. 
[1.13340]. 

Height  of  homogeneous  atmosphere,  7991  metres,  26217  feet- 
Equivalent  weight  of  atmosphere,  14.661  pounds  per  square  inch  or 
2111.23  pounds  per  square  foot ;  1033.3  grammes  per  square  centimetre  or 
10333  kilogrammes,  log.  [4.01422]  per  square  metre. 

There  are  three  separate  methods  of  expressing  pressure  values  in 
meteorology  :  First,  in  units  of  weight  as  given  above  ;  second,  in  units  of 
force,  101.324  (metric)  or  10^0.63  (English),  and,  third,  in  units  of  the 
height  of  the  column  of  mercury  that  corresponds  to  one  standard  atmos- 
phere, i.  c.  76  centimetres  or  29.921  inches. 


245 


0 

a 

k; 

0 
O4 

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to  rO 
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0 

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CO 

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8 

6 

0   0 

7  7 

IOCO 

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VO  vO 

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ON  *H  '^    vo 
ON  rOCO       rO 
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0 

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LO      ot     CO       to    v£ 
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•4    vb    vo'     &    c 

0.4342945 

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'bfl 

H 

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1 

e 

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Standard  temperatl 

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§« 

M     <N 

to  n 
M    M    to  O 

8 

ON  CO 
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O   O 

0 

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Logarithms. 

6.8041525 
0.9914919 
7.41497-10 

S 

0 

o  o 
1    1 

LOCO 

CO  CO 
CN    rO 
vO  \D 

CO      I-H 

0      0 

7  7 

8LO  LO      ^O 
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M           M         LO        VO         f< 

LO       iO     LO       ON     C 

0.4342945 

o 
'C 

0) 

1 

s" 

2 

3 

Standard  Temp 

Numbers. 

i  kilogram  

M  vS*  ON  O 

8 

0.00007292 
0.00014584 

"2,9 

X     *"*""         ^^ 

iO  ON  to     tO 

•    i/^  rO      O 

^  ON  q     q 

^t  04    O        O 

oo                   LO    c 

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a    8|   S  1 

§   §1    ?  S 

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Length  
10.  Radius  of  earth,  J?  .  .  . 
ii.  Gravity,  g0  
12.  Coefficient  in  lat.,  k.. 

1  13.  Coefficient  in  alt.,  / 

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hH 

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T^-  CO         lO       ^  ON      O               1~l    O    *O      f^-         CO            M            O         cO    VO                   Tt*                CO            co          ^"      CO          ^ 
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a 

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z 

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249 


TABLE  1O1. 

LIST  OF   METEOROLOGICAL  STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.      The  height  refers  to  the 
cistern  of  the  barometer  when  that  is  known.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

NORTH  AMERICA. 

CANADA. 
Farther  Point. 

48°  ii'N 

68°  I97W 

20 

6 

Frederickton  

4c      cy 

66     16 

164 

so 

°Halifax  

44      sQ 

6}     ri 

Q7 

2Q 

Kingston  .        

44.      I  1 

2     -J 

76       2Q 

28s 

87 

°Montreal      

4C         7Q 

•7T.         -5C 

•*"3 

l87 

S7 

Parry  Sound  

4C          IQ 

80       o 

6-^s 

IQ1 

°Prince  Albert  

C7         JO 

106       o 

14^2 

4l6 

Qu'Appelle  

c,  i      -jo 

IO^      47 

21  IS 

64d 

°Quebec.              

46     48 

71       ii 

2Q6 

QO 

°Saint  John.           

4c      17 

66        4 

7° 

21 

°Sulphur  Mt.  (Banff)  

SI        IO 

IIS      ^S 

7484 

228l 

Sydney  . 

46     10 

60     i  o 

-2C 

I  i 

°Toronto 

AT.       4O 

70      24 

7c:o 

IO7 

°Victoria  

48       24 

12^       IQ 

7O 

21 

Westminster  

4Q      11 

1  22       S4 

^^o 

IOO 

°Winnipeg.          .    .        

4Q         Cl 

Q7        7 

?6o 

212 

Woodstock  

41        8 

80      47 

080 

2QQ 

There    are    55    stations    of    the 
second  order  in  Canada. 

GREENLAND,  ICELAND,  AND 
FAROE  ISLANDS. 
(Danish  Stations.) 

GREENLAND. 
Angmagsalik 

6s     16  N 

17       1\  W 

I  OJ. 

•22 

Godthaab  

64     10 

SI    •  4"^ 

•*o 

Q 

Ivigtut  . 

6  1       12 

48     10 

16 

c 

Jacobshavn  

6q     ii 

SI         2 

41 

IT. 

Upernivik  

72      47 

56       7 

44 

IT. 

ICEIvAND. 

Beruf  jord  

64     4o 

14       IQ 

SQ 

18 

Grimsey  (  Akureyi)  

66     11 

18       o 

22 

7 

Stykkisholm  

;:       «W 

6s       s 

22      46 

^7 

ii 

Vestmanno  

61     26 

2O       IS 

21 

7 

FARO   ISLANDS. 

Thorshavn  

MEXICO,    CENTRAL   AMER- 
ICA, AND  WE=>T  INDIES. 

0  Basseterre  (St.  Kitts). 

62       2 
17     18  N 

6    45 
62     4^    W. 

30 
2Q 

9 

Q 

0  Bridgetown  (Barbados)  
Camp  Jacob  (Guadelope) 

!3       4 
16       i 

59    37 
61     41 

30 
I74Q 

9 
533 

°Cienfu  egos  (Cuba)    
Fort  de  France  (Martinique)..... 
Grand  Turk  (Turks  Island)  ... 
Guanajuato  (Mexico)  

22       II 

14      36 
21       21 
21         O 

80    33 
61      5 
71       7 
loi     15 

52 
13 
II 
6640 

16 
4 
3 
2024 

Guatemala  

14     VI 

QO      'll 

4888 

1490 

Hamilton  (Bermuda)  ....    

12       l6 

64      46 

14 

4 

0  Havana  (Cuba)  ,  

21         Q 

82      21 

57 

17 

0  Kingston  (Jamaica) 

17       ^8 

76      48 

286 

87 

250 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101 


MEXICO,  CENTRAL  AMERICA, 
AND  WEST  INDIES  (Cont'd). 

Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

Leon  (Me  xico)  

21°     lf  N 

101°  4i7  W 

58qq 

I7Q8 

Mazatlan    (Mexico)  

27         II 

106     25 

25 

8 

°Mexico    (Mexico)  

^6     ** 

IQ       2O 

QQ        8 

7472 

2277 

Nassau   (  Bahamas)  

oc         2 

77      2^ 

Panama  (  Colon  ^. 

927 

7Q      21 

Port  of  Spain    (Trinidad) 

*O 

TO       7^ 

6  1     30 

4O 

12 

Port-au-Prince    (Haiti) 

i(J       OO 
l8        7.4 

72      21 

118 

36 

Puebla  (Mexico) 

IQ         2 

/•      ** 
98      II 

7116 

2l6q 

"Puerto  Principe   (Cuba"). 

ly         * 
21       21 

77      56 

7,52 

IO7 

Roseau  (Dominica).        .        ... 

I  ^      17 

6r     2\ 

25 

8 

Saltillo  (Mexico)           

oc      25 

*5 

100     56 

57QQ 

1645 

°San  Domingo  (San  Domingo). 
°San  Jose  de  Costa  Rico  
°San  Juan  v  Porto  Rico)  
San  Luis  Potosi  (Mexico)  
San  Salvador  (Central  America) 
°Santiago  de  Cuba  (Cuba)  

18    28 
9    56 
18    29 

22        5 

13    44 
IQ     55 

69    53 
84      8 
66      7 
100    59 
89      9 
75     50 

57 
3724 
82 
6200 

2155 
82 

17 
ii35 
25 
1890 

657 

25 

Tacubaya  (Mexico) 

IQ     24 

QQ         12 

7621 

27.2^ 

Vera  Cruz  (Mexico)  

IQ      12 

96      8 

27, 

7 

°Willemstad  (Curacao) 

12         6 

68     56 

yc 

27. 

Zacatecas  (Mexico)  .               .    . 

22      47 

IO2      30 

8015 

2447 

UNITED   STATES. 
°Abilene  

12      21  N. 

99    40  W. 

1738 

53° 

0  Albany 

4.2      'IQ 

77.      4C 

Q7 

7O 

°Alpeua 

4.C         c 

ST.      10 

609 

1  86 

°Amarillo.                    .        ... 

7,5         17 

101     50 

3676 

1  1  20 

°Asheville  .                 .  .            .      . 

7?         7.6 

82       12 

22SS 

687 

0  Atlanta  

77        dC 

84      21 

11  74 

358 

°Atlantic  City  

7.Q      22 

74     25 

52 

s 

16 

°Augusta  

11      28 

8l      54 

180 

55 

°Baltimore.    

IQ     18 

76     17 

123 

17 

°  Binghatnton 

4.2         8 

75      55 

875 

267 

0  Bismarck 

46      47 

IOO       7.8 

l6?4 

5  IO 

°Block  Island 

4.1     IO 

71      T.6 

26 

8 

°Blue  Hill 

42      17 

71         7 

640 

IQ5 

°Boise                 

47      77 

116      8 

277,0 

835 

°Boston     

42      21 

71        4 

125 

38 

°Buffalo      

42       53 

78     57, 

767 

234 

°Cairo  

VI      b 

89     10 

356 

108 

°Cape  Henry  

16     56 

76       o 

18 

5 

0  Carson  City 

7Q          IO 

IIQ      46 

472O 

147,  Q 

0  Charleston 

72      47 

7Q      56 

48 

15 

0  Charlotte 

7?         17 

jy     y 

80      51 

77^ 

276 

0  Chattanooga 

7,5            A 

85      14 

7^2 

27,2 

°Cheyenne.          . 

4.1        8 

IO4           48 

6088 

1855 

0  Chicago          ....          

41      5^ 

87      7,7 

823 

•     251 

°Cincinnati        

^Q        6 

84     ^o 

628 

191 

°Cleveland  

41      ^o 

81     42 

762 

232 

°Columbia,  Mo  

^8     57 

92     14 

784 

239 

°Columbia,  S.  C  

Mo 

81       i 

351 

107 

0  Columbus 

7Q     e;8 

81      o 

824 

251 

0  Con  cord 

A-t      12 

71      12 

298 

91 

0  Corpus  Cbristi  .                 ... 

27      4Q 

Q7      25 

20 

6 

251 


TABLE  101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(leet). 

Height  (m.) 

UNITED  STATES  (Continued). 
°Davenport  

A  i°   7r/  N 

Q0°     78r   W 

finfi 

Toc 

°Denver..  

IO5 

°Des  Moines  
°Detroit  

oV     4o 
4r     35 

93     37 

87          7 

o^y  L 
861 

262 

°Dodge       

°o        6 

73° 

*7fic 

°Dubuque  

oi      40 

QO      4A 

"jo(jy 
608 

7°5 

°Duluth  

Aft      A  "I 

uyo 
7o2 

213 

Eagle  (Alaska).. 

4U      4/ 
6  A      A  ft 

141       1  2 

/u^ 

^14 

°Eastport  

66     S;Q 

O/o 
76 

1/D 

°Elkins  

44      04 

78        Cl 

uu    oy 

7Q      /1Q 

/u 

23 

°E1  Paso  

o°     06 

7  T          An 

7762 

OV1 

°Erie  

?*      4/ 

A2         7 

80       t; 

717 

°Escanaba  

AC       xQ 

oo       5 
87       ^ 

713 
612 

*L  / 

187 

°Eureka  

4O      48 

°/       0 
1  24     1  1 

62 

10/ 

°Evansville  

77     ^8 

87       77 

A7T 

Ay 

T7T 

°Farallon  Island  

s/      o° 
77       AO 

°/       OO 
127          O 

4O1 
7.O 

••^o1 

°Fort  Smith  

7  c       22 

QA      2A 

Ow 

/I  C7 

T  7Q 

°Fort  Worth  

OO       *•* 

•jo       A1 

Q7       Is* 

670 

ioy 

°Fresno  

76      A  7 

V/       X0 
I  IQ      AQ 

77O 

IOI 

°Galveston  

2Q       1  8 

iiy      4V 
QA      IO 

OJ^ 
1A 

16 

°Grand  Haven  ... 

A  7         ^ 

86      17 

672 

IQ7 

°Grand  Junction  

4o         0 

7Q               Q 

Io8      77 

4608 

*7J 

IAOA 

°Green  Bay     

oV        y 

A  A         71 

88      o 

6l7 

1  88 

°Harrisburg  

40     1  6 

76      52 

774 

I  IA 

°Havre    

A8      7A 

IOQ      4O 

25O5 

76A 

°Helena    

A6      7A 

112         4 

4  j  jo 

12^7 

°Houghton  

An          'i 

88      74 

668 

A-*oo 
2OA 

°Huron                    

4/          j 

A  A         2T 

08      14 

1306 

708 

°Independence  .... 

6    48 

Il8      12 

7QIO 

oyj 

I  IQ2 

°Indianapolis  

7Q         Aff 

86     10 

822 

iiy^ 

2C  T 

°Ithaca             

A.2      27 

76      2Q 

876 

2cc 

°Jacksonville  .... 

7Q        2O 

8l       7.Q 

47 

1  7 

°Kalispell  

48     10 

114      25 

2Q&5 

QOA 

°Kansas  City  

•3Q             C 

QA      77 

067 

^^4 
2Q7 

°Key  West  

O7           O 

2/1       ?A 

8  1      4Q 

22 

7 

°K.noxville  

7  C         cA 

87      58 

IOO4 

306 

°L,a  Crosse  

-17         AQ 

QI       15 

714 

218 

°Ivander 

A.2       ^O 

Io8      45 

5772 

1677 

°L/ansing      

A.2      A.A 

84      72 

88  1 

iU6/ 
26Q 

°Lewiston  .        

A  6         2^ 

117         2 

757 

271 

0  Lexington        .    . 

3.8         2 

84       7.7. 

Q8Q 

7O  I 

°Lincoln  

4O      4Q 

06      45 

Il8q 

762 

°Little  Rock  

7.4.      A*\ 

Q2             6 

757 

IOQ 

°IvOs  Angeles     ...              .... 

'lA           7. 

V^         ** 

118     15 

77,8 

IO7 

°L/ouisville  ....        

7,8     i«; 

85      45 

525 

*v,9 

1  60 

0L/ynchburg  

7.7       2^ 

7Q        Q 

68  1 

2O7 

°Macon.          .    .                 ' 

7.2       ^O 

87       7.8 

770 

117 

°Marquette  

46       7,4. 

XJ     •* 

87      24 

774 

224 

0  Mem  phis        

-1C             Q 

7.Q7 

121 

0  Meridian  

7,2       21 

88     40 

7,75 

114 

°Milwaukee.        .  .    .  .        

47.          2 

87     54 

68  1 

207 

0  Montgomery     ....        

7.2       27, 

86     18 

227 

68 

°Moorhead.              

46       52 

96    44 

075 

285 

°Mount  Tamalpais.              

7,7       ^6 

122     35 

2375 

724 

°Mount  Weather  

7,Q         4 

77     55 

1726 

526 

°Nantucket     

41      17 

/  /         00 

70       6 

12 

4 

°Nashville  

7,6       IO 

86    47 

546 

1  66 

°New  Haven  

41      18 

72    56 

1  06 

32 

252 


LIST  OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101 


UNITED  STATES  (Continued). 

°New  Orleans   29°  58'  N. 

°New  York ...  40  43 

°Norfolk 36  51 

°Northfield    44  10 

°North  Head 46  16 

°Oklahoma  City 35  26 

°Otuaha 41  16 

°Oswego 43  29 

°Parkersburg 39  16 

°Pensacola 30  25 

0  Philadelphia   , 39  57 

0 Phoenix.             33  28 

°Pike's  Peak 38  50 

°Pittsburg 40  32 

°Pocatello 42  52 

°Port  Huron 43  o 

0  Portland,  Me 43  39 

0  Portland,  Oreg 45  32 

0  Pueblo 38  18 

0  Raleigh 35  45 

°Richmond 37  32 

°Rochester 43  8 

0  Roseburg 43  13 

°Sacramento 38  35 

0  St.  Louis 38  38 

0 St.  Paul 44  58 

0  Salt  Lake  City 40  46 

°San  Antonio    29  27 

°San  Diego 32  43 

°Sandusky 41  25 

°San  Francisco 37  48 

0  Santa  Fe 35  41 

°Sault  Ste.  Marie 46  30 

°Savannah. 32  5 

°Scranton 41  24 

°Seattle 47  38 

°Shreveport  .    32  30 

0  Spokane 47  40 

0 Springfield,  111 39  48 

°Spriugfield,  Mo ....  37  12 

0  Syracuse 43  2 

°Tacoma 47  16 

°Tampa .  27  57 

°Tatoosh  Island 48  23 

°Taylor 30  35 

°Toledo 41  40 

°Topeka    39  3 

°Valentine 42  50 

0  Vicksburg 32  22 

0  Washington  City. .              38  54 

0  Wichita    37  41 

0  Williston 48  9 

0  Wilmington 34  14 

°\Vytheville 36  56 

°Yankton 42  54 

(About  2,500   rainfall  stations  in 
the  United  States.) 


Latitude. 


Longitude 

from 
Greenwich. 


90' 

74  o 

76  17 

72  41 

124  4 

97  33 

95  56 

76  35 

Si  36 

87  13 
75 

112 


80 


'  W. 


9 

o 

2 
2 

1 12  29 

82  26 

70  15 

122  43 

104  36 

78  37 

77  27 

77  42 

123  20 

121  30 
90  12 

93  3 

in  54 

98  28 

117  10 

82  40 

122  26 

i'5  57 

84  21 

81  5 

122  20 

93  40 

117  25 

89  39 
93  18 

76  10 

122  23 

82  27 

124  44 
97  20 

83  34 
95  4i 

100  32 

90  53 

77  3 
97  20 

103  35 

%  5l 

97  28 


Height 

(feet) 


5i 
3i4 

91 
876 

211 
1214 
1105 

335 

638 

56 

117 

1108 

I4I34 
842 


638 

4685 
376 
144 
523 
5i8 
69 
567 
837 

4366 
701 

87 
629 

155 


l°25 
249 


1324 

597 
213 

34 
86 

583 
628 

998 

2598 

247 

112 

1358 

1875 

78 

2293 


Height  (m.) 


16 

96 

28 

267 

64 

370 

337 

IO2 

194 
17 
36 

4308 

257 

]366 

I94 

31 

47 
1428 

H5 

44 

159 

21 

173 
255 

214 

26 

192 

47 
2138 

187 

20 
245 

37 

76 

588 

196 

4°3 
182 

65 

10 

26 

178 

191 

305 

792 

75 

34 

414 

57i 

24 

699 

376 


253 


101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

SOUTH  AMERICA. 

Andalgala  (Argentine).     .    .  . 

27°    *o'  S 

66°  26'  W 

3688 

1  124 

Aracaju  (Brazil)  

IO      SS 

•?7              A 

14 

Arequipa  (Peru)    

l6       22 

7  r       22 

8060 

2/1  C7 

°Asuncion  (Paraguay) 

25     18 

C.7        AQ 

•JAA 

IOS 

Bahia  Blanca  (Argentine) 

^8      /K 

62        I  I 

72 

22 

Bogota  (U.  S.  of  Colombia)    
°Buenos  Aires  (Argentine)  
Caldera  (Chile).. 

4    35 
34    36 

27         T. 

74     14 

58      22 

7O       S^ 

8579 
72 
Q2 

2615 
22 
28 

Cape  Pembroke  (Falkland  Islands 
Caracas  (Venezuela) 

5i     4t 

IO        T.  I 

57     42 
66     -^^ 

70 
7J.72 

21 
I  Od.6 

Catamarca  (Argentine) 

28    28 

6c     cc 

I7JJ8 

c,dc 

Cayenne  (French  Guiana)  

4    s6 

52       IQ 

20 

6 

Ceres  (Argentine)  

2Q       ^S 

62       o 

338 

IO} 

Chaco  (Paraguay)  

2^       2^ 

S8      2S 

^6r 

110 

Concordia  (Argentine)  

^T       2^ 

s8      4 

200 

or 

Coquimbo  (Chile)  

2Q       ^5 

71       22 

85 

26 

°Cordoba  (Argentine)  

^[       2S 

64.       12 

1440 

439 

Corrientes  (Argentine)  

28      27 

sS    so 

2IO 

64 

El  Misti  (Peru)  : 
Summit  station  
Mt.  Blanc  station  

|  16     16 

71    30 

(  19200 

1  IS70O 

58S2 
4785 

Georgetown  (  British  Guiana)  .... 
Iquique  (Chile).  .        

6    49 

2O       12 

56     10 
70      II 

0 

30 

o 

9 

Isla  Chaiiaral  (Chile)  ... 
Islote  de  los  Evanjelistas  (Chile)  . 
L/a  Plata  (Argentine)      

29         I 
52       24 

Mcc 

7i     37 
75       6 
S7      56 

157 
174 
60 

48 

53 
18 

Lima  (Peru)       

16      4 

77        ^ 

520 

158 

Montevideo  (Uruguay) 
Paramaribo  (Dutch  Guiana)  .... 
Parana  (  Argentine)  
Potosi  (Bolivia)            .  .        

34    52 
5     49 
3i     41 
rq     18 

56       12 

55       9 
60     31 

6s      2S 

96 
o 

256 

13287 

29 

0 

78 
4050 

Punta  Arenas  (Chile)               

c  ^      10 

7O      S4 

Punta  Carranza  (  Chile)  
Punta  Galera  (Chile)           

35     36 
40       i 

72      38 
7-1     44 

1  08 

I2S 

fs 

Quito  (Fvcuador)  
Rio  de  Janeiro  (Brazil)  
Rio  Grande  do  Sul  (Brazil  )  
Rosario  ^Paraguay)  
San  Juan  (Argentina) 

o     14 
22     54 
32       9 

27     27 

7  I         T.  -> 

78     32 
43     i° 
52       3 
57       2 
68     v 

9337 

2IO 

7 

21  iQ 

2846 
64 

652 

Santa  Cruz  de"  la  Sierra  (Bolivia)  . 
Santiago  (Chile) 

17        50 

-\-i      27 

"0          ^L 

63       o 
7O     41 

1703 

5  '9 

Sao  Paulo  (Brazil)  
Torre   do   Recife    (Pernambuco, 
Brazil)  

23     33 
8      4 

46     38 
34     53 

a477 

97 

755 
3° 

Valparaiso  (Chile)    
Villa  Colon  (Uruguay)  

33       i 
34     So 

7i     38 
56     19 

134 

134 

4r 
4i 

EUROPE. 

AUSTRIA-H  CJNGARY. 
°Arco  

45°  55'  N. 

10°  53X  E. 

289 

88 

°Aussig  a   d   Kibe 

CO      40 

14         2 

485 

148 

°Bielitz     .•  

49    49 

19       3 

1125 

343 

°Bruck  a.  d.  Mur  

47     25 

15     15 

1604 

489 

0  Briinn   

49     I2 

16     36 

807 

246 

°Bucheben     

47       S 

12     58 

3947 

1203 

°Budapest 

47      ^o 

IQ         2 

369 

112 

254 


LIST   OF    METEOROLOGICAL  STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101, 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

AUSTRIA-HUNGARY  (Cont'd). 

47°  44'  N. 

18°  54r  E. 

22QO 

608 

°Dollach 

46     58 

12      54 

•17  CQ 

1024 

°G6rz.        .                  .    . 

AC       en 

T-2         ^17 

^08 

Q4 

°Graz                 

47         4 

15        28 

121  1 

^60 

°Gries  b.  Bozen   

4/         4- 
46      ^O 

II         2O 

QI  5 

27Q 

Gyerty6-Szt.  Miklos  
Hereny     

4"      6^ 

46    43 

47      l6 

25        3f 

16    -^6 

2670 

744 

8f4 

227 

°Innsbruck  

47      1  6 

II      24 

l88o 

1:77 

°Klagenf  urt  

4.6      7,7 

J4      l8 

1476 

45O 

°Krakau  

5O        4 

IQ       ^7 

722 

22O 

°Kremsmiinster  

48      4 

14      8 

I26o 

384 

°Lesina 

4-2         JO 

16    26 

62 

IQ 

°IvUssin  piccolo 

44      ^2 

14    28 

IO 

7 

°Marburg  

46      7,4 

15      ^Q 

810 

247 

°Mariabrunn  . 

W»      Of 

48      12 

A0      OV 
ID      14 

751 

22Q 

Nagyszeben  

45      47 

24        Q 

/Ox 
1^58 

415 

°Obir  (Berghaus)  

46     "*o 

H2Q 

67l6 

2O44 

°Obir  (Hannwarte)  

4^       0^ 

46     ^o 

14      2Q 

7O2I 

2140 

°O-Gyalla  

47      5*. 

18     12 

•764 

III 

°Osielec  

4Q     41 

IQ     47 

1^78 

42O 

Pecs  

Oft        ^i 

4o       4 

18    14 

4QQ 

152 

0  Pelagosa  

42      7.\ 

16     16 

^O2 

Q2 

°Prag  (Petrinwarte)  

SO         5 

14     24 

1066 

325 

°Prag  (Sternwarte)  

co       5 

14      25 

646 

197 

°Prerau  . 

4Q      27 

17      27 

672 

2O5 

°Rothholz 

47      2T> 

II      48 

1758 

5^6 

°Schmittenhohe 

47      2O 

12      44 

VO0 
645O 

1966 

°Sonnblick 

47        I 

12      57 

10193 

^106 

°St.  Katharein  a.  d.  Lemming  
°St.  Pollen 

47     28 

48      12 

15     10 

15      ^7 

2083 
8qq 

635 

274 

°Tarnopol        .                    ... 

AQ       'I'l 

25      -16 

IO46 

7IQ 

°Tragoss  

47      ^1 

15        5 

2477 

Turkeve   

47        7 

2O     45 

288 

88 

Ungvar  

46     ^6 

22      l8 

42O 

128 

°\Veiswasser  ... 

SO       ^O 

14      48 

075 

285 

°Wien  

48    15 

16    21 

666 

203 

0  Wiener  Neustadt 

47      4Q 

16     15 

886 

270 

°Zagreb 

45      4Q 

15      5Q 

C7I 

162 

°Zell  am  See 

47      10 

12      48 

252^ 

769 

Zsombolya  

4.tr     47 

2O     4^ 

269 

82 

164  stations  of    second  order  in 
Austria.     . 

BELGIUM. 
Arlon  

4Q     4O   N 

5      48    E 

I4SO 

442 

°Bruxelles  

CQ         51 

4.       22 

I^I 

4° 

Furnes  

51        4 

2       40 

20 

6 

°Liege  

CO      "17 

C       74 

246 

75 

Maeseyck  

51         6 

5     48 

lie 

35 

°Ostende  

ci      14 

2      55 

2^ 

7 

°Uccle.    .    ... 

5O     48 

4      22 

^28 

IOO 

BRITISH  ISLES. 
0  Aberdeen  

57     10  N. 

2      6    W. 

46 

14 

oArmagh                                     

54     2I 

6    39 

I96 

60 

°Ben  Nevis                    

56    48 

5      ° 

4405 

T343 

255 


TABLE  101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

BRITISH  ISLES  (Continued). 
°Bidston 

C7°    24'  N 

^°      4X  W 

1  88 

r7 

Deerness,  Orkney  Islands  
°Falmouth 

58      56 
CQ          Q 

2     45 

S         A 

1  60 
167 

o/ 

49 

r  T 

Fahnouth  (Pendennis  Castle)  .  .  . 
Fleetwood   .    ... 

50      8 
c-i     c6 

5      3 
•i       i 

o 
o 

OA 
0 

o 

0  Fort  William....                         .    . 

S6     4Q 

S        7 

•IT 

IO 

°Glasgow     

ce      e-i 

4     18 

I  80 

cc 

0  Greenwich 

SI      28 

o      o 

ISS 

DO 

47 

Holyhead  (Harbour  office) 

C7         l8 

47Q 

S7 

17 

°Kew. 

OO       A~ 

SI     28 

O      IQ 

O/ 

18 

6 

London  (Westminster) 

CT         -IQ 

o      8 

76 

21 

Malin  Island 

CC         2\ 

7      24 

2  -IQ 

7O 

0  Oxford 

C  £        46 

i     16 

-oir 

208 

6l 

Scilly  Islands    St  Mary's 

Ol      V* 

AQ        S6 

6     18 

6s 

2O 

Shield    North 

cc         o 

I      27 

o 

o 

0  South  port 

C7         7.Q 

2      SQ 

-57 

II 

°Stonyhurst  College  

ST.        SI 

2      28 

37S 

114 

Stornoway 

s8    ii 

6      22 

2Q 

Sum  burgh  head 

SQ      SI 

I      17 

126 

^8 

°Valencia 

si     s6 

IO      IS 

•JQ 

Yarmouth 

S2      17 

3    -r-v 
I          4^    E 

IO 

•7 

Number   of    stations   of  second 
order,    88    (climatological    sta- 
tion-). 
Stations  not  of  the  first  order  are 
stations  of  the  Meteorological 
Council,  having   anemograph, 
thermograph,      or     barograph 
records. 
(About  2,000  rainfall  stations.) 

DENMARK. 
Bogo         .        ... 

S4     SS  N. 

12        4  E. 

87 

27 

Fano  .              

SS      27 

8     24 

18 

6 

Hammershus  

cc      17 

14     "*8 

4Q 

IS 

Herning       

S6      8 

8     58 

IPS 

SQ 

Kjobenhavn  

cc     41 

12       ^6 

44 

17 

Samso   .            

CC        CQ 

10     ^6 

66 

20 

Skagen               .              

cry     44 

10      ^8 

IO 

a 

Vamdrup  .  . 

cc     2*\ 

Q       l8 

1^1 

4° 

Vestervig 

S6     47 

8      20 

82 

2S 

131  climatological  stations. 
The  above  stations  are  denoted  in 
Meteorologisk  Aarbog  as  "  sta- 
tions principales.  " 

NORWAY  AND  SWEDEN. 
°  Bergen   Norway. 

60     23  N. 

s    21  E. 

72 

22 

Bod  6    Norway 

67      17 

14      24 

67 

21 

Carlshamn    Sweden 

s6     10 

14     S2 

41 

17 

°Christiania,  Norway  
Christiansund    Norway 

59    55 
6-1       7 

10    43 

7     4S 

82 

75 

25 

2T, 

Dovre    Norway  . 

f 

62      s 

Q       7 

211^ 

644 

Floro,  Norway  

61     36 

5       2 

2 
26 

8 

Haparanda   Sweden 

6s      SO 

24        Q 

^o 

Q 

Hernosand   Sweden   . 

62     ^8 

17      S7 

4Q 

15 

Skudesnes   Norway                   .  .    . 

SQ        Q 

5     16 

12 

4 

256 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101 


I 

Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

NORWAY  &  SWEDEN  (Cont'd). 
Stockholm   Sweden  

59°  2i/N. 

1  8°     4'  E. 

144 

44 

°Trondhjem,  Norway  

63     26 

IO       IS 

70 

21 

°Upsala,  Sweden  

59     51 

17     l8 

79 

24 

36   stations  of   second   order  in 
Norway. 
38  stations  of   second   order   in 
Sweden. 

FRANCE. 

Bagneres-de-Bigorre  
Besancon                      ... 

43       4N. 

47      15 

o      9  E. 

c      59 

1795 
IO2O 

547 
in 

Bordeaux   ....        ...          

44     5O 

o     31  W 

241 

74 

Brest  

48     2* 

4     10 

2ii 

65 

Chamonix  

AC      cc 

H     o»» 

7         2  E 

1406 

10^8 

Cherbourg    

40         -2Q 

I     38  W. 

47 

I  ! 

Dunkerque  

SI          2 

2       22  E 

23 

7 

L/angres    .... 

47      S2 

=;     20 

1529 

466 

°Lyon.          .      ..  

4S      ^l 

4    47 

981 

299 

°Marseille  

41      ^8 

5       21 

246 

75 

Mont  Blanc  (Grand  Mulcts)  
Mont  Blanc  (I/es  Bosses). 
°Mont  Ventoux  

o      o 
o      o 
44     Io 

0         O 

o      o 
5     16  E. 

9911 
14301 

6234 

3021 

4359 
1900 

Nantes 

47      15 

i     11  W 

115 

41 

Nice 

A\       47 

7     18  E 

1  115 

14O 

°Paris  (Central  Meteo.  Bureau)... 
0  Paris  (Pare  Saint  Maur) 

HO       HO 
48       52 
48      4Q 

/     AU  **• 

2       18 
2       TO 

105 

161 

32 

49 

0  Paris  (Eiffel) 

t|AJ          C|.vj 

48      52 

*       O'-' 
2       l8 

1027 

HI 

Paris  (Montsouris) 

48      49 

2      2O 

256 

78 

0  Perpignan          .                   

42      42 

2       51 

ios 

72 

°Pic  du  Midi  de  Bigorre  

42      56 

OO 
0         8 

9l8o 

2859 

Puy  de  Dome  (Plaine).  
°Puy  de  Dome  (Sommet)  

45    46 

45      46 

3       5 

2      57 

1273 

4811 

388 

1467 

Sainte-Honorine-du-Fay  
°Toulouse.             

49      5 
47     77 

o     30 

I    26 

387 

616 

118 
194 

GERMANY. 

0  Aachen  (Prussia) 

50     47  N 

6       5  E. 

CC7 

169 

Ansbach  (  Bavaria)          

49      l8 

lo     14 

1157 

414 

Altenberg  (Saxony)         ...        ... 

co     46 

11     46 

2481 

756 

Augsburg  (Bavaria  
Bad  Elster  (Saxony)  

48      22 
50     17 

10     54 

12      15 

1639 

1644 

499 
501 

Bamberg  (Bavaria)      

49      51 

IO      51 

941 

288 

Bautzen  (Saxony)  
Bayreuth  (Bavnria)  

51      II 
49     57 

14      26 
II      14 

693 
1178 

211 

359 

Berlin  (Prussia) 

52      TO 

1  1       21 

161 

49 

Borkum  (  Prussia)  

51      15 

6     40 

14 

10 

°Bremen.              

51        5 

8     48 

52 

16 

Breslau  (Prussia) 

51        7 

17         2 

482 

147 

°Brocken  (Prussia) 

OL           I 

51      48 

IO      17 

1766 

1148 

Bromberg  (Prussia)    . 

51      8 

O/ 

18       o 

144 

44 

°Chemnitz  (Saxony)  
Dresden  (Saxony)            .  .    . 

50     50 
51         2 

12     55 
11     44 

1039 
191 

317 
119 

°Erfurt  (  Prussia)    

50     58 

II       4 

7?8 

219 

Fichtelberg  (Saxony)  

5O      26 

12     57 

3986 

1215 

Freiberg  (Saxony)  

5O     55 

13     21 

1336 

407 

°G6rbersdorf  (Prussia) 

CQ     41 

16     14 

1868 

569 

257 


TABLE  101. 


LIST  OF   METEOROLOGICAL  STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


GERMANY  (Continued). 
°  Grosser  Relchen  (Alsace)    

Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

47°  53'  N. 
53     33 
54     10 
47    44 
48    43 
47     48 
50      4 
49     27 
49       i 
5i     19 
54    54 
54    20 
54    43 
48    32 

51       20 

49    29 
52      8 
55     43 
48      9 

48      9 
5i    58 
54    24 
49    27 
4^    34 
52    25 
52     23 
49       i 
50    34 
54    26 
50    36 
50    44 
48    35 
48    47 
53    56 
5i     40 
48      4 
47    42 

50      5 
53    32 
49    48 
54     21 
50    54 

7°    6'E. 
9    58 
7    5i 
8     10 

9     14 
ii       i 

9      i 
7    46 
8     25 
9    30 

8      22 

10      9 
20    30 

12         9 
12      23 

8    27 
ii     38 
21      7 
ii     34 

ii     36 

7    37 
18    40 
ii      4 
13     28 
16    56 
13      4 

12         6 

13     H 
16    23 
12    39 
15     44 
7    46 
9     ii 
14     16 
9    38 
8     27 

12         I 

8     14 
8      9 
9    55 

12      24 

14    49 

4573 
85 
133 
3296 

1319 
3261 
362 
794 
416 
669 
43 
155 
20 
1297 
39i 
329 
177 

38 
1716 

1735 

200 
15 
1033 
1015 

216 

279 

1124 

2551 
IO 

1452 

5359 
47i 
883 
33 
569 
2342 
5666 
372 
28 
588 

£ 

1394 
26 

4r 
1005 
402 

994 
no 
242 
127 
204 
13 
47 
6 

395 
119 

IOO 

54 

12 
523 

529 

61 
5 
315 

36l 
85 
343 
778 

3 
443 
1603 
144 
269 

10 

173 
7H 
1727 

JI3 

179 

7 
264 

oHambursr 

Helgoland  (North  Sea)  
Hochenschwand  (Baden) 

°Hohenheim  (Wiirttemberg)  
Hohenspeissenberg   (Bavaria)  .... 
Kahl  a   M    ^Bavaria)    

Kaiserlaut^rn  (  Bavaria)  . 

Karlsruhe  (Badeu)     

Landshut  (  Bavaria)  

Leipzi0"  (  Saxony  ;  

Ivudwio'shaf  en  (  Bavaria)  

°Magdeburg  (Prussia)    

°Memel  (Prussia)  

°Miinchen  (Bavaria)    

°Miincheii,    Bogenhausen  observ- 
atory (Bavaria)  

Miinster  (Westfalen)         
°Neufahrwasser  (Prussia)  

Niirnberg  (Bavaria)  

Passau  (  Bavaria)         

Posen  (Prussia)       

0  Potsdam  observatory  (Prussia  I  .  .  . 
Regensburg  (  Bavaria)          

Reitzenhain  (Saxony)  
Riigenwaldermunde  (Prussia)  — 
Schneeberg  (Saxony)           

°Schneekoppe  (Prussia)             .... 

°Strassburg  (Alsace) 

Stuttgart  (Wiirttemberg) 

°Swinemunde  (Prussia) 

°Uslar  (Prussia) 

Villingen  (Baden)  

Wendelstein  (Bavaria)  

Wiesbaden  (Prussia) 

Wilhelmshaven  (Oldenburg)  
"\Viirzburg  (Bavaria)                          . 

°Wustrow  (Mecklenburg)  

Zittau  (Saxony)  

13  stations  of  second  order  in  Al- 
sace -Ivorraine. 
133  stations  of  first  and  second 
order  in  Prussia. 
19  stations   of  second   order  in 
Baden. 
5   stations  of    second   order    in 
Hessen. 
12  stations  of   second   order  in 
Saxony. 
14  stations  of  second   order  in 
Wiirttemberg. 
Erfurt,    Gorbersdorf,  and   Uslar 
are   three  Prussian   first-order 
stations      whose      coordinates 
could  not  be  found. 

258 


LIST   OF    METEOROLOGICAL  STATIONS. 

The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101, 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

HOIylvAND. 
Amsterdam  .         .  .            ... 

52°    22/  N 

4°  5ix  E 

°DeBilt    .    . 

52         6 

5      II 

45 

14 

°Groningen  .  .    .  

Cl         I? 

6      14 

2Q 

°Helder  

52       58 

4      45 

3 

c 

Maastricht  

CQ      51 

5      41 

167 

cj; 

ci      54 

4      2Q 

66 

2O 

°Vlissingen 

51      26 

314 

26 

8 

ITALY. 
°Alessandria  

44       54  N. 

8     17  E 

121 

98 

°Asti  

44     54 

8     ii 

465 

142 

0  \vellino 

4Q          Cfi 

14     45 

l87I 

C7O 

°Belluno 

46       8 

12      14 

1125 

4O4 

°Benevento                ...        ... 

41        7 

14      48 

558 

1  7O 

°Bergamo..               ... 

AC       A2 

941 

1267 

186 

0  Bologna              

44      IO 

II      21 

27Q 

85 

°CasfSfiano  . 

4O      14 

15      2Q 

2728 

8li 

°Caserta              .                      

41         1 

U22 

2  SO 

76 

°Castellaneta.              

4O      l8 

16    56 

780 

2^8 

°Catania  (Bened  )          

-17      T.Q 

1C       '   A 

211 

65 

°Coiie°'liano            

4.c      c-i 

12       IQ 

27Q 

85 

°Cremona   .                          

45      8 

IO         ^ 

222 

68 

°Desenzano                

45      2S 

IO       ^2 

144 

105 

°Elena                   

41      12 

11      15 

147 

45 

°Fermo       

4^      IO 

11     41 

QIQ 

280 

0  Ferrara              

A  A      «:T 

II       77 

III 

4° 

°Firenze  

4-1  46 

II        15 

238 

73 

°Fog2ia 

41      21 

15      11 

287 

87 

°Forli      

44     11 

12          2 

163 

5° 

°Genova  

44     25 

8    55 

177 

54 

°Ischia     

4O     44 

13     54 

106 

32 

°Lecce  

4O      22 

18    12 

236 

72 

41       -i* 

10     18 

78 

24 

0  Messina 

1>8      12 

15      11 

117 

36 

°Milano            .            

45      28 

0        II 

482 

147 

°Milano                            

•17      ic 

14     44 

1522 

464 

°Modena            ,  

44     1Q 

*t     tt 
10     56 

2IO 

64 

°Moncalieri  .         

45        O 

7     41 

848 

258 

°Napoli.           

40     52 

* 

14     16 

489 

149 

0  Padova  

45     24 

ii     52 

103 

31 

0  Palermo       

l8       6 

il     20 

234 

7i 

0  Pavia  

45      II 

Q      IO 

268 

82 

0  Perugia  

41       7 

12      23 

1706 

520 

0  Piacenza  

45       1 

Q      4O 

235 

72 

°Pisa      

AT.     44 

10    24 

33 

10 

°Pistoia  

to     tt 
43    56 

10    55 

280 

85 

0  Porto  Maurizio     

41     51 

8      3 

178 

54 

°Prato  

43    53 

ii       6 

244 

74 

°Reggio    Calabria 

18      8 

15        7Q 

'48 

15 

0Riposto 

17     41 

15     12 

46 

14 

°Roca  di  Papa                        .... 

o/      •»• 

A  l      46 

12      41 

2493 

760 

°Roma  C   R                ... 

41     54 

12      29 

51 

°Roviero  . 

45       1 

ii     47 

69 

21 

°Salo       

to       o 
45     36 

10     31 

328 

IOO 

°S^ssari  .              

40    44 

8    35 

735 

224 

°Sestola  

44     T5 

10    47 

3585 

1092 

°Siena  ...    

43     T9 

II       20 

H43 

348 

259 


TABLE  101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude, 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

ITALY  (Continued). 
°Siracusa 

77°     V  N 

is°  isx  E 

76 

2"* 

°Xeramo 

42      AO 

I"}        /1  7 

QA^ 

288 

°Torino 

AZ         A 

7      41 

V4D 
QO7 

276 

°Venezia                        .    . 

4c      26 

12      2O 

yu/ 
7O 

21 

RUSSIA   (WITH   SIBERIA   AND 
FINLAND). 

Akhtuba 

48     18  N 

46      o  E 

78 

1  2 

Arkhangelsk 

64     77. 

4O       72 

o° 
22 

7 

77       S7 

S8      27 

741 

226 

Astrakhan 

46      21 

O^       ^3 
48         2 

46 

•  •  I/I 

Barnaul 

C7          2O 

87      47 

4U 

l62 

Batoum 

A  I       4O 

41       78 

oo1 

Belagatchskoe  Zimovie 

c  [          o 

?o     18 

lOA  7 

7l8 

Bo^oslovsk 

CQ         AZ 

60      I 

^^45 
627 

IQO 

Choucha  

^Q      46 

46      4S 

u^o 

4487 

1368 

°Dorpat                        

S8       27 

*"      *> 

26     47 

244 

74 

Derkoulskoe  verderie.  .          
0  Kkaterinburg               

49       3 
s6    so 

39    48 
60     78 

499 

9*  s 

152 

28s 

Elatma                     

S4     ^8 

41      4S 

4SQ 

I4o 

Elisavetgrad             .        

48    11 

-22      17 

4O^ 

127 

Golooustnoe             .          .         .... 

S2         I 

ios     ^6 

I  S22 

e* 

464 

Gudaur                               

42     28 

44      28 

7271 

22O4 

°Helsingfors                                   .... 

60     10 

24      S7 

78 

12 

°Irkutsk                                   .        ... 

S2       l6 

IO4      IQ 

jcrc 

474 

Kansk 

S6       12 

QS       ^Q 

68Q 

2Io 

Kamenaia  Steppe..  
KarsfODol 

5i       3 

6l       7Q 

40      42 
78      S7 

71  10 

44O 

218 

1-4 

Kars 

AO      17 

47         S 

S77I 

1747 

Kazalinsk  

4S     46 

62     T,7 

O/,3A 
2O7 

S 

Kern  

64      S7 

MIQ 

41 

17 

Kharkof  

SO          O 

/-'        " 
-26      "^4 

4SQ 

I4O 

Kief  

SO       27 

•^o      o 

600 

187 

Kirensk    

S7      47 

108      7 

886 

27O 

Kola  

68     S3 

77        II 

22 

7 

Kursk..              

Si     ,4s 

76      S2 

777 

27C 

Lenkoran          

18    46 

48           I 

116 
64 

IQ 

Libau  ... 

J"       q.«j 
c6       71 

21          I 

16 

s 

Lubny        .  .        .          ... 

CQ         I 

77       22 

S4I 

165 

Lugansk 

48    1$ 

•7Q          JO 

148 

4S 

Magaratch 

44      "*2 

^4        ^ 

262 

80 

Malye  Karmakouly 

72      27 

S2      47 

48 

15 

Mariupolskoe  verderie 

47      ^Q 

77      7O 

QIQ 

280 

Mezen  . 

4/      jy 

6s     so 

44      1  6 

yiy 
46 

14 

Moscou                   .  .    . 

CC         AZ 

77      74 

SI2 

156 

Nertchinski  Zavod 

SI       JQ 

I  IQ      "*7 

2oS4 

626 

Nijni  Novgorod 

0^         V 

s6    20 

44        O 

Si8 

158 

Nikolaief 

46     s8 

•;i     s8 

64 

20 

Nikolsk 

SO      "^2 

4S      27 

So8 

156 

Novaia  Alexandria 

S  I       2S 

2  1       S7 

482 

147 

Novorossiisk 

44      44 

77       AQ 

121 

77 

Obdorsk 

66     -I 

66      7S 

86 

26 

Odessa          .... 

46     26 

7O       46 

140 

A\ 

Omsk 

S4      SS 

77       27 

2QS 

CO 

Orel               .... 

S2      s8 

76        4 

6co 

187 

Orenburg     

ci      AS 

ss      6 

771 

I  17 

Pamirski  Post  

78    1  1 

74         2 

IIQ42  '  ) 

764O(')) 

260 


LIST   OF    METEOROLOGICAL  STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101 


RUSSIA,  ETC.  (Continued). 

Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

°Pavlovsk 

SQ°   4l'  N. 

1O°    2Q7  E 

T7O 

Pensa                          .      .      .  ' 

Cl         II 

4S         I 

6s 
7o6 

21  C 

Perm                           

58      i 

s6     16 

S22 

•fio 

1  ^Q 

Pernov  

S8      2^ 

24.      ^O 

12 

1  O 

Pinsk        

S2         7 

26      6 

466 

142 

Ploti  

47      S7 

2Q       IO 

468 

141 

Polibino 

C-2        A  A 

S2       ^6 

l^S 

108 

Povenets 

62       SI 

MAQ 

141 

AT. 

Rostov  on  Don 

4.7      1  1 

1Q      41 

I  SQ 

45 

A8 

Rykovskoe 

Cn       A7 

142      SS 

4IO 

I2S 

Sacmnv 

co     1.6 

1Q      41 

68s 

2OQ 

Samarkand  .... 

1Q         -5Q 

66      S7 

21CQ 

7IQ 

Sarapul  

S6     ;8 

SI      4Q 

*O«>7 

l8Q 

IIQ 

Saratof  

SI       12 

^^      4V 
46         1 

2OI 

iiy 
6l 

Smolensk.  .  .  .  j  .  .         

S4     47 

12         4 

748 

228 

Stavropol  

AC            1 

41      SQ 

1880 

S71 

°St.  Petersburg  (Cent.  Phys.  Obs.). 
Surgut  

59     56 
61     17 

30     16 

71     2O 

16 
144 

5 
44 

Tashkent 

41       20 

69     18 

is68 

478 

Tchita 

C2        i 

III       IO 

227S 

6Q1 

°Tiflis 

41      41 

44     48 

I12S 

AOA 

Tiumen 

S7      IO 

6s     12 

27O 

82 

Tomsk 

cfi     10 

84     s8 

4IO 

I2S 

Totaikoi 

44      S4 

Mil 

QQ4 

1O1 

Troitskosa  vsk  . 

CQ      22 

106     27 

2C-2Q 

774 

Tulun                               .    .    . 

Mil 

IOO      22 

-'OOV 
1648 

SO2 

Ufa  

S4      41 

ss     s6 

S7I 

174 

Uman      

48      4S 

IO       11 

7OQ 

216 

Uralsk     

ci       12 

SI       22 

124 

l8 

Uspenskaia    .    . 

56      l8 

1Q      12 

78l 

21Q 

Valaam  

2      & 

DI       21 

IO      C7 

122 

17 

Varshava  (  Warsaw  )  

C2       11 

21         2 

1Q6 

121 

Vasilevitchi  

52     16 

2Q      48 

44Q 

117 

Veliki  Luki  

56       21 

^o     -zi 

14  1 

104 

Verkhniaia  Michikha  

SI       IO 

ios    s8 

4IQQ 

1280 

Verhkoyansk  

f 

67       11 

111     24 

4SQ 

140 

Verni 

41     16 

76     si 

2<c68 

781 

Vilna 

M4I 

25     18 

486 

148 

Viatka 

s8    16 

4Q      41 

S2Q 

161 

Vladivostok. 

41        7 

III      S4 

CC 

17 

Vlotslavsk                                 .    . 

S2      4O 

IQ        4 

211 

6s 

Vologda                                   .    ... 

SQ      14 

1Q      SI 

1QQ 

122 

Vychni  Volotchek  

S7      IS 

14      14 

S48 

167 

Zlatoust        

SS      IO 

SQ      41 

ISO2 

4S8 

1,227  stations  of  second  order  in 
Russia,  Siberia,  and  Finland. 

SPAIN  AND  PORTUGAL. 
Barcelona  (Spain) 

41      22  N. 

2      10  E. 

141 

4? 

Cadiz  (Spain). 

l6      11 

6     18  W 

(?) 

(?) 

°Coimbra  (Portugal).  . 

40      12 

8     ?s 

4SQ 

140 

°Ivisboa  (Portugal)  

lS     41 

Q            Q 

112 

QS 

Madrid  (Spain)  

40     24 

1     41 

2I4Q 

655 

Ona  (Spain  )  

42     44 

1     2S 

f 

IQO6 

58r 

Oporto  (Portugal)  

41       8 

8     34 

328 

IOO 

Oviedo  (Spain) 

41      21 

S     48 

801 

244 

°San  Fernando  (Spain)  
°Sierra  da  Estrella  (Portugal)  
Valencia  (Spain)  

36      28 
40      25 
1Q       28' 

o     25 

7     35 

O       22 

92 

4728 
SQ 

28 
1441 

18 

261 


TABLE  101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order/ 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

SWITZERLAND. 

Altstatten 

47°    2V  N 

cn°  -i'  E. 

1476 

450 

Altdorf 

46      51* 

8       ^Q 

I4Q^ 

455 

Basel  

47     ^3 

7     ^5 

912 

278 

°Bern 

46      57 

7      26 

1877 

572 

Castasegna. 

46      2O 

9-j  I 

22Q7 

7OO 

Chaumont.  . 

47        I 

,      6 
6      5Q 

•370! 

1128 

Genf. 

46      12 

6       Q 

I  ^2Q 

4O5 

Lugano 

46        O 

8     57 

QO2 

275 

Neuenburg  

47       o 

x-          5/ 

6     57 

l6oi 

488 

Pilatus-Kulm  

•f 

46     59 

8     16 

6;8l 

2067 

Rigi-Kulm  

47       3 

8    30 

5S63 

1787 

°Santis. 

47      15 

Q      2O 

S2O2 

25OO 

Sils-lVTaria 

46      26 

946 

59^5 

1800 

St  Bernhard 

4C      C2 

7      II 

8  1  V) 

2478 

°Zurich  

47     23 

8    33 

1687 

493 

BALKAN   PENINSULA  AND 
ASIATIC  TURKEY. 

(BULGARIA,  GREECE,  ROUMANIA, 
SERVIA,  AND  TURKEY.) 

0  Athens  (Greece). 

37     58  N. 

2*     4.=:  E 

Baghdad  (Asiatic  Turkey) 

•J-I         IQ 

44     26 

°Belgrad  (Servia)      

44     48 

2O     27 

4c-j 

138 

Beyrout  (Syria)  
Bouiouk-Dere  (Asiatic  Turkey)  . 
°Bucuresci  (Roumania)  .    

33     54 
41     10 
44     25 

35     28 
29      3 
26       6 

172 

384 
269 

52 

117 
^2 

Constantinople    (European   Tur- 
key)    

41       2 

28    58 

246 

75 

El-Athroun  (Palestina)  

31     SO 

35       o 

656 

200 

Kazan!  ik  (Rumelia) 

42      "*7 

27         A 

1  2  2O 

372 

Le  Krey  (Syria)  

33       4Q 

35     4° 

\rjo 

1015 

Mamouret-ul-Aziz    (Asiatic   Tur- 
key)   

^8     ;o 

-;Q     22 

3281  (?; 

icoo(?) 

Monastir  (  European  Turkey)  .  . 
Saloniki  (European  Turkey)  .... 
Sinaia  (Roumania)             .    ... 

41       I 
40    39 
45     21 

21     23 
22     57 
25     34 

2024 
129 
2821 

617 
'9 
860 

Sinope  (Asiatic  Turkey)     

42        I 

75      iq 

59  (?) 

i8(?) 

Sivas  (Asiatic  Turkey)           .    ... 

•5Q       47 

^7     10 

4331 

1320 

Sofia  (  Servia)  ...    .          

42    42 

23     19 

1804 

550 

Smyrna  (Asiatic  Turkey)  
Sulina  (Roumania)  .  , 

38    26 

45        9 

27       8 

2Q      4O 

7 

2 

(Greece  has  23  stations  of  second 
order,  Roumania  52,  and  Servia 

18.) 

ADDITIONAL  STATIONS   TO 
ASIATIC  TURKEY. 

(Austrian  colonial  stations.) 

0  Jerusalem  (Palestina)  
°Sarona  (Palestina)  
°Skutari  (Asia  Minor)  

31     48  N. 
32       5 

42        3 

35     ii  E- 
34     47 
19    30 

-'554 
66 

3° 

748 
2O 

9 

262 


TABLE  101 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


ASIA. 

INDIA  (WITH  NEIGHBORING 
COUNTRIES). 

(The  stations  are  in  India  unless  other- 
wise indicated,) 

Aden  (Arabia)    

Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

12°  45'  N. 
27     10 
26     28 

20      42 
20      28 
25      26 

ii      6 
12     59 

7    43 
15    52 
T5      9 
24      6 

18    54 
23     M 
28    59 
22    32 

22      21 

9    58 
6    56 

2O      29 

23    43 
27      3 
24     16 
26      7 

15    52 
26     10 

20      20 
6         I 

6      7 

24       o 
22     45 

28   24 

9    40 
26     55 
23       9 
7     18 
14    50 
27    42 
21     49 
10    14 

24    47 
3i     34 
34     10 
26    50 

3°    55 
13      4 
29       o 

12       26 
12       II 

30     10 

24      36 

33     54 
21       9 

45°     3'E. 
78      5 
74    37 
77      4 
92    57 
81     52 
72    48 
77    38 
81     44 
74    42 
76    57 
88     17 
72     49 
87     54 
5°    49 
88     20 

91     50 
76     17 

79    52 
85     54 
90    27 
88     18 
72     14 
89    50 
94     19 

86    47 
80     14 
81      7 
85     24 
77    46 
68     18 
79    56 
75    50 
79    59 
80    40 

74     15 
85     12 
76    23 

77     28 
67      4 
74    20 
77    42 
8r       o 

75     54 
80     14 

77    4i 
75    48 
98    38 

7i     33 
72     45 
73     27 
79     ii 

94 
555 
1611 

93° 

20 
309 
15 
3021 
26 
2539 
1475 
67 

37 
99 
14 

21 

87 
10 
/O 

80 
26 

7$ 

115 

41 
166 

21 
48 
40 
2OO7 
IOO6 

1  86 
9 
1431 
1327 
1696 

44 
4388 
1044 
7688 
30 
702 

11503 
368 
812 

22 
738 
3781 
96 
420 

3945 
6333 
1025 

29 
169 
491 
283 
6 
94 
5 

„« 

774 
450 

20 

II 

30 

4 
6 
26 
3 

12 
24 

8 
2248 
142 
35 

12 
51 

6 
15 

12 

612 

307 

57 

436 
404 

517 
13     . 
1337 
3'7 
2343 
9 
214 
35o6 

112 

247 

7 
225 
1152 

29 
128 

1202 
1930 
312 

Agfra 

Ajmir        

Akola                                         

Akyab  (  Burma) 

°Allahabad                            

Amini  Divi  (Lakkadives)  
°Bangalore  
Batticaloa  (Ceylon)  

Bellary                       

°Bombay.               

Bushire  (Persia).                        .  . 

°Calcutta  

Chittagong                          

Cochin                                

Colombo  (Ceylon)  

Cuttack              

Dhurbi           

Diamond  Island  (  Burma) 

False  Point  

Gille  (Ceylon) 

Hambantota  (  Ceylon) 

Hoshangabad     

Jacobabad    

Jaffna   (Ceylon) 

°Jaipur            

Kandy  (Ceylon)  

Karwar  

Khandwa 

°Kodaikanal  observatory  

Kurrachee                                           . 

0  Lahore 

Leh  (Kashmir)      

Lucknow         .  .    . 

Ludhiana       ... 

°Madras   

Meerut   ....                      , 

Mercara          

Mergui  (Burma)  

Mount  Abu  

Murree 

Nacrour 

263 


TABLE  101. 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet). 

Height  (m.) 

INDIA,  ETC.  (Continued). 

Newera  Eliya  (Ceylon)  
Nowgong.       .          

6°  46'  N. 

2S         2 

80°  47'  E. 

7Q      2Q 

6240 

7S7 

1902 

211 

Patna.            

2S       17 

jy     *y 

8s     14 

181 

Z31 

rfi 

°Periyakulam  observatory... 

1O         Q 

77      72 

Q44. 

288 

Peshawar         

•1A             2 

71       17 

1  1  IO 

Il8 

Poona  ....    ...            
Port  Blair  (  Bay  Islands)  
Quetta  (Beluchistan)  

l8      28 
II       41 
IO       II 

74     10 
92     42 
67         1 

1840 

61 

SSC2 

561 
19 

l677 

Raipur          

21       IS 

81     41 

070 

2Q6 

Rangoon  (Burma).          

16    46 

06      12 

S7 

T7 

Ranikhet                       

2Q       l8 

7Q      2Q 

6069 

i8so 

Ratnagiri 

y     •**; 

17       6 

71      21 

1  IO 

14 

Rookee                 

2Q       S2 

77      rA 

SQQ 

274 

Salern 

II      1Q 

78      12 

Q4O 

286 

Saugor  Island. 

21        1Q 

88       s 

2S 

8 

Secunderabad  . 

17      27 

""          O 

78     11 

1787 

S4S 

Sholapur 

17      41 

7S      S6 

ISQO 

48s 

Sibsagar 

26      SQ 

Q4      4O 

111 

I  OI 

Silchar                                .    . 

24      4Q 

Q2      SO 

IO4 

12 

°Simla 

11         6 

77      12 

7224 

22O2 

Sutna 

24      14 

80      S2 

1040 

117 

Trichinopoly  

10     so 

78     44 

2SS 

77 

Trincomalee  (Ceylon)  

8    31 

81     IS 

12 

4 

Vizagapatam 

17      42 

83      22 

226 

6q 

Wellington  

II      22 

76     So 

62OO 

"7 
l8qo 

CENTRAL  ASIA,  CHINA,  AND 
INDOCHINA. 

Cap-Saint-Jaques    (Cochinchina) 
Djalantown  (China)  
Enzeli  (Persia) 

IO      2O  N. 
48         I 

•77         -5Q 

107      5  E. 
123      6 

4Q      27 

490 
1060 
(?} 

150 
323 
f?l 

Hanoi  (Tonkin) 

21          2 

joC       SO 

S2 

16 

°Hongkong  (China)  
Kashgar  (Turkestan)   

22       18 
1Q      2S 

114     10 
76      7 

no 
1QQQ 

34 
1219 

Kerki  (  Bokhara)  

17     So 

6c     j'i 

8SQ 

262 

Khantagheza  (China)  

45     (?) 

120      P) 

1417 

412 

Kharbin  (China)              

45     41 

126      28 

SO2 

I  si 

L/ang-Bian  (Anam)  ...         ... 

1  2         2 

108    20 

46O6 

1^04 

Nha-Trang  (Anam)  

12     16 

109       12 

2Q 

9 

Pekin  (China)  

1Q      S7 

116     28 

121 

17 

Pnom-Penh  (Camboja) 

IO      IS 

104     s6 

41 

1  1 

Pulo-Condor  (Cochinchina)   ... 
Saigon  (Cochinchina)  
Terrnez  (Bokhara)  .... 

8     16 
10    47 
17      12 

1  06    35 
106     42 
67    is 

21 
29 
1066 

6 

9 
325 

Urga  (China)  
°Zi-Ka-Wei,  for  Shanghai  (China) 

JAPAN  AND  KOREA. 

Chemulpo  ^  Korea)  

47     55 

31       12 
VJ      29  N. 

106     50 

121       II 

126     17  E- 

4447  (?) 
23 

2Q 

1325  (?) 
7 

9 

°Fukuoka  

11      ^5 

HO      21 

12 

4 

Fusan  (  Korea)    

35       6 

I2Q      IO 

°Hakodate 

H     46 

1  4O     44 

IO 

T. 

°  Hiroshima 

14      21 

112      27 

IO 

•J 

°Kobe 

M4I 

IIS      II 

IQI 

c8 

°Kumamoto 

12      4Q 

HO      42 

I2Q 

•2Q 

°Matsuyama.  . 

11      SO 

112      4S 

1  06 

^2 

264 


LIST   OF    METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  101 


Latitude. 

Longitude 
from 
Greenwich. 

Height 

(feet) 

Height  (m.) 

JAPAN  AND  KOREA  (Cont'd). 
°Nagasaki        ....              

32°  44'  N 

I2Q°    52X  E 

4^6 

j  \  -• 

°Naha                         

26     IT. 

127     41 

7.4 

IO 

°Nasrova   . 

7,5         JO 

j  7.6       55 

50 

j  5 

°Nemuro  

A\     20 

145      7.5 

87 

27 

°Osaka  

M42 

17.5        71 

18 

6 

°Sapporo 

AT.          A 

1  41      2  1 

cc 

17 

Seoul  (  Korea)  .    .  . 

7.7      7.5 

127        7 

118 

76 

°Tadotsu  

74      17 

177,      46 

17 

5 

°Taihoku  

25         2 

121       30 

7O 

Q 

°Tokio  

35      41 

1  TO      45 

7° 

21 

°Tokushima  

M6 

17.4       7,7 

13 

4 

°Tsukuba 

7.6     i~\ 

1  4O         6 

2854 

870 

Yuen-san  (Korea). 

7Q         JO 

127      25 

0  Denotes    the    stations    taking 
hourly  observations. 
85  stations  in  Japan  taking  6  ob- 
servations daily. 

PHILIPPINES  AND  HAWAIIAN 
ISLANDS. 

°Aparri  (Luzon)  

18     22  N. 

121     34  E. 

20 

6 

°Atimonan  (Luzon)  

14         2 

121      51 

21 

7 

°Cebu  (Cebu)      

10     18 

121       54 

IO 

7 

°Dagupan  (Luzon). 

16      4 

1  20     i  Q 

17 

°Honolulu  (Hawaii) 

21       J  Q 

157      52  W 

38 

II 

°Iloilo  (Panay) 

10     42 

122      7.5  E. 

IO 

7 

°Le£faspi  (Luzon) 

J  -1              Q 

J27      44. 

1778 

42O 

°Manila  (Luzon) 

H'lC 

1  2O      5Q 

*<5/" 

46 

14 

°Ormoc  (Leyte)       .          

II         O 

124      77 

1476 

45O 

AUSTRALASIA. 

Adelaide  (South  Australia)  
Albany  (West  Australia)  
Alice  Springs  (South  Australia)  .  . 
Auckland  (New  Zealand)  
°Batavia  (Java)                     ... 

34    56S. 
35       2 
23     38 
36    50 
6     ii 

138    35  E. 
117    50 
133    37 
174    5i 
1  06    50 

41 
1926 
258 
26 

12 

587 

79 

°Boulia  (Queensland)  
Bourke  (New  South  Wales)  
°Brisbane  (Queensland)  
°Burketown  (Queensland) 

22     55 
30      3 

27     28 

17      45 

139    38 
145    58 

153         2 

I  7Q        77 

350 

137 

107 
42 

°Camooweal  (Queensland)  
°Cooktown  (Queensland)  
Derby  (West  Australia) 

19    57 
15     28 

17      l8 

I38         17 
145         17 

122      4O 

C7 

16 

Eucla  (South  Australia).. 

71        45 

128      58 

1C 

5 

0  Georgetown  (Queensland). 

l8      22 

147         72 

°Gornen  (New  Caledonia). 

2O      21 

164     10 

Hobart  (Tasmania)           

42       51 

147      2O 

160 

4Q 

°Mackay  (Queensland)  
Malacca  (Straits  Settlements)  ... 
Melbourne  (Victoria)       

21      9 
2     14  N. 
M     SO  S. 

149     13 

102       14 

145       o 

12 

91 

4 
28 

0  Mitchell  (Queensland)  

26       12 

147     52 

°Norfolk  Island  (South  Pacific).  .  . 
Noumea  (New  Caledonia)  

29      5 

22       IO 

167     58 
166     26 

.... 

.... 

Penaug  (Straits  Settlements)  
Perth    observatory    (West  Aus- 
tralia)                              .  . 

5     24  N. 
7,1      57  S. 

IOO       20 
115       51 

20 
IQ7 

6 
60 

265 


TABLE  101. 


LIST   OF   METEOROLOGICAL   STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


Latitude. 

Longitude 
fr  m 
Greenwich. 

Height 

(feet). 

Height  (m.) 

AUSTRALIA  (Continued). 

Port  Darwin  (South  Australia)  .  .  . 
°Port  Moresby  (New  Guinea)  .... 
Province  Wellesley  (Straits  Set- 
tlements )  
°Richmond  Downs  (Queensland).  . 
°Rockhampton  (Queensland)  .  .  . 
°Samarai  (  Queensland)  
°Sandy  Cape  (Queensland)  
Singapore  (Straits  Settlements). 
°Suva(Fiji)    

12°    28/S. 

9     27 

5     21  N. 
20    44  S. 
23     24 
jo     38 

24     41 
i     17  N. 
18      6S 

130°  51'  E. 
147       9 

TOO      28 

r43     10 
150    30 
150    38 
'53     16 

'03       51 

178     10 

97 
65 

10 

29 
20 

3 

°Sydney  (  New  South  Wales)   
°Thargomindah  (Queensland)  
°Thursday  Island  (Queensland)  .  .  . 
°Townsville  Pilot  Station  (Queens- 
land)   

33     52 
27     58 
10    34 

iq     14 

151       12 

143     43 

142       12 
146      51 

146 

44 

Wellington  (New  Zealand)  
°Windorah  (Queensland)  

41     16 

2S       26 

174      27 
142      36 

140 

43 

AFRICA  AND  NEIGHBOR- 
ING ISLANDS. 

°Abassia  Observatory  (Cairo)  

30       5  N 

11      17  E 

io3 

11 

Adis-Abada  (Abyssinia)   

Q        I 

l8     41 

(?) 

(?) 

Alexandria  (Egypt)  

1  '       12 

2Q       SI 

105 

12 

Alger  (Algeria).  .          

,Ji 

15      47 

1          A 

I2S 

38 

Benghazi  (Tripoli)  ' 
Bizerte  (Tunis)  
Cape  Spartel  (Morocco).. 

32      7 
37     17 

-2C      47 

20          2 

9     50 
S     SS  W. 

31 
29 
IQI 

9 

s8 

Cape  Town  (Cape  Colony) 

OO        "tl 
-l-l         CC   S 

1  8     24  E. 

lie 

IS 

Ceres  (Cape  Colony). 

IT.       22 

IQ       2O 

I4Q1 

4SS 

Constantine  (Algeria). 

36      22  N 

6     M 

2i6s 

660 

El-Djem  (Algeria)  
Entebbe  (Uganda) 

35     21 

0           1  S 

10    38 

12       1O 

541 

1QO2 

165 
1189 

Fort  Napier  (Natal)  

29       36 

1O      2^ 

220O 

671 

Fort  National  (Algeria)  
Grahamstown  (Cape  Colony)  
Geryville  (Algeria)      
Ismailia  (Egypt)      
°Kenilworth  (Kimberley)  
Khartoum  (Egypt)  

36     38  N. 
33     i8S. 
33     4i  N. 
30     16 
28    42  S. 
1=5     iSN. 

4     12 

26      32 
I         0 

32     16 
24     27 

12       29 

3005 
I800 
428l 
30 
3950 
1233 

916 

549 
1305 
9 
1204 
376 

Kimberley  (Cape  Colony)  
Laghuat  (Algeria)    
Mayumba  (  French  Congo)  
Mojunga  (Madagascar)  

28    43  S. 
33     48  N. 
3     25  S. 
15     45 

24      46 

2     53 
10     38 
46     19 

4042 
2467 

213 
134 

1232 
752 
65 

41 

Mozambique  (East  Africa) 

15       o 

4°    44 

14 

4 

Oran  (Algeria)  .... 

I1;     42  N. 

o    39  W. 

107 

60 

Ouargla  (Algeria)      

H         S<C 

5     10  E. 

512 

156 

Ponta  Delgada  (Azores) 
Port  Elizabeth  (Cape  Colony)  .  .  . 
Porto  Novo  (  Dahomey)  
Port  Said  (Egypt)         
Queenstown  (Cape  Colony)    .... 
Royal  Alfred  observatory  (Mau- 
ritius)           

37     45 
33     58  vS. 
6     28  N. 
31     16 
3r     54  S. 

20      6 

25    4i  W. 
25    37  H. 

2      40 

32     18 
26    52 

57     31 

56 

181 
66 

14 
35oo 

181 

17 
55 

20 

4 
1067 

55 

°Royal  observatory  (Cape  Colony) 
Sierra  Leone  (Senegambia)    .... 
St   Denis  (Reunion) 

33     56 
8     30  N. 
20    51  S 

18     29 
13       9W. 

tCS       1O  E- 

40 
179 

IO2 

12 

54 
31 

266 


LIST   OF    METEOROLOGICAL  STATIONS. 

(The  circle  °  designates  stations  of  the  first  order.) 


TABLE  1O1 


Latitude. 

Lo'-ai  ude 
from 
Greenwich. 

Height 

(ieet). 

Height  (m.) 

AFRICA,  ETC.  (Continued). 

St.  Louis  (Senegal)  
St.  Matthew's  Vicarage  (St.  Hel- 
ena)   

16°     2'  N. 
16       o  S. 

1  6°  31'  W. 

5     4° 

13 

1887 

4 
573 

°St.  Paul  de  Loanda  (  Angolo)  

8    47 

13     IT,  E 

194 

59 

Suez  (Esrvot).. 

20     19  N. 

72         "IT 

II 

3 

Tamatave  (Madagascar). 

18     10  S 

49      21 

16 

5 

Tananarivo  (Madagascar)  

18     10 

47     36 

4593 

1400 

Tangier  (Morocco) 

IS     47  N. 

1       AQ  W 

246 

75 

Teneriffe  (Canary  Islands)  . 

28     25 

1  6     1.0 

454 

I#J 

Timbuktu  (French  Sudan)  
Upper  Sheikh  (East  Africa)  
Vivi  (Congo)  .... 
Zanzibar  (British  East  Africa)  .  .  . 

INTERNATIONAL  POLAR 
STATIONS. 

Bossekop  (Norwegian)  

16    43 
9    56 
5     40  S 
6     10 

69     57  N. 

2      52 

45     1  1  E. 
J3    49 
39     ii 

23       11  E 

820 
4595 
364 
73 

250 
1400 
in 

22 

Dicksonhavn  (  Holland)  
Fort  Rae  (British)  

73     30 

62      39 

81       o 
III     44  W. 

Godthaab  (Danish)  

,         J? 

64     10 

SI      4^ 

Jan  Mayen  (Austrian) 

7O      1Q 

8     28 

Kingua-  Fjord,  Cumberland  Sound 
(German)  

66    36 

67       q 

Lady  Franklin  Bay  (United  States 
Nowaja  Semlja  (Russian).  .  .  . 
OranjeBaie,  Cape  Horn  (French) 
Point  Barrow  (United  States)  
Sagastyr,  Lena  River  (Russian  )  . 
Sodankyla  (Finland) 

81     44 
72     30 
55     3i  S. 
71     23  N. 

73     23 

6?      27 

'        * 
64     45 
52    '45  E. 
70     25  W. 
156    40 
124      5  E. 
26     36 

.... 

.... 

Spitzbergen  (Sweden)  CapThord- 
sen  . 

78      28 

IS      42 

Siid-Georgien  (German)  
MEDITERRANEAN. 

College  St.  Ignace  (  Malta)  
Gibraltar  

54    31  S. 

35     55  N. 
30      6 

36      oW. 

16    49  E. 
5     21  W. 

(?) 
48 

(?) 
15 

Kyrenia  (Cyprus)..              ... 

3S       21 

33      19  E. 

54 

16 

La  Canee  (  Creta)   
Mahon  (Minorca)  

35    3° 
ID     fi 

24       o 
4     IS 

141 
43 

43 
I3 

267 


TABLE  102. 

INTERNATIONAL  METEOROLOGICAL  SYMBOLS. 


The  International  Meteorological  Congress,  held  at  Vienna  in  September, 
1873,  decided  that  it  was  desirable  to  introduce  for  various  meteorological 
conditions,  symbols  which  should  be  independent  of  any  national  language 
and  therefore  universally  intelligible.  From  the  symbols  and  abbreviations 
then  in  use  among  different  nations,  the  Permanent  Committee  of  the  Con- 
gress selected  a  number  for  international  use.  This  list  has  been  subse- 
quently modified.  The  present  arrangement  has  been  carefully  revised  by 
Messrs.  S.  P.  Fergusson  and  H.  H.  Clayton. 

References  : 

"Summary  of  Resolutions  of  the  Vienna  Congress,  Appendix  K."     Prepared  by 

Mr.  Robert  H.  Scott,  Secretary. 

"  Bericht  iiber  die  Int.  Meteor.  Conferenz  in  Miinchen,  1891." 
"Report  Proc.  Int.  Meteor.  Conferences,  Paris,  1896."     By  Dr.  A.  Lawrence  Rotch. 

SYMBOLS. 

%  Rain.                              V     Frostwork  (Rough  Frost).  T  Distant  Thunder. 

-*-  Snow.                           GN3     Ice  Coating :  Silver  Thaw.  CO  Haze. 

^  Hail.                             4*.     Drifting  Snow.  0  Solar  Halo. 

/^  Sleet.                            +—     Floating  Ice-Crystals.  ®  Solar  Corona. 

^=  Fog.                              _JJJJ    Gale  or  Strong  Wind  ^37  Lunar  Halo. 

_Ci_  Dew.                            IH.     Thunderstorm.  U^  Lunar  Corona 

i — i  Hoar  Frost.                  <£     Distant  Lightning.  /~\  Rainbow. 

[X]  Surrounding  country  more  than  half  under  snow.  s^±^/  Aurora. 

^  Zodiacal  Light. 

The  intensity  of  a  phenomenon  is  denoted  by  an  exponent  o  indicating 
slight;  2,  great,  and  an  absence  of  exponent,  moderate  intensity. 

The  time  of  occurrence  is  expressed  in  hours  and  tenths;  morning  and 
afternoon  are  indicated  by  A  and  p,  respectively;  midnight  and  noon  by 
12  P  and  12  M,  respectively;  the  hours  being  counted  from  o  to  12,  com- 
mencing with  midnight.  The  continuance  of  a  phenomenon  is  indicated 
by  a  dash  ( — ). 

The  following  paragraphs  give  a  few  details  as  to  the  use  of  the  above 
symbols : 

268 


TABLE    1O2. 

INTERNATIONAL  METEOROLOGICAL  SYMBOLS. 

%  RAIN. 

To  be  used  in  place  of  the  word  commonly  used  in  any  language  for 
rain-fall  or  raining.  The  intensity  to  be  indicated  by  an  exponent. 

-)(-  SNOW. 

Indicates  snow-fall  or  snowing.  Depth,  rate,  or  intensity  to  be  denoted 
by  the  usual  exponent. 

^  HAIL. 

Semi-transparent  masses  of  ice,  large  or  small,  crystalline  or  rounded, 
usually  occurring  during  thunderstorms.  The  small  frozen  rain- 
drops which  occur  in  winter  should  be  classified  as  SLEET  A.. 

£±  SLEET. 

Pellets  of  snow  or  soft  hail  without  crystalline  structure.  This  symbol 
is  used  by  the  Germans  for  Graupeln  or  snow  pellets,  and  for  the 
semi-transparent  mixture  of  snow  and  ice  that  in  the  dry  weather 
of  Central  Europe  nearly  corresponds  to  the  sleet  of  the  coasts  of 
England  and  America.  Also  frozen  raindrops,  occurring  when 
rain  is  changing  to  snow. 

V  FROSTWORK  (Rough  frost ).  (German,  Rauhfrost,  Duft.  French,  Givre.) 
When  fog  prevails  and  the  temperature  is  below  the  freezing  point, 
exposed  objects  become  coated  on  the  windward  side  with  frozen 
fog  particles.  This  is  not  accumulated  snow  or  ice.  This  has 
been  observed  on  Mt.  Washington  to  be  sometimes  a  metre  or  more 
in  depth.  Sometimes  called  Frost  Feathers. 

G\3  ICE  COATING  (Smooth  Ice  ;  Ice  Storm):  Silver  Thaw.     (German,  Glatt 

Eis.     French,   Verglas.} 

Indicates  the  coating  of  ice  formed  by  rain  freezing  on  exposed  objects 
when  the  air  temperature  is  below  freezing  ;  also  the  deposition  of 
frozen  moisture  when  the  weather  becomes  suddenly  warm  after 
great  cold. 

<—  FLOATING  ICE  CRYSTALS. 

Small  ice  crystals  or  spiculae  slightly  resembling  snow.  Occurs  some- 
times during  fine  weather  when  the  temperature  is  low. 

H  SNOW  COVERING. 

Indicates  that  more  than  half  of  the  surrounding  country  is  covered 
with  snow. 

*— J  HOAR  FROST  ;  "— «°  LIGHT  HOAR  FROST  ;  i— '*  HEAVY  HOAR  FROST,  in- 
jurious to  vegetation.  The  expression  "frosty  weather"  refers  to 
the  low  temperature  as  such,  but  the  expression  "hoar  frost" 
refers  to  the  crystals  of  ice  deposited  upon  the  surfaces  of  solids  in 
the  open  air.  Hoar  frost  is  deposited  on  horizontal  objects  gener- 
ally under  a  clear  sky  at  night. 

269 


TABLE  102. 

INTERNATIONAL  METEOROLOGICAL  SYMBOLS. 

-•^  STRONG  WIND  OR  GALE. 

I^k  THUNDERSTORM. 

Thunder  and  lightning. 

^  DISTANT  LIGHTNING. 

T    DISTANT  THUNDER. 

0  SOLAR  HALO. 

Solar  halos  are  large  circles  around  the  sun,  reddish  inside  or  near  the 
sun  and  bluish  outside  or  away  from  the  sun.  The  edges  or  bound- 
aries are  more  distinctly  marked  than  those  of  coronas  and  the  sizes 
are  more  definite  and  regular.  Halos  are  most  frequently  of  22° 
radius,  less  frequently  45°  or  46°,  and  rarely  90°.  Complex  com- 
binations of  halos,  parhelia,  horizontal  circles,  and  vertical  columns 
sometimes  occur.  Exponents  are  used  to  indicate  relative  brilliancy . 

0  SOLAR  CORONA. 

Solar  Aureolas,  Coronas,  or  Glorias — German,  Kra?iz,  Lichtkron,  Corona, 
SonnenhoJ — are  small  circles  of  prismatic  colors  surrounding  the 
sun  ;  the  radii  of  these  circles  are  usually  less  than  6°,  but  in  the 
extreme  case  of  Bishop's  ring  its  radius  was  15°.  Several  con- 
centric circles  are  sometimes  visible  ;  each  circular  band  of  prismatic 
colors  has  its  red  on  the  outside,  and  its  blue,  violet,  or  purple  on 
the  inside,  with  respect  to  the  sun  ;  such  rings  are  generally  formed 
when  the  sun  shines  through  a  thin  cloud  and  may  be  seen  if  the 
sun  is  viewed  through  neutral- tinted  glass  or  by  reflection  in  water. 
Similar  circles  surrounding  the  shadow  of  the  observer's  head  are 
called  "anthelia,"  "aureolse,"  "glories,"  or  "fog-shadows" 
(German,  Gegensonnc,  Brockenspectra], 

*37  LUNAR  HALO. 

Lunar  halos  are  the  large  circles  22°  or  46°  radius  around  the  moon, 
entirely  analogous  to  solar  halos,  being  red  on  the  inside  of  the  arc 
and  blue  on  the  outside. 

uy  LUNAR  CORONA. 

Lunar  Aureolas— German,  Mondhof—zro.  small  circles  surrounding  the 
moon  similar  to  the  solar  coronas,  being  red  on  the  outside  and 
blue  inside. 

/^  RAINBOW. 

Brilliant  rainbows  should  be  indicated  by  the  sign  /^-;  the  primary 
rainbow  has  its  red  on  the  outside  and  a  radius  of  40°  to  42°,  but 
the  secondary  bow  has  its  red  on  the  inside  and  a  radius  of  50°  to 
54°. 

^  ZODIACAL  LIGHT. 

A  triangular  beam  of  light  seen  after  evening  twilight  or  before  morning 
dawn,  extending  from  the  sun  upward  along  the  ecliptic. 

270 


TABLE    102. 

INTERNATIONAL  METEOROLOGICAL  SYMBOLS. 
INTERNATIONAL  CLOUD  NOTATION. 

Authorized  by  the  International  Meteorological  Committee,  Upsala,  1894. 

Ci.  Cirrus.  N.  Nimbus. 

Ci.  S.  Cirro-stratus.  Cu.  N.  Cumulo  nimbus. 

Ci.  Cu.  Cirro-cumulus.  Fr.  Cu.  Fracto-cumulus. 

A.  Cu.  Alto-cumulus.  Fr.  N.  Fracto-nimbus. 

Cu.  Cumulus.  Fr.  S.  Fracto-stratus. 

S.  Cu.  Strato-cumulus.  Scf.  Stratus  Cumuliformis. 

S.  Stratus.  Ncf.  Nimbus  Cumuliformis. 

A.  S.  Alto-stratus.  M.  Cu.  Mammato  Cumulus. 

Abbreviations  in  ordinary  use  : 

0          Degree.  Km.  Kilometre. 

F.        Fahrenheit.  M.  Metre. 

C.        Centigrade.  Cent.  Centimetre. 

Max.  Maximum.  MM.  Millimetre. 

Min.    Minimum.  A*-  Micron  =0.001  mm. 


Cloud  Definitions  and  Notations. 

1.  CIRRUS    (Ci.). — Isolated,    feathery   clouds,    of   fine   fibrous   texture; 

"Mares'  tails." 

2.  CIRRO-STRATUS  (Ci.-S  ). — Fine,  whitish  veil,  giving  a  whitish  appear- 

ance to  the  sky  ;  often  produces  halos  ;   "  Cirrus  Haze." 

3.  CIRRO-CUMULUS  (Ci.-Cu.). — Small,  fleecy  white  balls  and  wisps,  with- 

out shades,  arranged  in  groups,  and  often  in  lines;  "Mackerel 
Sky." 

4.  ALTO-CUMULUS  (A.-Cu.). — Larger  white  or  grayish  balls,  with  shaded 

portions,  in  flocks  or  rows,  often  so  close  that  edges  meet. 

5.  ALTO-STRATUS  (A.-S.). — Thick  veil  of  gray  or  bluish  color,  brilliant 

near  sun  or  moon.     May  produce  coronae. 

6.  STRATO-CUMULUS  (S.-Cu.). — A  succession  of  rolls  of  dark  clouds  which 

frequently  cover  the  whole  sky.  The  characteristic  cloud  of  storm 
areas,  especially  of  the  fore  part  of  those  areas. 

7.  NIMBUS  (N.). — Rain  cloud.     A  thick  layer  of  dark  clouds,  without 

shape,  from  which  continuous  rain  is  falling.  Cirro-Stratus  or 
Alto-Stratus  is  seen  through  the  breaks.  Low-flying  fragments 
are  known  as  "scud." 

8.  CUMULUS  (Cu.). — Thick  clouds  whose  summits  are  domes  with  protu- 

berances, but  whose  bases  are  flat ;   ' '  Woolpack  ' '  clouds. 

9.  CUMULO-NIMBUS   (Cu.-N.). — Thunder-shower  clouds.       Mountainous 

clouds  surrounded  at  top  by  veil  or  false  cirrus,  and  below  by 
nimbus-like  masses  of  cloud. 

271 


TABLE   102. 

10.  STRATUS  (S.). — Horizontal  sheet  of  low  cloud  analogous  to  fog,  but  not 

touching  the  ground. 
The  following  terms  are  allowable,  but  not  officially  defined  : 

1 1 .  FRACTO  CUMULUS  (FR.  Cu.) . — Detached  clouds  formed  in  strong  winds. 

12.  FRACTO  NIMBUS  (FR.  Ni.).—  "  "  " 

13.  FRACTO  STRATUS  (FR.  ST.).—  "  "  " 

14.  STRATO  CUMULO  FORMIS  (S.  Cu.  F.). — Resembling  St.  Cu. 

15.  NIMBUS  CUMULO  FORMIS  (N.  Cu.  F.).—  "          Cu.  Ni. 

1 6.  CUMULUS  LENTICULARIS  (Cu.  L.). — Ovoid  clouds,  with  sharp  edges. 

17.  MAMMATO  CUMULUS  (M.  Cu.). — Cumulus  having  a  mammilated  lower 

surface. 

18.  TONITRO  CIRRUS,    FALSE  CIRRUS,    VEIL  CIRRUS   (To.  Ci.). — Thin 

cloud  sheet  flowing  from  the  top  of  Cu.  Ni. 

The  scale  for  recording  amount  of  cloud  varies  from  o,  clear  blue  sky,  to  10,  overcast. 


TABLE  103. 

NOTATION  FOR  THE  USE  OF  NAVIGATORS. 

BEAUFORT'S  NOTATION  FOR  USE  AT  SEA. 

From  U.  S.  Weather  Bureau  Instructions  for  Us^  in  Ocean  Meteorology,  1905. 
STATE   OF  THE   WEATHER. 

b. — Clear  blue  sky.  q. — Squally  weather. 

c  — Cloudy  weather.  r. — Rainy  weather,  or  continuous 
d. — Drizzling,  or  light  rain.  rain. 

f. — Fog,  or  foggy  weather.  s. — Snow,  snowy  weather,  or  snow 
g. — Gloomy,  or  dark,  stormy-looking  falling, 

weather.  /. — Thunder. 

h. — Hail.  u. — Ugly  appearances,  orthreaten- 

/. — L/ightning.  ing  weather. 

m. — Misty  weather.  v. — Visibility  of  distant  objects. 

o. — Overcast.  w. — Wet,  or  heavy  dew. 

p. — Passing  showers  of  rain.  z. — Hazy. 

To  indicate   greater  intensity,  underline   the  letter  thus  :    r,   heavy  rain  ;    r,  very 
heavy  rain,  etc. 

STATE   OF   THE   SEA. 

B. — Broken  or  irregular  sea.  M. — Moderate  sea  or  swell. 

C. — Choppy,  short,  or  cross  sea.  R. — Rough  sea. 

Q. — Ground  swell.  S. — Smooth  sea. 

H. — Heavy  sea.  T. — Tide  rips. 
L. — Long  rolling  sea. 

272 


TABLE  103. 

Observations  on  the  character  of  deep  sea  waves  are  valuable,  if  care- 
fully made.  The  most  important  points  to  observe  are  :  i.  The  apparent 
periodic  time,  or  interval,  in  seconds,  between  the  crests  of  successive  waves 
as  they  pass.  2.  The  true  direction  from  which  they  come,  and  the  ship's 
true  course  and  speed  at  the  time.  3.  The  estimated  heights  of  several 
waves,  from  hollow  to  crest.  4.  The  depth  of  the  sea  where  the  observa- 
tions were  made,  or  at  least  the  exact  position  of  the  ship,  so  that  the  depth 
may  be  obtained. 


TABLE  104. 

ACCELERATION    OF    APPARENT    GRAVITY    ON    THE    EARTH 
AT    SEA    LEVEL. 

£•  =  9.77989  -|-  0.05221  sin2  <f  —  9.80599  —  0.02610  cos  2  <p. 


Lati- 
tude 
<P. 

Gravity 
g> 

Log  g. 

Log  g/go. 

Lati- 
tude 
¥• 

Gravity 
g- 

Log£\ 

Log  JT  /^ 

0 

Metres. 

o 

Metres. 

O 

9.7798 

0.99033 

9.99884 

45 

9  .  8060 

0.99149 

o  .  ooooo 

5 

.7803 

.99035 

.99886 

50 

.8105 

.99169 

.00020 

10 

.7814 

.  99040 

.99891 

55 

.8150 

.99189 

.  00040 

15 

.7834 

.99049 

.99900 

60 

.8191 

.99207 

.  00058 

20 

.7859 

.99060 

.99911 

65 

.8227 

.99223 

.00074 

25 

.7893 

.99075 

.99926 

70 

.8261 

.99238 

.  00089 

30 

.7929 

•99°9t 

.99942 

75 

.8286 

.99249 

.00100 

35 

.7969 

.99109 

.99960 

80 

.8306 

.99258 

.00109 

40 

.8014 

.99129 

9.99980 

85 

.8317 

.99263 

.00114 

45 

9.8060 

0.99149 

o.ooooo 

90 

9.8322 

0.99265 

o.  00116 

273 


INDEX. 


Page 

Abbe,  C. ,  work  cited xxxiii 

Absolute  temperature,  conversion  into 
Centigrade,  Fahrenheit,  and  Reau- 
mur  xi,  2 

notation 248 

Absorption,    by     atmospheric    water 

vapor  lines  in  infra-red 234 

Acceleration  of  apparent  gravity 273 

Air,  coefficient  of  expansion 247 

density  of,  at  different  humidities, 

English .liv-lv,  221-223 

Metric liv-lvi,  225-228 

density  of,  at  different  pressures, 

English liv-lvi,  221-223 

Metric liv-lvi,  225-228 

density  of,  at   different  tempera- 
tures, 

English liv-lv,  220 

Metric liv-lvi,  225-228 

gas  constant  for 248 

quantity  heat 248 

specific  gravity , 248 

specific  heat 248 

specific  volume 247 

weight  per  unit  volume 247 

weight  in  grammes  per  cubic  cen- 
timetre  liv-lvi,  220-228 

Angle,  conversion  of  days  into. .  .212-215 
Angular  velocity,  notation  and  values 

for 246 

Angot,  A. ,  treatise  cited ^xii 

Aqueous  vapor,  decrease  of  pressure 

with  altitude xliii,  146 

pressure  of,  at  low  temperature, 

xxxvi,  130,  131 

pressure  of,  by  psychrometric  ob- 
servations, 

English,  .xxxviii,  xxxix,  134,  135 

Metric xli,  142,  143 

pressure  of,  in  saturated  air, 

English. . .  .xxxv,  xxxvi,  122-127 

Metric xxxv,  xxxvi,  128-129 

weight  of, 

English xxxvii,  132 

Metric xxxvii,  133 


Page 

Arc,  conversion  into  time li,  210 

Aschkinass, Rubens  and,  treatise  cited.  235 
Atmosphere, 

equivalent  weight 245 

height 245 

Atmospheric  water  vapor, 

absorption  by,  in  infra-red 234 

lines  in  visible  spectrum 233 

Avoirdupois,  conversion  into  metric 

Ivi,  229-230 

Babinet,  barometric  formula  of.xxxii,  118 

Barometer,  constant 247 

correction    for     (in    determining 
height), 
humidity, 

English xxviii,  108 

Metric xxx,  112 

variation  of  gravity  with  alti- 
tude, 

English xxviii,  109 

Metric xxx,  115 

latitude  and  weight  of  mer- 
cury, 

English xxviii,  loS 

Metric xxx,  114 

temperature, 

English xxviii,  104 

Metric xxx,  1 1 1 

determination  of  height  by, 

Babinet's  formula  . xxxii,  118 

Ivaplace's  formula xx,  xxvii 

difference  in  height  correspond- 
ing to, 
a  change  of  o.oi  inch,  .xxxi,  116 

a  change  of  I  mm xxii,  117 

pressure  formulae .247,  249 

pressures  corresponding  to   tem- 
perature of  boiling  water.,  xxxv,  119 
reduction  to, 
sea  level, 

English xx-xxv,  60-70 

Metric xx  -xxvi,  78-91 

standard  gravity, 

English xviii,  xix,  58 

275 


276 


Page 

Metric xviii,  xix,  59 

standard  temperature, 

English .  c xvi,  14 

Metric xvii,  34 

value  for  auxiliary  formula  in  de- 
termining height, 

English xxvii,  100 

Metric xxix,  no 

Beaufort,  Admiral,  wind  scale,  .xlvi,  160 

notation  for  use  at  sea Ix,  272 

Belli,  work  cited xxxviii 

Bessel,  work  cited liii 

Bigelow,  F.  H.,  work  cited. ..  .xxiv,  xliii 
Bigelow's  standard  system  of  notation 

and  formulse lix,  245 

Broch,  work  cite:l x^xv,  Iv,  122,  132 

Calorie,  value  of 248 

Centigrade,  conversion  into  Absolute, 

Fahrenheit,  and  Reaumur xi,  2 

conversion  into  Fahrenheit,  .xii,  7-9 
near  boiling  point  of  water,  xii,  9 

differences  of xiii,  9 

C.  G.  S.  unit  of  magnetic  intensity, 

Ivii,  231 

Clarke,  treatise  cited xxii,  xlvi,  xlvii 

spheroid xlvi,  li 

Clouds,  names  and  abbreviations. .271,  272 

Coefficient,  of  expansion 247 

in  altitude 246 

in  latitude 246 

Constant,  gas 248 

gradient 249 

humidity 248 

Continental  measures  of  length  and 

equivalents 208 

Conversion  of,  measures  of  time  and 

angle H,  209-218 

linear  measures xlix,  180-208 

thermometric  scales xi,  2-9 

grains  into  grammes Ivii,  230 

grammes  into  grains Ivii,  231 

kilogrammes  into  pounds Ivi,  230 

pounds  into  kilogrammes Ivi,  229 

units  of  magnetic  intensity.  .Ivii,  231 
Correction, 

in  determining  heights  by  barom- 
eter, 

for  humidity, 

English xxviii,  108 

Metric xxx,  112 


Page 

for  variation  of  gravity  with 
altitude, 

English xxviii,  109 

.     Metric xxx,  115 

for  latitude  and  weight  of  mer- 
cury, 

English xxviii,  106 

Metric xxx,  114 

for  temperature, 

English xxviii,  104 

Metric xxx,  in 

for  temperature  of  thermometer 

stem xiv,  12 

Cosines,  table  of  natural lix,  239 

Cotangents,  table  of  natural lix,  241 

Days,    conversion    into    decimals    of 

year  and  angle Hi,  212-215 

conversion   of   decimals  of,   into 
hours,minutes,  and  seconds. liii,  216 

Declination  of  sun xlix,  177 

Degree,   length   of,  of   meridian  and 

any  parallel xlvii,  164,  165 

at  different  latitudes,  .xlvii,  164,  165 
Degrees,  interconversion  of  Absolute, 
Centigrade,  Fahrenheit,  and  Reau- 
mur  xi,  xii,  2-9 

Density  of  air liv-lvi,  220-228 

Depth    of     water    corresponding     to 

weight  of  snow  or  rain Iviii,  232 

Determination  of   heights  by  barom- 
eter, 

English  system,  .xxvi-xxix,  100-109 
Metric  system. .  .xxix,  xxxi,  110-115 

Babinet's  formula  for xxxii,  118 

Depression  of  the  dew-point 138-141 

Dew-point xxxviii,  xii 

depression  of 138-141 

Differences,  in  height,  corresponding 
to  changes  in  barometer, 

xxxi,  xxxii,  116,  117 
Differences, 

Centigrade  to  Fahrenheit xiii,  9 

Fahrenheit  to  Centigrade xiii,  9 

Division  of  numbers  by  28,  29,  and  31 

Iviii,  lix,  233-235 

Duration  of  sunshine xlviii,  166-177 

Dyne Ivii,  231 

El,  value  of  the 208 

Elasticity,  equation  for .247 


INDEX. 


277 


Page 

Espy,  treatise  cited xxxviii 

Expansion,  coefficient  of 247 

Exponents 248 

Fahrenheit,  conversion  into  Absolute, 
Centigrade,  and  Reaumur,  .xi,  xii,  3-6 
differences  into  differences  Centi- 
grade   xiii,  9 

Fathom,  Swedish,  value  of 208 

Ferrel,  Wm.,  treatise  cited, 

xxii,  xxxi,  xxxix,  xlix 
Feet,  conversion  into  metres. .  .1,  200-201 
per  second  into  miles  per  hour, 

xlv,  155 

Foot,  value  of,  for  different  nationali- 
ties  208 

Formula,  Babiuet's  barometric .  xxxii,  118 
Lambert's,  wind  direction, 

xliii,  148-153 

Laplace's  barometric xx,  xxvii 

Formulae,  Bigelow's  standard  system 

of  notation  and lix,  245-249 

Fowle,  F.  E.,  treatise  cited 234 

Gas  constant 248 

Gaussian  units Ivii,  231 

Geodetical  tables xlvi,  161 

Gradient 249 

constant 249 

distance 249 

vertical 249 

Grains,  conversion  into  grammes, 

Ivii,  230 
Grammes,  conversion  into  grains, 

Ivii,  231 

Gravity,  acceleration  of 273 

constants 245 

correction  for  variation  of, 

with  altitude,  .xix,  xxxi,  109,  115 
with  latitude,  .xix,  xxxi,  106,  114 
reduction  of  barometric  readings 

to  standard xviii-xxiv,  58-98 

relative  acceleration   in  different 

latitudes xlvi,  162,  163 

value  of 245,  247 

Guyot,  A. ,  treatise  cited xxii 

Hann,  J.,  treatise  cited xliii 

Hanzlik,  S.,  work  cited lix 

Harkness,  Wm.,  treatise  cited, 

xix,  xxii,  xlvi 
Hazen,  H.  A.,  treatise  cited.. xliv,  xlv,  Iviii 


Page 
Heat, 

equivalent  of  work 248 

latent,  of  melting  ice. 249 

latent,  of  vaporizing  water. 249 

mechanical  equivalent  of 248 

quantity, 

air 248 

aqueous  vapor 248 

water 248 

specific,  of 

air 248 

aqueous  vapor 248 

water 248 

units  of 248 

Height,  determination  of, 
by  barometer, 

English xxvi-xxix,  100-109 

Metric xxix-xxxi,  110-115 

homogeneous  atmosphere. . .  245,  247 
thermometrical    measurement  of 

xxxiii,  119 
Hours,  conversion  into  decimals  of  a 

day Hi,  216 

minutes   and   seconds   into   deci- 
mals of liii,  217 

Humidity, 

correction    for,    in    determining 
heights  by  barometer, 

English xxviii,  108 

Metric xxx,  112 

relative,  Fahrenheit, 

xxxviii-xlii,  138-141 
Centigrade,  xxxviii-xlii,  144-145 
term  for,  in  determining  density 
of  air, 

English Iv.  221-223 

Metric Ivi,  225-227 

Hygrometrical  tables xxxv,  122-146 

Hypsometric  formula xx 

Hypsometry xxxiii,  xxxiv,  119 

Ice,  latent  heat  of 249 

Inches,  conversion  into  millimetres, 

xlix,  180-186 
Infra-red    Spectrum,    absorption    by 

water  vapor  lines  in Iviii,  234 

Interconversion  of  nautical  and  statute 

miles li,  208 

sidereal  and  solar  time liii,  218 

International  meteorological  symbols.  271 

i  H.,  treatise  cited 160 


278 


INDEX. 


Page 
Kilogrammes,  conversion  into  pounds, 

Ivi,  230 

Kilometres  into  miles li,  206-207 

per  hour  into  metres  per  second, 

xlvi,  159 
Klafter,  Wiener,  value  of 208 

Lambert's  formula,  mean  wind  direc- 
tion   xliii,  148-153 

Landolt  and  Bornstein,  work  cited, 

xxxvi,  Iv,  Ivi 

Laplace,  formula  of xx,  xxvii 

Latent  heat,  ice 249 

water 249 

Latitude,  gravity  correction  for, 

xix,  xxx,  106,  114 

Laughton,  J.  K.,  treatise  cited 160 

Length,  arc  of  meridian xlvii,  164 

arc  of  parallel xlvii,  165 

continental  measures  of,  with 
metric  and  British  equivalents, 

li,  208 
Libbey,  Wm.,  work  cited, 

xxxviii,  xlviii,  Ivii 

Line,  old  French,  value  of 208 

Linear  measures .- xlix,  179-208 

Logarithms,  table lix,  243 

Naperian  base 246 

modulus  of  common 246 

Marek,  M.,  treatise  cited xxi 

Marvin,  C.  F.,  work  cited xv,  xxxvi 

Mass,  units  of 246 

Mean   time,  conversion  of  solar  into 
sidereal Hii,  218 

at  apparent  noon liii,  217 

Measures  of  angle U,  209 

of  length li,  208 

of  time li,  209 

Mechanical  equivalent  of  heat 248 

Mercury,  specific  gravity  of 248 

weight  of  a  cubic  centimetre 246 

weight  per  unit  volume 247 

Meridian,  arcs  of  terrestrial xlvii 

length  of  a  degree xlvii,  164 

Meteorological  stations lix,  250-267 

Metre ; vi,  xlix,  246 

Metres,  conversion  into  feet. .  .1,  202,  203 

per  second    into  kilometres  per 
hour xlvi,  158,  159 

per  second  into  miles  per  hour, 

xlv,  156,  157 


Page 

Mile,  different  values  for 208 

Miles,  conversion  into  kilometres, 

li,  204-205 
per  hour  into  feet  per  second, 

xlv,  154,  155 

kilometres  per  hour xlv,  154 

metres  per  second,  .xlv,  154,  157 
Millimetres,  conversion  into  inches, 

1,  187-199 

Minutes  of  time  into  arc Hi,  211 

into  decimals  of  a  day Hi,  216 

day  into liii,  216 

into  decimals  of  an  hour liii,  217 

Moritz,  A xxxv 

Naperian  base  of  logarithms 246 

Nautical  mile,  equivalent  in  statute. li,  208 

Neumeyer,  G. ,  treatise  cited 160 

Numbers,  logarithms  of lix,  243 

Notation,  Beaufort's,  for  use  at  sea,  Ix,  272 

Bigelow's  system  of lix,  245 

cloud Ix,  271 

Ounces,  conversion  into  kilogrammes, 

Ivi,  229 
kilogrammes  into Ivi,  Ivii,  230 

Palm,  Netherlands,  value  of 208 

Parallel,  length  of  a  degree  on.. xlvii,  165 

Paschen,  F. ,  treatise  cited 235 

Pounds,  conversion  into  kilog' amines, 

Ivi,  229 

imperial  standard Ivi 

Pressure,  barometric,  value  of 247 

of  aqueous  vapor  .  .    134,  135 

English xxxviii,  122,  128 

Metric xli,  128,  129,  142 

of  aqueous  vapor  at  low  tempera- 
ture  xxxvi,  130,  131 

decrease  with  altitude xliii,  146 

units  of  force  of 247 

units  of  weight  of 247 

Prototype  kilogramme Ivi 

Psychrometric  observations, 
reduction  of, 

Bnglish xxxix,  134,  137 

Metric xli,  142-143 

Quantity   of  water  corresponding   to 
rainfall Iviii,  232 

Rainfall,  conversion  of  depth  of,  into 
gallons  and  tons Iviii,  232 


INDEX. 


279 


Page 
Reaumur,  conversion  to  Absolute, 

Centigrade,  and  Fahrenheit xi,  2 

Regnault,  treatise  cited xxxiv,  xxxv 

Reduction,  of  barometer  to 

sea  level xx-xxiv,  60-98 

standard  gravity .  .xxxi,  58,  59 

standard  temperature, 

xv-xix,  14-56 
psychrometric  observations, 

xxxix,  xli,  134,  142 

snowfall  measurements xliii,  146 

Relative,  humidity, 

xxxviii,  xlii,  138-141,  144-145 
intensity  of  solar  radiation,  .xlix,  178 

Rode,  Danish,  value  of 208 

Rotch,  A.  L.,  work  cited xlvi 

Rowland,  work  cited Iviii 

Rubens  and  Aschkinass,  treatise  cited, 

235 

Ruthe,  Prussian,  value  of 208 

Norwegian,  value  of 208 

Sagene,  Russian,  value  of 208 

Scales,  comparison  of  Absolute,  Centi- 
grade, Fahrenheit,  and  Reaumur, 

xi,  2-9 

Schott,  C.  A.,  treatise  cited 160 

Scott,  R.  H..  treatise  cited 160 

Sea,  state  of,  symbols  for  272 

Sea-level, 

reduction  of  barometer  to, 

English xx-xxv,  60-77 

Metric xx-xxvi,  78-98 

Seconds,  conversion  of  decimals  of  a 

day  into liii,  216 

into  arc 211 

into  decimals  of  a  day Hi,  216 

into  decimals  of  an  hour liii,  217 

reduction   for,   sidereal    or  solar 

time Hv,  218 

Sidereal  time,  conversion  to  solar, 

liii,  liv,  218 

Sines,  table  of  natural lix,  239 

Snowfall,    weight    corresponding    to 

depth  of  water .xlii,  146 

Solar,  radiation,  relative  intensity  of 

xlix,  178 
time,  mean,    conversion   into 

sidereal liii,  liv,  218 

Specific,  gravity  of  air,  aqueous  vapor, 
carbolic  acid,  ice,  mercury,  water.   248 


Page 

heat  of  air,  aqueous  vapor,  water  248 
weight  of  air,  aqueous  vapor,  ice, 

mercury,  water 247 

Spectrum,  water  vapor  lines  in  visible 

Iviii,  233 

absorption  in  infra-red Iviii,  234 

Spheroid,  Clarke's xlvii 

State  of  sea,  symbols  for 272 

of  weather,  symbols  for 272 

Stations,  list  of  meteorological, 

lix,  250-267 

Statute  miles,  conversion  of,  into  nau- 
tical   H,  208 

Sun,  declination  of xlix,  177 

Sunshine,  duration  of xlviii,  166-177 

Symbols,  International   Meteorolog- 
ical  lx,  268 

Tangents,  table  of  natural .lix,  241 

Temperature, 

correction  for  thermometer  stem, 

xiv,  12 

reduction  to  sea  level,  .xiii,  xiv,  10,  n 
term  in  determination  of  heights 

by  barometer.. xxviii,  xxx,  104,  in 
term  in  determination  of  density 

of  air 220,  224 

Thermometer,  hypsometric xxxiv 

correction  for  temperature  of 

mercury  in  stem xiv,  12 

Thermometric  scales,  interconversion 

of xi,  2-9 

Thorpe,  T.  E.,  treatise  cited xiv 

Time, 

arc  into H,  210 

into  arc lii,  211 

mean,  at  apparent  noon liii,  217 

mean  solar  into  sidereal . .  .liii-liv,  2 1 8 

sidereal  into  mean  solar,  .liii-liv,  218 

Toise,  value  of 208 

Units  of  magnetic  intensity Ivii,  231 

Vapor, 

aqueous,  pressure  of, 

English xxxv,  122-127 

Metric xxxvi,  128-142 

at  low  temperature.. .  .xxxvi,  130-131 
pressure  by  psychrometric  obser- 
vations, 

English xxxix,  134 

Metric , xli,  142 


280 


INDEX. 


Page 
pressure  decrease  with  altitude, 

xliii,  146 
specific    heat,    specific    gravity, 

quantity  heat,  gas  constant. . .   248 
specific  weight,  weight  per  unit 

volume 247 

tension,  formula  for 249 

weight  of xxxvii,  xxxviii,  132, 133 

Vara,  values  of 208 

Versta  or  Werst,  value  of 208 

Visible  spectrum,  water  vapor  lines 
in Iviii,  233 

Water,  latent  heat 249 

quantity  heat,  specific  heat,  spe- 
cific gravity,  gas  constant. . .   248 
specific  weight,  weight  per  unit 
volume 247 


Page 

Weather,  state  of,  symbols  for 272 

Weight,  aqueous  vapor, 

xxxvii,  xxxviii,  132,  133 
in  grammes   of    a  cubic    centi- 
metre of  air liv-lvi,  220-226 

per  unit  volume,  of  air,  aqueous 

vapor,  ice,  mercury,  water 247 

specific,  of  air,    aqueous  vapor, 

ice,  mercury,  water 247 

Werst  or  Versta,  value  of 208 

Wind,  mean  direction  by  Lambert's 

formula xliii,  148-153 

scale,  Beaufort's xlvi,  160 

Year,  days  into  decimals  of,  and  angle 

Hi,  212-215 


TL    J^i  f 


793330 


•ssr 


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